RFC 3454

Preparation of Internationalized Strings ("stringprep")

📅 published January 2003, from ietf

RFC 3454: Preparation of Internationalized Strings ("stringprep") 💖

okay so this is RFC 3454, "Preparation of Internationalized Strings ("stringprep")" 🎀. P. Hoffman (IMC & VPNC) and M. Blanchet (Viagenie) wrote it, it's a Standards Track doc from the Network Working Group, and it's dated December 2002. The title block doesn't list anything it obsoletes or updates, so it's standing on its own ✨.

Status of This Memo ✨

This is an Internet standards track protocol spec for the Internet community, and it's literally asking for discussion and suggestions 🫶. For the current standardization state and status of this protocol, check the "Internet Official Protocol Standards" (STD 1) 📚. Distribution of this memo is unlimited 🌸.

Copyright Notice 💅

Abstract 🦋

This doc is a framework for preparing Unicode text strings so that string input and string comparison are more likely to make sense for typical users all over the world 🌈. stringprep is useful for protocol identifier values, company and personal names, internationalized domain names, and other text strings 🍓.

This doc does not specify how protocols should prepare text strings 🙈. Protocols must create profiles of stringprep to fully specify the processing options ✨.

Table of Contents 🧚

   1. Introduction....................................................3
     1.1 Terminology..................................................4
     1.2 Using stringprep in protocols................................4
   2. Preparation Overview............................................6
   3. Mapping.........................................................7
     3.1 Commonly mapped to nothing...................................7
     3.2 Case folding.................................................8
   4. Normalization...................................................9
   5. Prohibited Output..............................................10
     5.1 Space characters............................................11
     5.2 Control characters..........................................11
     5.3 Private use.................................................12
     5.4 Non-character code points...................................12
     5.5 Surrogate codes.............................................13
     5.6 Inappropriate for plain text................................13
     5.7 Inappropriate for canonical representation..................13
     5.8 Change display properties or deprecated.....................13
     5.9 Tagging characters..........................................14
   6. Bidirectional Characters.......................................14
   7. Unassigned Code Points in Stringprep Profiles..................15
     7.1 Categories of code points...................................16
     7.2 Reasons for difference between stored strings and queries...17
     7.3 Versions of applications and stored strings.................18
   8. References.....................................................19
     8.1 Normative references........................................19
     8.2 Informative references......................................19
   9. Security Considerations........................................19
     9.1 Stringprep-specific security considerations.................19
     9.2 Generic Unicode security considerations.....................20
   10. IANA Considerations...........................................21
   11. Acknowledgements..............................................22
   A. Unicode repertoires............................................23
     A.1 Unassigned code points in Unicode 3.2.......................23
   B. Mapping Tables.................................................31
     B.1 Commonly mapped to nothing..................................31
     B.2 Mapping for case-folding used with NFKC.....................32
     B.3 Mapping for case-folding used with no normalization.........61
   C. Prohibition tables.............................................78
     C.1 Space characters............................................78
       C.1.1 ASCII space characters..................................78
       C.1.2 Non-ASCII space characters..............................79
     C.2 Control characters..........................................79
       C.2.1 ASCII control characters................................79
       C.2.2 Non-ASCII control characters............................79
     C.3 Private use.................................................80
     C.4 Non-character code points...................................80
     C.5 Surrogate codes.............................................80
     C.6 Inappropriate for plain text................................80
     C.7 Inappropriate for canonical representation..................81
     C.8 Change display properties or are deprecated.................81
     C.9 Tagging characters..........................................81
   D. Bidirectional tables...........................................81
     D.1 Characters with bidirectional property "R" or "AL"..........81
     D.2 Characters with bidirectional property "L"..................82
   Authors' Addresses................................................90
   Full Copyright Statement..........................................91

1. Introduction 🌈

Apps can show text in lots of different ways 💅. A user can also type text into an app in a myriad of fashions ✨. Internationalized text (text that isn't limited to the narrow set of US-ASCII characters) has tons of input and display behaviors, which makes it hard to compare text consistently 😭.

This doc specifies a framework of processing rules for Unicode text 🦋. Other protocols can create profiles of these rules, and those profiles let users enter internationalized text strings in apps with the best chance of getting the strings right 💖. Here, "correct" means that if two different people enter what they think is the same string into two different input mechanisms, the strings should match on a character-by-character basis 🫶.

This framework doesn't describe how data gets transcoded from other character sets into Unicode 🙈. In systems that use non-Unicode character sets, the transcoding algorithm is a critical part of enabling secure and "correct" operation of internationalized text strings 🔥.

Besides helping with string matching, profiles of stringprep can also exclude characters that shouldn't normally show up in text used in the protocol 🌸. A profile can block those characters by changing them to other characters, by removing them, or by raising an error if they would appear in the output 🍓. For example, because the backspace character can cause unpredictable display results, a profile can specify that a string containing a backspace character would cause an error 💀.

A profile of stringprep turns a single string of input characters into a string of output characters, or it returns an error if the output string would contain a prohibited character 👑. Stringprep profiles can't both emit a string and return an error 🎀.

Stringprep profiles can't account for every variation that might happen or that a user might expect 🧚. In particular, a profile can't account for choices of spelling in all languages for all scripts, because the number of alternative spellings of words and phrases is immense 😭. Users would probably expect all spelling equivalents to be made equivalent, or none of them to be 💜. Examples of spelling equivalents include "theater" vs. "theatre", and "hemoglobin" vs. "h<U+00E6>moglobin" in American vs. British English ✨. Other examples are simplified Chinese spellings of names (for example, "<U+7EDF><U+4E00><U+7801>") vs. the equivalent traditional Chinese spelling (for example, "<U+7D71><U+4E00><U+78BC>") 🌈. Language-specific equivalences such as "Aepfel" vs. "<U+00C4>pfel", which are sometimes considered equivalent in German, may not be considered equivalent in other languages 🦋.

1.1 Terminology 💜

The key words "MUST", "MUST NOT", "REQUIRED", "SHALL", "SHALL NOT", "SHOULD", "SHOULD NOT", "RECOMMENDED", "MAY", and "OPTIONAL" in this document are to be interpreted as described in BCP 14, RFC 2119 [RFC2119] 📚.

Note: A glossary of terms used in Unicode and ISO/IEC 10646 can be found in [Glossary]. Information on the 10646/Unicode character encoding model can be found in [CharModel] 🤓.

Character names in this document use the notation for code points and names from the Unicode Standard [Unicode3.2] and ISO/IEC 10646 [ISO10646] 🔥. For example, the letter "a" may be represented as either "U+0061" or "LATIN SMALL LETTER A" 💖. In the lists of mappings and the prohibited characters, the "U+" is left off to make the lists easier to read ✨. The comments for character ranges are shown in square brackets (such as "[CONTROL CHARACTERS]") and don't come from the standards 🌸.

1.2 Using stringprep in protocols 🌸

Okay so stringprep doesn't just vibe on its own, bestie. Other protocols have to call it at precisely-defined spots in their own specs ✨. Like, a protocol that accepts strings from the whole ISO/IEC 10646 [ISO10646] character repertoire might say "only strings processed with this specific stringprep profile are legal" 💅. Another one might do string comparison as one of its steps, and then say the comparison only happens after the strings go through a specific profile of stringprep 🫶.

When two protocols using different stringprep profiles interoperate, things can get messy 😭 because they might disagree about which characters are allowed in the final string. So, protocol devs should seriously consider re-using existing profiles of stringprep 🎀.

When devs want users to have the widest possible range of characters in input text strings, they should, where possible, make stringprep convert characters into a canonical form instead of prohibiting them 🦋.

It would be super easy to use stringprep to "fix" perceived mis-features or bugs in the current character standards, but stringprep profiles SHOULD NOT do that 🙅‍♀️. Not it!

A profile of stringprep can make tables that are different from the ones in this document's appendixes, but that's gonna be the exception 🧚. The whole point of stringprep is that it defines the tables, and the profiles just pick among those defined tables 💜.

A profile of stringprep MUST include all of the following:

The intended applicability of the profile 🌈
The character repertoire that is the input and output to stringprep (which is Unicode 3.2 for this version of stringprep) 📚
The mapping tables from this document used (as described in section 3) 🗺️
Any additional mapping tables specific to the profile ✨
The Unicode normalization used, if any (as described in section 4) 🔮
The tables from this document of characters that are prohibited as output (as described in section 5) 🚫
The bidirectional string testing used, if any (as described in section 6) ↔️
Any additional characters that are prohibited as output specific to the profile 💅

Each profile MUST state the character repertoire it operates on, no excuses 💁‍♀️. Appendix A lists the Unicode repertoires you can select from. No repertoire is ever complete, and characters are expected to keep getting added to the Unicode repertoire for the foreseeable future 🌱. Section 7 of this document explains how to handle characters assigned in later versions of the Unicode repertories, and subsections of appendix A list the unassigned code points for each repertoire too 📖.

This document is for Unicode version 3.2, and should not be considered to automatically apply to later Unicode versions 🙈. The IETF can update this document through an explicit standards action to handle later Unicode versions, as appropriate 👑.

This document lists the unassigned code points in the range 0 to 10FFFF for Unicode 3.2 in appendix A. The list in appendix A MUST be used by implementations of this specification 🔥. If there's any discrepancy between the appendix A list and the Unicode 3.2 specification, the appendix A list always wins 👑✨.

Each profile of stringprep MUST be registered with IANA 📝. The registration procedure is described in the IANA Considerations appendix. Basically, the IESG has to review each profile of stringprep 🧐. Protocol devs are strongly encouraged to look through the IANA profile registry when making new profiles, and to re-use logic from earlier profiles wherever possible 💖. Sometimes an existing profile can even be reused by a totally different protocol 🫧.

2. Preparation Overview 🧁

The steps for preparing strings are:

Map -- For each character in the input, check if it has a mapping and, if so, replace it with its mapping. This is described in section 3 🗺️.
Normalize -- Possibly normalize the result of step 1 using Unicode normalization. This is described in section 4 🔮.
Prohibit -- Check for any characters that are not allowed in the output. If any are found, return an error. This is described in section 5 🚫.
Check bidi -- Possibly check for right-to-left characters, and if any are found, make sure that the whole string satisfies the requirements for bidirectional strings. If the string does not satisfy those requirements, return an error. This is described in section 6 ↔️.

The above steps MUST be performed in the order given to comply with this specification. Order matters, bestie, no shuffling 💀.

The mappings in section 3, and the optional Unicode normalization in section 4, can be one-to-none, one-to-one, one-to-many, many-to-one, or many-to-many 🌀. That means some characters might get eliminated, or replaced by more than one character, so the output of this step might be shorter or longer than the input 📏. Because of that, the system using stringprep MUST be prepared to receive a longer or shorter string than the one that was input into the stringprep algorithm 🫶.

3. Mapping 🗺️✨

Each character in the input stream MUST be checked against a mapping table 🔍. The mapping table SHOULD come from this document, although the profile MAY add to or alter the mapping table 🎀. The mapping tables are subsections of appendix B 📚.

The lists in appendix B MUST be used by implementations of this specification 💅. If there are any discrepancies between the appendix B lists and the subsections below, the appendix B lists always take precedence 👑.

For any individual character, the mapping table MAY specify that the character be mapped to nothing, mapped to one other character, or mapped to a string of other characters 🦋.

Mapped characters are not re-scanned during the mapping step 🙅‍♀️. So if character A at position X gets mapped to character B, character B (now sitting at position X) is NOT checked against the mapping table again. No double dipping! 💖

3.1 Commonly mapped to nothing 🫧

The following characters are simply deleted from the input (aka mapped to nothing), because their presence or absence in protocol identifiers should not make two strings different 🥹. They're listed in Table B.1 📋.

Some characters are only useful in line-based text, and are otherwise invisible and ignored 👻:

00AD; SOFT HYPHEN
1806; MONGOLIAN TODO SOFT HYPHEN
200B; ZERO WIDTH SPACE
2060; WORD JOINER
FEFF; ZERO WIDTH NO-BREAK SPACE

Some characters affect glyph choice and glyph placement, but don't bear any semantics 🎨:

034F; COMBINING GRAPHEME JOINER
180B; MONGOLIAN FREE VARIATION SELECTOR ONE
180C; MONGOLIAN FREE VARIATION SELECTOR TWO
180D; MONGOLIAN FREE VARIATION SELECTOR THREE
200C; ZERO WIDTH NON-JOINER
200D; ZERO WIDTH JOINER
FE00; VARIATION SELECTOR-1
FE01; VARIATION SELECTOR-2
FE02; VARIATION SELECTOR-3
FE03; VARIATION SELECTOR-4
FE04; VARIATION SELECTOR-5
FE05; VARIATION SELECTOR-6
FE06; VARIATION SELECTOR-7
FE07; VARIATION SELECTOR-8
FE08; VARIATION SELECTOR-9
FE09; VARIATION SELECTOR-10
FE0A; VARIATION SELECTOR-11
FE0B; VARIATION SELECTOR-12
FE0C; VARIATION SELECTOR-13
FE0D; VARIATION SELECTOR-14
FE0E; VARIATION SELECTOR-15
FE0F; VARIATION SELECTOR-16

3.2 Case folding 🔤

If a profile is going to map characters for case-insensitive comparison, that profile SHOULD map using either appendix B.2 or appendix B.3 💅. Appendix B.2 is for profiles that also use Unicode normalization form KC, while appendix B.3 is for profiles that do not use Unicode normalization 🧠. These tables map from uppercase to lowercase characters 🔡. Note that this could have been "change all lowercase characters into uppercase characters" instead, but upper-to-lower folding was chosen because lowercase has a long tradition in current Internet applications and protocols 🌈.

If a profile creates its own mapping tables for case folding, they SHOULD be based on [UTR21], and SHOULD map from uppercase characters to lowercase 🛠️. The "CaseFolding.txt" file from the Unicode database SHOULD be used to prepare the mapping table 📂. The profile SHOULD do full case mapping (that is, using statuses C, F, and I) 💖.

If the profile uses Unicode normalization form KC (as described in section 4 of this document), watch out! Some characters don't have mappings in [UTR21] but still need processing. These include a few Greek characters and many symbols that contain Latin characters 🚨. The list of characters to add to the mapping table can be determined by the following algorithm:

b = NormalizeWithKC(Fold(a));
c = NormalizeWithKC(Fold(b));
if c is not the same as b, add a mapping for "a to c".

Because NormalizeWithKC(Fold(c)) always equals c, the table is stable from that point on 🧊✨.

Appendix B.3 is derived from the CaseFolding-3.txt file associated with Unicode 3.2, and appendix B.2 is based on appendix B.3 with the additional characters added from the algorithm above 🌸.

Authors of profiles of this document need to consider the effects of changing the mapping of any currently-assigned character when updating their profiles 🧐. Adding a new mapping for a currently-assigned character, or changing an existing mapping, could cause a variance between the behavior of systems that have been updated and systems that have not been updated 😬. Not a vibe, so be careful, babe! 🫶

4. Normalization ✨

Okay so, after the mapping step you can normalize the output using one of the Unicode normalization forms from [UAX15] 🫶. A profile gets to pick one of two options:

no normalization
Unicode normalization with form KC

A profile MAY choose to do no normalization 🙈. Lowkey though, a profile that skips it can give results that surprise regular users, depending on what input method they're using. Some input methods type compatibility characters that look exactly like the regular ones but have different code points, so the strings don't match even though they look identical. Normalization also helps with characters that have several combining diacritics stacked on them, because it puts those diacritics in a predictable order 💅.

BUT (and this is a real but) Unicode normalization needs pretty big tables and kind of tricky character reordering logic 😭. The size and complexity shouldn't feel scary unless you're in a super restricted environment, and you have to weigh it against user surprise when people compare strings that were never normalized. The tables used for normalization aren't included in this document. You have to derive them from the Unicode database, as described in [UAX15] 📚.

There's also a third form, Unicode normalization with form C. If a profile is going to use Unicode normalization, it MUST use form KC 💖. Form KC maps a lot of "compatibility characters" to their equivalents. Some UI systems let you type compatibility characters instead of the base ones, so using KC instead of C means more strings that users would expect to match actually do match ✨.

A profile that specifies Unicode normalization MUST use the normalization in [UAX15] that goes with the version of the Unicode character set the profile specifies 🌈.

The composition process in [UAX15] needs a fixed composition version of Unicode. That way, strings normalized under one version stay normalized under every future version 🧚.

The IETF is counting on Unicode not to change the normalization of characters that are already assigned in future normalization versions. If a future version of the normalization tables changes the normalized value of an existing character, profile authors have to look at those changes super carefully before they update their tables. Otherwise you get a mismatch between systems that have been updated and systems that haven't 💀.

5. Prohibited Output 🚫

Before any text gets emitted, it MUST be checked for prohibited code points 🔥. There are a bunch of different prohibited code points, and this section walks through them. A profile of this document MAY use all or some of the tables in appendix C 🎀.

The stringprep process never emits both an error and a string. If an error shows up while checking for prohibited code points, only the error gets returned 🙅‍♀️.

Heads up: the subsections below explain how the appendix C tables were put together. They're here for anyone who wants the backstory, but implementors should ignore them. Implementations that use tables MUST map based on the tables themselves, NOT on these descriptions of how the tables were made 💅.

The lists in appendix C MUST be used by implementations of this specification. If the lists in appendix C and the subsections below ever disagree, the appendix C lists always take precedence 👑.

Some code points listed in one section may also show up in other sections 🍓.

It's important to note that a profile of this document MAY prohibit additional characters 🦋.

Each subsection in this section has a matching subsection in appendix C. For example, the characters in section 5.1 are listed in appendix C.1 💜.

5.1 Space characters 🌸

Space characters can make it nearly impossible to transcribe a string accurately, and they can lead to user entry errors in a bunch of ways 😩. The list below is split into two tables in appendix C: Table C.1.1 has the ASCII code points, and Table C.1.2 has the non-ASCII ones. Most profiles that want to prohibit space characters will want to include both tables ✨.

0020; SPACE
00A0; NO-BREAK SPACE
1680; OGHAM SPACE MARK
2000; EN QUAD
2001; EM QUAD
2002; EN SPACE
2003; EM SPACE
2004; THREE-PER-EM SPACE
2005; FOUR-PER-EM SPACE
2006; SIX-PER-EM SPACE
2007; FIGURE SPACE
2008; PUNCTUATION SPACE
2009; THIN SPACE
200A; HAIR SPACE
200B; ZERO WIDTH SPACE
202F; NARROW NO-BREAK SPACE
205F; MEDIUM MATHEMATICAL SPACE
3000; IDEOGRAPHIC SPACE

5.2 Control characters 🎮

Control characters (or characters with a control function) are invisible and can cause unpredictable results when they get displayed 😵. The list below is split into two tables in appendix C: Table C.2.1 has the ASCII code points, and Table C.2.2 has the non-ASCII ones. Most profiles that want to prohibit control characters will want both tables 💖.

0000-001F; [CONTROL CHARACTERS]
007F; DELETE
0080-009F; [CONTROL CHARACTERS]
06DD; ARABIC END OF AYAH
070F; SYRIAC ABBREVIATION MARK
180E; MONGOLIAN VOWEL SEPARATOR
200C; ZERO WIDTH NON-JOINER
200D; ZERO WIDTH JOINER
2028; LINE SEPARATOR
2029; PARAGRAPH SEPARATOR
2060; WORD JOINER
2061; FUNCTION APPLICATION
2062; INVISIBLE TIMES
2063; INVISIBLE SEPARATOR
206A-206F; [CONTROL CHARACTERS]
FEFF; ZERO WIDTH NO-BREAK SPACE
FFF9-FFFC; [CONTROL CHARACTERS]
1D173-1D17A; [MUSICAL CONTROL CHARACTERS]

5.3 Private use 🔒

Private-use characters don't have defined meanings, so they're likely to get prohibited 🙈. The private-use characters are:

E000-F8FF; [PRIVATE USE, PLANE 0]
F0000-FFFFD; [PRIVATE USE, PLANE 15]
100000-10FFFD; [PRIVATE USE, PLANE 16]

5.4 Non-character code points 🧩

Non-character code points are code points that were allocated in ISO/IEC 10646 but aren't characters. Since they're already assigned, they're guaranteed never to later turn into characters 🌟.

FDD0-FDEF; [NONCHARACTER CODE POINTS]
FFFE-FFFF; [NONCHARACTER CODE POINTS]
1FFFE-1FFFF; [NONCHARACTER CODE POINTS]
2FFFE-2FFFF; [NONCHARACTER CODE POINTS]
3FFFE-3FFFF; [NONCHARACTER CODE POINTS]
4FFFE-4FFFF; [NONCHARACTER CODE POINTS]
5FFFE-5FFFF; [NONCHARACTER CODE POINTS]
6FFFE-6FFFF; [NONCHARACTER CODE POINTS]
7FFFE-7FFFF; [NONCHARACTER CODE POINTS]
8FFFE-8FFFF; [NONCHARACTER CODE POINTS]
9FFFE-9FFFF; [NONCHARACTER CODE POINTS]
AFFFE-AFFFF; [NONCHARACTER CODE POINTS]
BFFFE-BFFFF; [NONCHARACTER CODE POINTS]
CFFFE-CFFFF; [NONCHARACTER CODE POINTS]
DFFFE-DFFFF; [NONCHARACTER CODE POINTS]
EFFFE-EFFFF; [NONCHARACTER CODE POINTS]
FFFFE-FFFFF; [NONCHARACTER CODE POINTS]
10FFFE-10FFFF; [NONCHARACTER CODE POINTS]

The non-character code points are listed in the PropList.txt file from the Unicode database 📂.

5.5 Surrogate codes 💫

The following code points are permanently reserved for use as surrogate code values in the UTF-16 encoding. They'll never be assigned to characters in the Unicode repertoire, so they're prohibited 🚷:

D800-DFFF; [SURROGATE CODES]

5.6 Inappropriate for plain text 📝

These characters don't show up in regular text 🙅‍♀️.

FFF9; INTERLINEAR ANNOTATION ANCHOR
FFFA; INTERLINEAR ANNOTATION SEPARATOR
FFFB; INTERLINEAR ANNOTATION TERMINATOR
FFFC; OBJECT REPLACEMENT CHARACTER

Okay, the replacement character (U+FFFD) might get used when a string is displayed, but it doesn't make sense for it to be part of the string itself 🤔. Renderers often show it to mean "there would be a character here, but it can't be rendered." For example, on a computer with no Asian fonts, a string with three ideographs might get rendered as three replacement characters 🀄.

FFFD; REPLACEMENT CHARACTER

5.7 Inappropriate for canonical representation 💎

Ideographic description characters let different character sequences render the same way. That makes them a bad fit for strings that need exactly one canonical representation 🙃.

2FF0-2FFB; [IDEOGRAPHIC DESCRIPTION CHARACTERS]

5.8 Change display properties or are deprecated 🔄

These characters can change how things display, or change the order characters appear in when rendered. Some of them are also deprecated in Unicode 🫠.

0340; COMBINING GRAVE TONE MARK
0341; COMBINING ACUTE TONE MARK
200E; LEFT-TO-RIGHT MARK
200F; RIGHT-TO-LEFT MARK
202A; LEFT-TO-RIGHT EMBEDDING
202B; RIGHT-TO-LEFT EMBEDDING
202C; POP DIRECTIONAL FORMATTING
202D; LEFT-TO-RIGHT OVERRIDE
202E; RIGHT-TO-LEFT OVERRIDE
206A; INHIBIT SYMMETRIC SWAPPING
206B; ACTIVATE SYMMETRIC SWAPPING
206C; INHIBIT ARABIC FORM SHAPING
206D; ACTIVATE ARABIC FORM SHAPING
206E; NATIONAL DIGIT SHAPES
206F; NOMINAL DIGIT SHAPES

5.9 Tagging characters 🏷️

These characters are used for tagging text, and they're invisible 👻.

E0001; LANGUAGE TAG
E0020-E007F; [TAGGING CHARACTERS]

6. Bidirectional Characters ✨

Okay bestie, most characters get displayed left to right, but some go right to left 🔄 That's the Unicode feature called "bidirectional text," or "bidi" for short. Unicode has a whole deep dive on how to reorder glyphs for display when you're dealing with bidi text like Arabic or Hebrew. Check out [UAX9] for the full scoop. The main thing to know is that all Unicode text is stored in logical order 💅

A profile MAY choose to ignore bidirectional text. Ngl though, ignoring it can cause display ambiguities 🙈 It's super easy to make two different strings with the same characters (just in a different order) that still display identically. So to dodge most of those bidi display problems, profile creators should strongly consider including the bidirectional character handling in this section in their profile. It's giving protection 🛡️

The stringprep process never emits both an error and a string. If an error shows up while checking bidirectional strings, only the error gets returned. No double-dipping 🙅‍♀️

[Unicode3.2] defines several bidirectional categories, and every character has one assigned to it. For the requirements below, an "RandALCat character" is a character with the Unicode bidirectional categories "R" or "AL". An "LCat character" is a character with the Unicode bidirectional category "L". A lot of characters are in neither group, though! Latin digits (<U+0030> through <U+0039>) are a good example, since they have bidirectional category "EN" 🔢

In any profile that specifies bidirectional character handling, all three of the following requirements MUST be met:

The characters in section 5.8 MUST be prohibited.
If a string contains any RandALCat character, the string MUST NOT contain any LCat character.
If a string contains any RandALCat character, a RandALCat character MUST be the first character of the string, and a RandALCat character MUST be the last character of the string.

Requirement 3 is picky 😤 It prohibits strings like <U+0627><U+0031> ("aleph 1"), but it allows strings like <U+0627><U+0031><U+0628> ("aleph 1 beh") 🌸 [UAX9] goes into serious detail about the display order of strings made from particular categories of characters in particular sequences, so go there if you want the chaos explained.

Table D.1 lists the characters in the Unicode bidirectional categories "R" and "AL". Table D.2 lists all the characters in the Unicode bidirectional category "L". Both tables are derived from [Unicode3.2] 📚

7. Unassigned Code Points in Stringprep Profiles 🧚

This section is about two kinds of strings you'll see in typical protocols that use internationalized strings: "stored strings" and "queries" 🫶 Different Internet protocols use strings super differently, so these terms can't be used exactly the same way in every protocol that needs stringprep. Generally though, "stored strings" are the strings used in protocol identifiers and named entities, like names in digital certificates and DNS domain name parts. "Queries" are strings used to match against stored identifiers, like user-entered names for digital certificate authorities and DNS lookups 🔍

All code points that aren't assigned in the character repertoire named in a stringprep profile are called "unassigned code points." Stored strings using the profile MUST NOT contain any unassigned code points. Queries for matching strings MAY contain unassigned code points. This is the only part of the document where the requirements for queries are different from the requirements for stored strings, so pay attention here 👀

Using two different policies for where unassigned code points can show up means protocols that use stringprep profiles don't need versioning. That's honestly so iconic, because it keeps the overall processing simpler and means you don't have to invent a "protocol" just to handle versioning 💖 The ISO/IEC 10646 and Unicode repertoires get updated fairly often. When this document was written, that was about once a year. Every time a new version of a repertoire shows up, a new version of a profile MAY be created. Some end users are going to want the new code points the second they're defined, so it's a whole vibe 🌈

The list of unassigned code points MUST be given in a profile, and that list MUST be used by implementations of the profile 📜

The goal of the requirements in this section is to stop comparisons between two strings that were both allowed to contain unassigned code points 🚫 When two strings X and Y are compared, and Y was prepared in a way that permits unassigned code points, a negative result isn't definitive. The strings might not match even though they would match if a newer version of the profile were used for Y. But if both X and Y were prepared in a way that permits unassigned code points, something worse can happen: even a positive result isn't definitive 😱 The strings might match even though they wouldn't match under a newer version of the profile (one that prohibits a code point showing up in both X and Y).

Because of how versioning works in this section, stored strings that are embedded in structures that can't be changed (like the signed parts of digital certificates) MUST NOT contain any unassigned code points. Those are locked in forever, so no sneaking things in 🔒

7.1 Categories of code points

Every code point in a repertoire named by a stringprep profile can be sorted into a category, based on how it acts in the process described in the earlier sections of this document 🗂️

AO Code points that can be in the output
MN Code points that cannot be in the output, because they never appear as output from mapping or normalization
D Code points that cannot be in the output, because they're disallowed in the prohibition step
U Unassigned code points

A later version of a profile that references a newer version of a repertoire with new code points will inherently have some code points move out of category U into D, MN, or AO. For backwards compatibility, a subsequent version of a profile MUST NOT move code points from any other category. Put simply, current AO, MN, or D code points MUST NOT ever change to a different category 🚫

Stored strings MUST NOT contain any code points outside of AO for the latest version of a profile. So they're forbidden from containing code points in MN, D, or U 💀

Applications creating queries MUST treat U code points as if they were AO when preparing the query to be entered into the process described by a profile of stringprep. Those applications MAY optionally have a preprocessor that provides stricter checks. That could mean treating unassigned code points in the input as errors, or warning the user that the code point is unassigned in the version of the profile the software is based on. Whether to do that is a local matter for the software to decide 🫧

7.2 Reasons for the difference between stored strings and queries

Different software using different versions of a stringprep profile needs to interoperate with maximal compatibility 🤝 The scheme described in this section (stored strings MUST NOT contain unassigned code points, queries MAY include unassigned code points) gives you that compatibility without introducing any known security or interoperability issues. Slay 👑

Here's what happens if a query contains a code point from category U that's allowed in a newer version of a profile. The query either matches the string that was intended, or it matches no string at all. In this list, the query comes from an application using version oldVersion of a profile, the stored string was created using version newVersion of the same profile, and the code point X was in category U in oldVersion and has changed to AO, MN, or D. There are 3 possible scenarios:

X is assigned to AO. In newVersion, X is in category AO. Because the application passed X through, it gets a positive match with the stored string. There's one exceptional case, where X is a combining mark.

The order of combining marks is normalized, so if another combining mark Y has a lower combining class than X, then XY gets put into canonical order as YX. (Unassigned code points are never reordered, so this doesn't happen in oldVersion.) If the query contains YX, the query gets a positive match with the stored string. However, no string can be stored with XY, so a query with XY gets a negative answer to the test for matching 😭

X is assigned to MN. In newVersion, X is normalized to code point nX, and therefore X is now in category MN. This can't exist in any stored string, so any query containing X gets a negative answer to the test for matching. Note, though, that if the query had contained the letter nX, it would have positively matched 🧐
X is assigned to D. In newVersion, X is in category D. This can't exist in any stored string, so any query containing X gets a negative answer to the test for matching 🚫

In none of these cases does the query get data for a stored string other than the one it actually tried to match against. Zero leaks, all vibes 🦋

Profiles are stable between versions in the following sense: If a string S has been prepared using newVersion, then it will not change if it's subsequently prepared using oldVersion 💜

7.3 Versions of applications and stored strings

Here's another way to see that this versioning system works: compare what happens when an application uses a newer or an older version of a profile 🔄

Newer query application: Suppose a querying application is using newVersion, and the stored string was created using oldVersion. This case is simple. There won't be any characters in the stored string that the application can't query, because the new profile uses a superset of the code points used to make the stored string 🌟

Newer stored string: Suppose a querying application is using oldVersion, and the stored string was created using a profile that uses newVersion. Because the querying application let unassigned code points pass through, the user can query on stored strings that use code points from newVersion. No stored string can have code points that are unassigned in newVersion, since that's illegal. To get a match, the querying application has to enter the unassigned code points in the proper order, and those code points have to make it through both the mapping and the normalization steps. Main character energy, but it takes effort 💅

8. References

8.1 Normative references ✨

Okay bestie, these are the normative references, the ones you actually need to go read. 📚

[UAX15] Mark Davis and Martin Duerst. Unicode Standard Annex #15: Unicode Normalization Forms, Version 3.2.0. http://www.unicode.org/unicode/reports/tr15/tr15-22.html.

[Unicode3.2] The Unicode Consortium. The Unicode Standard, Version 3.2.0 is defined by The Unicode Standard, Version 3.0 (Reading, MA, Addison-Wesley, 2000. ISBN 0-201-61633-5), as amended by the Unicode Standard Annex #27: Unicode 3.1 (http://www.unicode.org/reports/tr27/) and by the Unicode Standard Annex #28: Unicode 3.2 (http://www.unicode.org/reports/tr28/).

[RFC2119] Bradner, S., "Key words for use in RFCs to Indicate Requirement Levels", BCP 14, RFC 2119, March 1997.

8.2 Informative references 🌸

These are the extra reading that's nice to have but not required. 🧠

[CharModel] Unicode Technical Report;17, Character Encoding Model. http://www.unicode.org/unicode/reports/tr17/.

[Glossary] Unicode Glossary, http://www.unicode.org/glossary/.

[ISO10646] ISO/IEC, "Information Technology - Universal Multiple-Octet Coded Character Set (UCS) - Part 1: Architecture and Basic Multilingual Plane", ISO/IEC 10646-1:2000, October 2000.

[RFC2434] Narten, T. and H. Alvestrand, "Guidelines for IANA Considerations", BCP 26, RFC 2434, October 1998.

[UAX9] The Unicode Consortium. Unicode Standard Annex #9, The Bidirectional Algorithm, http://www.unicode.org/unicode/reports/tr9/.

[UTR21] Mark Davis. Case Mappings. Unicode Technical Report 21. http://www.unicode.org/unicode/reports/tr21/.

9. Security Considerations 🔐

Okay this part is SERIOUS, so pay attention 💀. Stringprep is used with Unicode characters, which means there are security issues that are specific to stringprep and others that come with using Unicode at all.

9.1 Stringprep-specific security considerations 👀

The Unicode and ISO/IEC 10646 repertoires have so many characters that look alike. In lots of cases, users of security protocols do visual matching, like when they compare the names of trusted third parties. Because it is impossible to map similar-looking characters without a great deal of context (like knowing which fonts are used), stringprep does nothing to map similar-looking characters together, nor does it prohibit some characters just because they look like others. User applications can help sort out some of the similar-looking characters by showing the user when a string changes between scripts. 🫶

Most profiles of stringprep can cause changes in the strings that are input to stringprep. Because of this, protocols that have sets of non-allowed characters or sequences MUST check for the non-allowed characters or sequences after the stringprep processing. 🚨

This document does not mandate the checking of bidirectional characters in section 6. If the requirements in section 6 are not used in a profile of stringprep, it is easy to create many strings whose characters are in different order but are displayed identically. This can cause security-related user confusion, similar to the look-alike characters described above. 😵‍💫

Stringprep does not do anything to assure that any algorithms translating characters from non-Unicode into Unicode produce the same output in all implementations. 🙅‍♀️

Some Unicode codepoints are invisible. Protocols that allow these characters (that is, do not map them out or prohibit them in stringprep) can cause users confusion when two identical-looking strings do not match. 🫥

9.2 Generic Unicode security considerations 🧩

Using Unicode characters explicitly forces applications to use multi-octet characters. Converting an application from one that uses single-octet characters to one that uses multi-octet characters must be done very carefully, particularly in an application that checks for values of characters or sorts characters. 🥹

Protocols that use stringprep usually also use encodings of Unicode, such as UTF-8 or UTF-16. Some applications using those encodings have been known to not check for illegal or ill-formed sequences in the encodings, and so they have not detected sequences of octets that would have been detected if they used just ASCII. For example, in UTF-8 the octet sequence "0xC0 0xAB" is an illegal formation of U+002B (plus sign). All programs should reject any string that is an illegal or ill-formed octet sequence for the encoding being used. 😤

Both Unicode normalization and conversion between Unicode encodings can cause strings to grow or shrink. Programs that used fixed-size buffers, or that make assumptions that buffers will always be greater than or less than particular sizes, are likely to fail in insecure fashions when using Unicode normalization or encoding conversions. 💥

Covering an extensive list of security threats and considerations on the use of current and future versions of Unicode is outside of the scope of this document. 🙈

10. IANA Considerations 📋

Stringprep profiles MUST have IETF consensus as described in [RFC2434]. Each profile MUST be reviewed by the IESG before it is registered. The IESG MAY change a profile before registration. 🎀

IANA has set up a registry of stringprep profiles. This registry is a single text file that lists the known profiles. Each entry in the registry has three fields:

Profile name
RFC in which the profile is defined
Indicator whether or not this is the newest version of the profile

Each version of a profile will remain listed in the registry forever. That is, if a new version of a profile supersedes an earlier version, both versions will continue to be listed in the registry, but the current version indicator will be turned off for the earlier version and turned on for the newer version. 🗂️

It is probably harmful if a large number of profiles of stringprep proliferate. Therefore, the IESG may reject proposals for new profiles and instead suggest that protocols reuse existing profiles. 🙅‍♀️✨

11. Acknowledgements 🫶

Many people from the IETF IDN Working Group and the Unicode Technical Committee contributed ideas that went into the first document of this document. Mark Davis and Patrik Faltstrom were particularly helpful with some of the ideas, such as the versioning description. 💜

The IDN nameprep design team made many useful changes to the first document. That team and its advisors include:

Asmus Freytag Cathy Wissink Francois Yergeau James Seng Marc Blanchet Mark Davis Martin Duerst Patrik Faltstrom Paul Hoffman

Additional significant improvements were proposed by:

Jonathan Rosenne Kent Karlsson Scott Hollenbeck Dave Crocker Erik Nordmark Matitiahu Allouche

A. Unicode repertoires 🌈

The following is the only repertoire covered in this document:

Unicode 3.2, as defined in [Unicode3.2].

A.1 Unassigned code points in Unicode 3.2 🧚

Here's the whole unassigned list, bestie, copied exactly as it is 🍓

----- Start Table A.1 -----
0221
0234-024F
02AE-02AF
02EF-02FF
0350-035F
0370-0373
0376-0379
037B-037D
037F-0383
038B
038D
03A2
03CF
03F7-03FF
0487
04CF
04F6-04F7
04FA-04FF
0510-0530
0557-0558
0560
0588
058B-0590
05A2
05BA
05C5-05CF
05EB-05EF
05F5-060B
060D-061A
061C-061E
0620
063B-063F
0656-065F
06EE-06EF
06FF
070E
072D-072F
074B-077F
07B2-0900
0904
093A-093B
094E-094F
0955-0957
0971-0980
0984
098D-098E
0991-0992
09A9
09B1
09B3-09B5
09BA-09BB
09BD
09C5-09C6
09C9-09CA
09CE-09D6
09D8-09DB
09DE
09E4-09E5
09FB-0A01
0A03-0A04
0A0B-0A0E
0A11-0A12
0A29
0A31
0A34
0A37
0A3A-0A3B
0A3D
0A43-0A46
0A49-0A4A
0A4E-0A58
0A5D
0A5F-0A65
0A75-0A80
0A84
0A8C
0A8E
0A92
0AA9
0AB1
0AB4
0ABA-0ABB
0AC6
0ACA
0ACE-0ACF
0AD1-0ADF
0AE1-0AE5
0AF0-0B00
0B04
0B0D-0B0E
0B11-0B12
0B29
0B31
0B34-0B35
0B3A-0B3B
0B44-0B46
0B49-0B4A
0B4E-0B55
0B58-0B5B
0B5E
0B62-0B65
0B71-0B81
0B84
0B8B-0B8D
0B91
0B96-0B98
0B9B
0B9D
0BA0-0BA2
0BA5-0BA7
0BAB-0BAD
0BB6
0BBA-0BBD
0BC3-0BC5
0BC9
0BCE-0BD6
0BD8-0BE6
0BF3-0C00
0C04
0C0D
0C11
0C29
0C34
0C3A-0C3D
0C45
0C49
0C4E-0C54
0C57-0C5F
0C62-0C65
0C70-0C81
0C84
0C8D
0C91
0CA9
0CB4
0CBA-0CBD
0CC5
0CC9
0CCE-0CD4
0CD7-0CDD
0CDF
0CE2-0CE5
0CF0-0D01
0D04
0D0D
0D11
0D29
0D3A-0D3D
0D44-0D45
0D49
0D4E-0D56
0D58-0D5F
0D62-0D65
0D70-0D81
0D84
0D97-0D99
0DB2
0DBC
0DBE-0DBF
0DC7-0DC9
0DCB-0DCE
0DD5
0DD7
0DE0-0DF1
0DF5-0E00
0E3B-0E3E
0E5C-0E80
0E83
0E85-0E86
0E89
0E8B-0E8C
0E8E-0E93
0E98
0EA0
0EA4
0EA6
0EA8-0EA9
0EAC
0EBA
0EBE-0EBF
0EC5
0EC7
0ECE-0ECF
0EDA-0EDB
0EDE-0EFF
0F48
0F6B-0F70
0F8C-0F8F
0F98
0FBD
0FCD-0FCE
0FD0-0FFF
1022
1028
102B
1033-1035
103A-103F
105A-109F
10C6-10CF
10F9-10FA
10FC-10FF
115A-115E
11A3-11A7
11FA-11FF
1207
1247
1249
124E-124F
1257
1259
125E-125F
1287
1289
128E-128F
12AF
12B1
12B6-12B7
12BF
12C1
12C6-12C7
12CF
12D7
12EF
130F
1311
1316-1317
131F
1347
135B-1360
137D-139F
13F5-1400
1677-167F
169D-169F
16F1-16FF
170D
1715-171F
1737-173F
1754-175F
176D
1771
1774-177F
17DD-17DF
17EA-17FF
180F
181A-181F
1878-187F
18AA-1DFF
1E9C-1E9F
1EFA-1EFF
1F16-1F17
1F1E-1F1F
1F46-1F47
1F4E-1F4F
1F58
1F5A
1F5C
1F5E
1F7E-1F7F
1FB5
1FC5
1FD4-1FD5
1FDC
1FF0-1FF1
1FF5
1FFF
2053-2056
2058-205E
2064-2069
2072-2073
208F-209F
20B2-20CF
20EB-20FF
213B-213C
214C-2152
2184-218F
23CF-23FF
2427-243F
244B-245F
24FF
2614-2615
2618
267E-267F
268A-2700
2705
270A-270B
2728
274C
274E
2753-2755
2757
275F-2760
2795-2797
27B0
27BF-27CF
27EC-27EF
2B00-2E7F
2E9A
2EF4-2EFF
2FD6-2FEF
2FFC-2FFF
3040
3097-3098
3100-3104
312D-3130
318F
31B8-31EF
321D-321F
3244-3250
327C-327E
32CC-32CF
32FF
3377-337A
33DE-33DF
33FF
4DB6-4DFF
9FA6-9FFF
A48D-A48F
A4C7-ABFF
D7A4-D7FF
FA2E-FA2F
FA6B-FAFF
FB07-FB12
FB18-FB1C
FB37
FB3D
FB3F
FB42
FB45
FBB2-FBD2
FD40-FD4F
FD90-FD91
FDC8-FDCF
FDFD-FDFF
FE10-FE1F
FE24-FE2F
FE47-FE48
FE53
FE67
FE6C-FE6F
FE75
FEFD-FEFE
FF00
FFBF-FFC1
FFC8-FFC9
FFD0-FFD1
FFD8-FFD9
FFDD-FFDF
FFE7
FFEF-FFF8
10000-102FF
1031F
10324-1032F
1034B-103FF
10426-10427
1044E-1CFFF
1D0F6-1D0FF
1D127-1D129
1D1DE-1D3FF
1D455
1D49D
1D4A0-1D4A1
1D4A3-1D4A4
1D4A7-1D4A8
1D4AD
1D4BA
1D4BC
1D4C1
1D4C4
1D506
1D50B-1D50C
1D515
1D51D
1D53A
1D53F
1D545
1D547-1D549
1D551
1D6A4-1D6A7
1D7CA-1D7CD
1D800-1FFFD
2A6D7-2F7FF
2FA1E-2FFFD
30000-3FFFD
40000-4FFFD
50000-5FFFD
60000-6FFFD
70000-7FFFD
80000-8FFFD
90000-9FFFD
A0000-AFFFD
B0000-BFFFD
C0000-CFFFD
D0000-DFFFD
E0000
E0002-E001F
E0080-EFFFD
----- End Table A.1 -----

B. Mapping Tables ✨

okay so Appendix B is where the actual lookup tables live 🗂️💖 It's the mapping table from section 3, and each row has three columns: the code point being mapped from, the zero or more code points it gets mapped to, and the reason for the mapping 🧚 The columns are separated by semicolons. The second column can be empty, hold one code point, or hold more than one, with a space between each one 🫶

B.1 Commonly mapped to nothing 🍓

----- Start Table B.1 -----
00AD; ; Map to nothing
034F; ; Map to nothing
1806; ; Map to nothing
180B; ; Map to nothing
180C; ; Map to nothing
180D; ; Map to nothing
200B; ; Map to nothing
200C; ; Map to nothing
200D; ; Map to nothing
2060; ; Map to nothing
FE00; ; Map to nothing
FE01; ; Map to nothing
FE02; ; Map to nothing
FE03; ; Map to nothing
FE04; ; Map to nothing
FE05; ; Map to nothing
FE06; ; Map to nothing
FE07; ; Map to nothing
FE08; ; Map to nothing
FE09; ; Map to nothing
FE0A; ; Map to nothing
FE0B; ; Map to nothing
FE0C; ; Map to nothing
FE0D; ; Map to nothing
FE0E; ; Map to nothing
FE0F; ; Map to nothing
FEFF; ; Map to nothing
----- End Table B.1 -----

B.2 Mapping for case-folding used with NFKC 🌸

Okay bestie, the case-folding table keeps going 💅✨ Every row is a little "this letter becomes that letter" swap, and the code block below keeps the exact original formatting so nothing gets lost. 🦋

   ----- Start Table B.2 -----
   0041; 0061; Case map
   0042; 0062; Case map
   0043; 0063; Case map
   0044; 0064; Case map
   0045; 0065; Case map
   0046; 0066; Case map
   0047; 0067; Case map
   0048; 0068; Case map
   0049; 0069; Case map
   004A; 006A; Case map
   004B; 006B; Case map
   004C; 006C; Case map
   004D; 006D; Case map
   004E; 006E; Case map
   004F; 006F; Case map
   0050; 0070; Case map
   0051; 0071; Case map
   0052; 0072; Case map
   0053; 0073; Case map
   0054; 0074; Case map
   0055; 0075; Case map
   0056; 0076; Case map
   0057; 0077; Case map
   0058; 0078; Case map
   0059; 0079; Case map
   005A; 007A; Case map
   00B5; 03BC; Case map
   00C0; 00E0; Case map
   00C1; 00E1; Case map
   00C2; 00E2; Case map
   00C3; 00E3; Case map
   00C4; 00E4; Case map
   00C5; 00E5; Case map
   00C6; 00E6; Case map
   00C7; 00E7; Case map
   00C8; 00E8; Case map
   00C9; 00E9; Case map
   00CA; 00EA; Case map
   00CB; 00EB; Case map
   00CC; 00EC; Case map
   00CD; 00ED; Case map
   00CE; 00EE; Case map
   00CF; 00EF; Case map
   00D0; 00F0; Case map
   00D1; 00F1; Case map
   00D2; 00F2; Case map
   00D3; 00F3; Case map
   00D4; 00F4; Case map
   00D5; 00F5; Case map
   00D6; 00F6; Case map
   00D8; 00F8; Case map
   00D9; 00F9; Case map
   00DA; 00FA; Case map
   00DB; 00FB; Case map
   00DC; 00FC; Case map
   00DD; 00FD; Case map
   00DE; 00FE; Case map
   00DF; 0073 0073; Case map
   0100; 0101; Case map
   0102; 0103; Case map
   0104; 0105; Case map
   0106; 0107; Case map
   0108; 0109; Case map
   010A; 010B; Case map
   010C; 010D; Case map
   010E; 010F; Case map
   0110; 0111; Case map
   0112; 0113; Case map
   0114; 0115; Case map
   0116; 0117; Case map
   0118; 0119; Case map
   011A; 011B; Case map
   011C; 011D; Case map
   011E; 011F; Case map
   0120; 0121; Case map
   0122; 0123; Case map
   0124; 0125; Case map
   0126; 0127; Case map
   0128; 0129; Case map
   012A; 012B; Case map
   012C; 012D; Case map
   012E; 012F; Case map
   0130; 0069 0307; Case map
   0132; 0133; Case map
   0134; 0135; Case map
   0136; 0137; Case map
   0139; 013A; Case map
   013B; 013C; Case map
   013D; 013E; Case map
   013F; 0140; Case map
   0141; 0142; Case map
   0143; 0144; Case map
   0145; 0146; Case map
   0147; 0148; Case map
   0149; 02BC 006E; Case map
   014A; 014B; Case map
   014C; 014D; Case map
   014E; 014F; Case map
   0150; 0151; Case map
   0152; 0153; Case map
   0154; 0155; Case map
   0156; 0157; Case map
   0158; 0159; Case map
   015A; 015B; Case map
   015C; 015D; Case map
   015E; 015F; Case map
   0160; 0161; Case map
   0162; 0163; Case map
   0164; 0165; Case map
   0166; 0167; Case map
   0168; 0169; Case map
   016A; 016B; Case map
   016C; 016D; Case map
   016E; 016F; Case map
   0170; 0171; Case map
   0172; 0173; Case map
   0174; 0175; Case map
   0176; 0177; Case map
   0178; 00FF; Case map
   0179; 017A; Case map
   017B; 017C; Case map
   017D; 017E; Case map
   017F; 0073; Case map
   0181; 0253; Case map
   0182; 0183; Case map
   0184; 0185; Case map
   0186; 0254; Case map
   0187; 0188; Case map
   0189; 0256; Case map
   018A; 0257; Case map
   018B; 018C; Case map
   018E; 01DD; Case map
   018F; 0259; Case map
   0190; 025B; Case map
   0191; 0192; Case map
   0193; 0260; Case map
   0194; 0263; Case map
   0196; 0269; Case map
   0197; 0268; Case map
   0198; 0199; Case map
   019C; 026F; Case map
   019D; 0272; Case map
   019F; 0275; Case map
   01A0; 01A1; Case map
   01A2; 01A3; Case map
   01A4; 01A5; Case map
   01A6; 0280; Case map
   01A7; 01A8; Case map
   01A9; 0283; Case map
   01AC; 01AD; Case map
   01AE; 0288; Case map
   01AF; 01B0; Case map
   01B1; 028A; Case map
   01B2; 028B; Case map
   01B3; 01B4; Case map
   01B5; 01B6; Case map
   01B7; 0292; Case map
   01B8; 01B9; Case map
   01BC; 01BD; Case map
   01C4; 01C6; Case map
   01C5; 01C6; Case map
   01C7; 01C9; Case map
   01C8; 01C9; Case map
   01CA; 01CC; Case map
   01CB; 01CC; Case map
   01CD; 01CE; Case map
   01CF; 01D0; Case map
   01D1; 01D2; Case map
   01D3; 01D4; Case map
   01D5; 01D6; Case map
   01D7; 01D8; Case map
   01D9; 01DA; Case map
   01DB; 01DC; Case map
   01DE; 01DF; Case map
   01E0; 01E1; Case map
   01E2; 01E3; Case map
   01E4; 01E5; Case map
   01E6; 01E7; Case map
   01E8; 01E9; Case map
   01EA; 01EB; Case map
   01EC; 01ED; Case map
   01EE; 01EF; Case map
   01F0; 006A 030C; Case map
   01F1; 01F3; Case map
   01F2; 01F3; Case map
   01F4; 01F5; Case map
   01F6; 0195; Case map
   01F7; 01BF; Case map
   01F8; 01F9; Case map
   01FA; 01FB; Case map
   01FC; 01FD; Case map
   01FE; 01FF; Case map
   0200; 0201; Case map
   0202; 0203; Case map
   0204; 0205; Case map
   0206; 0207; Case map
   0208; 0209; Case map
   020A; 020B; Case map
   020C; 020D; Case map
   020E; 020F; Case map
   0210; 0211; Case map
   0212; 0213; Case map
   0214; 0215; Case map
   0216; 0217; Case map
   0218; 0219; Case map
   021A; 021B; Case map
   021C; 021D; Case map
   021E; 021F; Case map
   0220; 019E; Case map
   0222; 0223; Case map
   0224; 0225; Case map
   0226; 0227; Case map
   0228; 0229; Case map
   022A; 022B; Case map
   022C; 022D; Case map
   022E; 022F; Case map
   0230; 0231; Case map
   0232; 0233; Case map
   0345; 03B9; Case map
   037A; 0020 03B9; Additional folding
   0386; 03AC; Case map
   0388; 03AD; Case map
   0389; 03AE; Case map
   038A; 03AF; Case map
   038C; 03CC; Case map
   038E; 03CD; Case map
   038F; 03CE; Case map
   0390; 03B9 0308 0301; Case map
   0391; 03B1; Case map
   0392; 03B2; Case map
   0393; 03B3; Case map
   0394; 03B4; Case map
   0395; 03B5; Case map
   0396; 03B6; Case map
   0397; 03B7; Case map
   0398; 03B8; Case map
   0399; 03B9; Case map
   039A; 03BA; Case map
   039B; 03BB; Case map
   039C; 03BC; Case map
   039D; 03BD; Case map
   039E; 03BE; Case map
   039F; 03BF; Case map
   03A0; 03C0; Case map
   03A1; 03C1; Case map
   03A3; 03C3; Case map
   03A4; 03C4; Case map
   03A5; 03C5; Case map
   03A6; 03C6; Case map
   03A7; 03C7; Case map
   03A8; 03C8; Case map
   03A9; 03C9; Case map
   03AA; 03CA; Case map
   03AB; 03CB; Case map
   03B0; 03C5 0308 0301; Case map
   03C2; 03C3; Case map
   03D0; 03B2; Case map
   03D1; 03B8; Case map
   03D2; 03C5; Additional folding
   03D3; 03CD; Additional folding
   03D4; 03CB; Additional folding
   03D5; 03C6; Case map
   03D6; 03C0; Case map
   03D8; 03D9; Case map
   03DA; 03DB; Case map
   03DC; 03DD; Case map
   03DE; 03DF; Case map
   03E0; 03E1; Case map
   03E2; 03E3; Case map
   03E4; 03E5; Case map
   03E6; 03E7; Case map
   03E8; 03E9; Case map
   03EA; 03EB; Case map
   03EC; 03ED; Case map
   03EE; 03EF; Case map
   03F0; 03BA; Case map
   03F1; 03C1; Case map
   03F2; 03C3; Case map
   03F4; 03B8; Case map
   03F5; 03B5; Case map
   0400; 0450; Case map
   0401; 0451; Case map
   0402; 0452; Case map
   0403; 0453; Case map
   0404; 0454; Case map
   0405; 0455; Case map
   0406; 0456; Case map
   0407; 0457; Case map
   0408; 0458; Case map
   0409; 0459; Case map
   040A; 045A; Case map
   040B; 045B; Case map
   040C; 045C; Case map
   040D; 045D; Case map
   040E; 045E; Case map
   040F; 045F; Case map
   0410; 0430; Case map
   0411; 0431; Case map
   0412; 0432; Case map
   0413; 0433; Case map
   0414; 0434; Case map
   0415; 0435; Case map
   0416; 0436; Case map
   0417; 0437; Case map
   0418; 0438; Case map
   0419; 0439; Case map
   041A; 043A; Case map
   041B; 043B; Case map
   041C; 043C; Case map
   041D; 043D; Case map
   041E; 043E; Case map
   041F; 043F; Case map
   0420; 0440; Case map
   0421; 0441; Case map
   0422; 0442; Case map
   0423; 0443; Case map
   0424; 0444; Case map
   0425; 0445; Case map
   0426; 0446; Case map
   0427; 0447; Case map
   0428; 0448; Case map
   0429; 0449; Case map
   042A; 044A; Case map
   042B; 044B; Case map
   042C; 044C; Case map
   042D; 044D; Case map
   042E; 044E; Case map
   042F; 044F; Case map
   0460; 0461; Case map
   0462; 0463; Case map
   0464; 0465; Case map
   0466; 0467; Case map
   0468; 0469; Case map
   046A; 046B; Case map
   046C; 046D; Case map
   046E; 046F; Case map
   0470; 0471; Case map
   0472; 0473; Case map
   0474; 0475; Case map
   0476; 0477; Case map
   0478; 0479; Case map
   047A; 047B; Case map
   047C; 047D; Case map
   047E; 047F; Case map
   0480; 0481; Case map
   048A; 048B; Case map
   048C; 048D; Case map
   048E; 048F; Case map
   0490; 0491; Case map
   0492; 0493; Case map
   0494; 0495; Case map
   0496; 0497; Case map
   0498; 0499; Case map
   049A; 049B; Case map
   049C; 049D; Case map
   049E; 049F; Case map
   04A0; 04A1; Case map
   04A2; 04A3; Case map
   04A4; 04A5; Case map
   04A6; 04A7; Case map
   04A8; 04A9; Case map
   04AA; 04AB; Case map
   04AC; 04AD; Case map
   04AE; 04AF; Case map
   04B0; 04B1; Case map
   04B2; 04B3; Case map
   04B4; 04B5; Case map
   04B6; 04B7; Case map
   04B8; 04B9; Case map
   04BA; 04BB; Case map
   04BC; 04BD; Case map
   04BE; 04BF; Case map
   04C1; 04C2; Case map
   04C3; 04C4; Case map
   04C5; 04C6; Case map
   04C7; 04C8; Case map
   04C9; 04CA; Case map
   04CB; 04CC; Case map
   04CD; 04CE; Case map
   04D0; 04D1; Case map
   04D2; 04D3; Case map
   04D4; 04D5; Case map
   04D6; 04D7; Case map
   04D8; 04D9; Case map
   04DA; 04DB; Case map
   04DC; 04DD; Case map
   04DE; 04DF; Case map
   04E0; 04E1; Case map
   04E2; 04E3; Case map
   04E4; 04E5; Case map
   04E6; 04E7; Case map
   04E8; 04E9; Case map
   04EA; 04EB; Case map
   04EC; 04ED; Case map
   04EE; 04EF; Case map
   04F0; 04F1; Case map
   04F2; 04F3; Case map
   04F4; 04F5; Case map
   04F8; 04F9; Case map
   0500; 0501; Case map
   0502; 0503; Case map
   0504; 0505; Case map
   0506; 0507; Case map
   0508; 0509; Case map
   050A; 050B; Case map
   050C; 050D; Case map
   050E; 050F; Case map
   0531; 0561; Case map
   0532; 0562; Case map
   0533; 0563; Case map
   0534; 0564; Case map
   0535; 0565; Case map
   0536; 0566; Case map
   0537; 0567; Case map
   0538; 0568; Case map
   0539; 0569; Case map
   053A; 056A; Case map
   053B; 056B; Case map
   053C; 056C; Case map
   053D; 056D; Case map
   053E; 056E; Case map
   053F; 056F; Case map
   0540; 0570; Case map
   0541; 0571; Case map
   0542; 0572; Case map
   0543; 0573; Case map
   0544; 0574; Case map
   0545; 0575; Case map
   0546; 0576; Case map
   0547; 0577; Case map
   0548; 0578; Case map
   0549; 0579; Case map
   054A; 057A; Case map
   054B; 057B; Case map
   054C; 057C; Case map
   054D; 057D; Case map
   054E; 057E; Case map
   054F; 057F; Case map
   0550; 0580; Case map
   0551; 0581; Case map
   0552; 0582; Case map
   0553; 0583; Case map
   0554; 0584; Case map
   0555; 0585; Case map
   0556; 0586; Case map
   0587; 0565 0582; Case map
   1E00; 1E01; Case map
   1E02; 1E03; Case map
   1E04; 1E05; Case map
   1E06; 1E07; Case map
   1E08; 1E09; Case map
   1E0A; 1E0B; Case map
   1E0C; 1E0D; Case map
   1E0E; 1E0F; Case map
   1E10; 1E11; Case map
   1E12; 1E13; Case map
   1E14; 1E15; Case map
   1E16; 1E17; Case map
   1E18; 1E19; Case map
   1E1A; 1E1B; Case map
   1E1C; 1E1D; Case map
   1E1E; 1E1F; Case map
   1E20; 1E21; Case map
   1E22; 1E23; Case map
   1E24; 1E25; Case map
   1E26; 1E27; Case map
   1E28; 1E29; Case map
   1E2A; 1E2B; Case map
   1E2C; 1E2D; Case map
   1E2E; 1E2F; Case map
   1E30; 1E31; Case map
   1E32; 1E33; Case map
   1E34; 1E35; Case map
   1E36; 1E37; Case map
   1E38; 1E39; Case map
   1E3A; 1E3B; Case map
   1E3C; 1E3D; Case map
   1E3E; 1E3F; Case map
   1E40; 1E41; Case map
   1E42; 1E43; Case map
   1E44; 1E45; Case map
   1E46; 1E47; Case map
   1E48; 1E49; Case map
   1E4A; 1E4B; Case map
   1E4C; 1E4D; Case map
   1E4E; 1E4F; Case map
   1E50; 1E51; Case map
   1E52; 1E53; Case map
   1E54; 1E55; Case map
   1E56; 1E57; Case map
   1E58; 1E59; Case map
   1E5A; 1E5B; Case map
   1E5C; 1E5D; Case map
   1E5E; 1E5F; Case map

Table B.2 keeps going in the next part, so stay tuned 🧚💜

1E60; 1E61; Case map 1E62; 1E63; Case map 1E64; 1E65; Case map 1E66; 1E67; Case map 1E68; 1E69; Case map 1E6A; 1E6B; Case map 1E6C; 1E6D; Case map 1E6E; 1E6F; Case map 1E70; 1E71; Case map 1E72; 1E73; Case map 1E74; 1E75; Case map 1E76; 1E77; Case map 1E78; 1E79; Case map 1E7A; 1E7B; Case map 1E7C; 1E7D; Case map 1E7E; 1E7F; Case map 1E80; 1E81; Case map 1E82; 1E83; Case map 1E84; 1E85; Case map 1E86; 1E87; Case map 1E88; 1E89; Case map 1E8A; 1E8B; Case map 1E8C; 1E8D; Case map 1E8E; 1E8F; Case map 1E90; 1E91; Case map 1E92; 1E93; Case map 1E94; 1E95; Case map 1E96; 0068 0331; Case map 1E97; 0074 0308; Case map 1E98; 0077 030A; Case map 1E99; 0079 030A; Case map 1E9A; 0061 02BE; Case map 1E9B; 1E61; Case map 1EA0; 1EA1; Case map 1EA2; 1EA3; Case map 1EA4; 1EA5; Case map 1EA6; 1EA7; Case map 1EA8; 1EA9; Case map 1EAA; 1EAB; Case map 1EAC; 1EAD; Case map 1EAE; 1EAF; Case map 1EB0; 1EB1; Case map 1EB2; 1EB3; Case map 1EB4; 1EB5; Case map 1EB6; 1EB7; Case map 1EB8; 1EB9; Case map 1EBA; 1EBB; Case map 1EBC; 1EBD; Case map 1EBE; 1EBF; Case map 1EC0; 1EC1; Case map 1EC2; 1EC3; Case map 1EC4; 1EC5; Case map 1EC6; 1EC7; Case map 1EC8; 1EC9; Case map 1ECA; 1ECB; Case map 1ECC; 1ECD; Case map 1ECE; 1ECF; Case map 1ED0; 1ED1; Case map 1ED2; 1ED3; Case map 1ED4; 1ED5; Case map 1ED6; 1ED7; Case map 1ED8; 1ED9; Case map 1EDA; 1EDB; Case map 1EDC; 1EDD; Case map 1EDE; 1EDF; Case map 1EE0; 1EE1; Case map 1EE2; 1EE3; Case map 1EE4; 1EE5; Case map 1EE6; 1EE7; Case map 1EE8; 1EE9; Case map 1EEA; 1EEB; Case map 1EEC; 1EED; Case map 1EEE; 1EEF; Case map 1EF0; 1EF1; Case map 1EF2; 1EF3; Case map 1EF4; 1EF5; Case map 1EF6; 1EF7; Case map 1EF8; 1EF9; Case map 1F08; 1F00; Case map 1F09; 1F01; Case map 1F0A; 1F02; Case map 1F0B; 1F03; Case map 1F0C; 1F04; Case map 1F0D; 1F05; Case map 1F0E; 1F06; Case map 1F0F; 1F07; Case map 1F18; 1F10; Case map 1F19; 1F11; Case map 1F1A; 1F12; Case map 1F1B; 1F13; Case map 1F1C; 1F14; Case map 1F1D; 1F15; Case map 1F28; 1F20; Case map 1F29; 1F21; Case map 1F2A; 1F22; Case map 1F2B; 1F23; Case map 1F2C; 1F24; Case map 1F2D; 1F25; Case map 1F2E; 1F26; Case map 1F2F; 1F27; Case map 1F38; 1F30; Case map 1F39; 1F31; Case map 1F3A; 1F32; Case map 1F3B; 1F33; Case map 1F3C; 1F34; Case map 1F3D; 1F35; Case map 1F3E; 1F36; Case map 1F3F; 1F37; Case map 1F48; 1F40; Case map 1F49; 1F41; Case map 1F4A; 1F42; Case map 1F4B; 1F43; Case map 1F4C; 1F44; Case map 1F4D; 1F45; Case map 1F50; 03C5 0313; Case map 1F52; 03C5 0313 0300; Case map 1F54; 03C5 0313 0301; Case map 1F56; 03C5 0313 0342; Case map 1F59; 1F51; Case map 1F5B; 1F53; Case map 1F5D; 1F55; Case map 1F5F; 1F57; Case map 1F68; 1F60; Case map 1F69; 1F61; Case map 1F6A; 1F62; Case map 1F6B; 1F63; Case map 1F6C; 1F64; Case map 1F6D; 1F65; Case map 1F6E; 1F66; Case map 1F6F; 1F67; Case map 1F80; 1F00 03B9; Case map 1F81; 1F01 03B9; Case map 1F82; 1F02 03B9; Case map 1F83; 1F03 03B9; Case map 1F84; 1F04 03B9; Case map 1F85; 1F05 03B9; Case map 1F86; 1F06 03B9; Case map 1F87; 1F07 03B9; Case map 1F88; 1F00 03B9; Case map 1F89; 1F01 03B9; Case map 1F8A; 1F02 03B9; Case map 1F8B; 1F03 03B9; Case map 1F8C; 1F04 03B9; Case map 1F8D; 1F05 03B9; Case map 1F8E; 1F06 03B9; Case map 1F8F; 1F07 03B9; Case map 1F90; 1F20 03B9; Case map 1F91; 1F21 03B9; Case map 1F92; 1F22 03B9; Case map 1F93; 1F23 03B9; Case map 1F94; 1F24 03B9; Case map 1F95; 1F25 03B9; Case map 1F96; 1F26 03B9; Case map 1F97; 1F27 03B9; Case map 1F98; 1F20 03B9; Case map 1F99; 1F21 03B9; Case map 1F9A; 1F22 03B9; Case map 1F9B; 1F23 03B9; Case map 1F9C; 1F24 03B9; Case map 1F9D; 1F25 03B9; Case map 1F9E; 1F26 03B9; Case map 1F9F; 1F27 03B9; Case map 1FA0; 1F60 03B9; Case map 1FA1; 1F61 03B9; Case map 1FA2; 1F62 03B9; Case map 1FA3; 1F63 03B9; Case map 1FA4; 1F64 03B9; Case map 1FA5; 1F65 03B9; Case map 1FA6; 1F66 03B9; Case map 1FA7; 1F67 03B9; Case map 1FA8; 1F60 03B9; Case map 1FA9; 1F61 03B9; Case map 1FAA; 1F62 03B9; Case map 1FAB; 1F63 03B9; Case map 1FAC; 1F64 03B9; Case map 1FAD; 1F65 03B9; Case map 1FAE; 1F66 03B9; Case map 1FAF; 1F67 03B9; Case map 1FB2; 1F70 03B9; Case map 1FB3; 03B1 03B9; Case map 1FB4; 03AC 03B9; Case map 1FB6; 03B1 0342; Case map 1FB7; 03B1 0342 03B9; Case map 1FB8; 1FB0; Case map 1FB9; 1FB1; Case map 1FBA; 1F70; Case map 1FBB; 1F71; Case map 1FBC; 03B1 03B9; Case map 1FBE; 03B9; Case map 1FC2; 1F74 03B9; Case map 1FC3; 03B7 03B9; Case map 1FC4; 03AE 03B9; Case map 1FC6; 03B7 0342; Case map 1FC7; 03B7 0342 03B9; Case map 1FC8; 1F72; Case map 1FC9; 1F73; Case map 1FCA; 1F74; Case map 1FCB; 1F75; Case map 1FCC; 03B7 03B9; Case map 1FD2; 03B9 0308 0300; Case map 1FD3; 03B9 0308 0301; Case map 1FD6; 03B9 0342; Case map 1FD7; 03B9 0308 0342; Case map 1FD8; 1FD0; Case map 1FD9; 1FD1; Case map 1FDA; 1F76; Case map 1FDB; 1F77; Case map 1FE2; 03C5 0308 0300; Case map 1FE3; 03C5 0308 0301; Case map 1FE4; 03C1 0313; Case map 1FE6; 03C5 0342; Case map 1FE7; 03C5 0308 0342; Case map 1FE8; 1FE0; Case map 1FE9; 1FE1; Case map 1FEA; 1F7A; Case map 1FEB; 1F7B; Case map 1FEC; 1FE5; Case map 1FF2; 1F7C 03B9; Case map 1FF3; 03C9 03B9; Case map 1FF4; 03CE 03B9; Case map 1FF6; 03C9 0342; Case map 1FF7; 03C9 0342 03B9; Case map 1FF8; 1F78; Case map 1FF9; 1F79; Case map 1FFA; 1F7C; Case map 1FFB; 1F7D; Case map 1FFC; 03C9 03B9; Case map 20A8; 0072 0073; Additional folding 2102; 0063; Additional folding 2103; 00B0 0063; Additional folding 2107; 025B; Additional folding 2109; 00B0 0066; Additional folding 210B; 0068; Additional folding 210C; 0068; Additional folding 210D; 0068; Additional folding 2110; 0069; Additional folding 2111; 0069; Additional folding 2112; 006C; Additional folding 2115; 006E; Additional folding 2116; 006E 006F; Additional folding 2119; 0070; Additional folding 211A; 0071; Additional folding 211B; 0072; Additional folding 211C; 0072; Additional folding 211D; 0072; Additional folding 2120; 0073 006D; Additional folding 2121; 0074 0065 006C; Additional folding 2122; 0074 006D; Additional folding 2124; 007A; Additional folding 2126; 03C9; Case map 2128; 007A; Additional folding 212A; 006B; Case map 212B; 00E5; Case map 212C; 0062; Additional folding 212D; 0063; Additional folding 2130; 0065; Additional folding 2131; 0066; Additional folding 2133; 006D; Additional folding 213E; 03B3; Additional folding 213F; 03C0; Additional folding 2145; 0064; Additional folding 2160; 2170; Case map 2161; 2171; Case map 2162; 2172; Case map 2163; 2173; Case map 2164; 2174; Case map 2165; 2175; Case map 2166; 2176; Case map 2167; 2177; Case map 2168; 2178; Case map 2169; 2179; Case map 216A; 217A; Case map 216B; 217B; Case map 216C; 217C; Case map 216D; 217D; Case map 216E; 217E; Case map 216F; 217F; Case map 24B6; 24D0; Case map 24B7; 24D1; Case map 24B8; 24D2; Case map 24B9; 24D3; Case map 24BA; 24D4; Case map 24BB; 24D5; Case map 24BC; 24D6; Case map 24BD; 24D7; Case map 24BE; 24D8; Case map 24BF; 24D9; Case map 24C0; 24DA; Case map 24C1; 24DB; Case map 24C2; 24DC; Case map 24C3; 24DD; Case map 24C4; 24DE; Case map 24C5; 24DF; Case map 24C6; 24E0; Case map 24C7; 24E1; Case map 24C8; 24E2; Case map 24C9; 24E3; Case map 24CA; 24E4; Case map 24CB; 24E5; Case map 24CC; 24E6; Case map 24CD; 24E7; Case map 24CE; 24E8; Case map 24CF; 24E9; Case map 3371; 0068 0070 0061; Additional folding 3373; 0061 0075; Additional folding 3375; 006F 0076; Additional folding 3380; 0070 0061; Additional folding 3381; 006E 0061; Additional folding 3382; 03BC 0061; Additional folding 3383; 006D 0061; Additional folding 3384; 006B 0061; Additional folding 3385; 006B 0062; Additional folding 3386; 006D 0062; Additional folding 3387; 0067 0062; Additional folding 338A; 0070 0066; Additional folding 338B; 006E 0066; Additional folding 338C; 03BC 0066; Additional folding 3390; 0068 007A; Additional folding 3391; 006B 0068 007A; Additional folding 3392; 006D 0068 007A; Additional folding 3393; 0067 0068 007A; Additional folding 3394; 0074 0068 007A; Additional folding 33A9; 0070 0061; Additional folding 33AA; 006B 0070 0061; Additional folding 33AB; 006D 0070 0061; Additional folding 33AC; 0067 0070 0061; Additional folding 33B4; 0070 0076; Additional folding 33B5; 006E 0076; Additional folding 33B6; 03BC 0076; Additional folding 33B7; 006D 0076; Additional folding 33B8; 006B 0076; Additional folding 33B9; 006D 0076; Additional folding 33BA; 0070 0077; Additional folding 33BB; 006E 0077; Additional folding 33BC; 03BC 0077; Additional folding 33BD; 006D 0077; Additional folding 33BE; 006B 0077; Additional folding 33BF; 006D 0077; Additional folding 33C0; 006B 03C9; Additional folding 33C1; 006D 03C9; Additional folding 33C3; 0062 0071; Additional folding 33C6; 0063 2215 006B 0067; Additional folding 33C7; 0063 006F 002E; Additional folding 33C8; 0064 0062; Additional folding 33C9; 0067 0079; Additional folding 33CB; 0068 0070; Additional folding 33CD; 006B 006B; Additional folding 33CE; 006B 006D; Additional folding 33D7; 0070 0068; Additional folding 33D9; 0070 0070 006D; Additional folding 33DA; 0070 0072; Additional folding 33DC; 0073 0076; Additional folding 33DD; 0077 0062; Additional folding FB00; 0066 0066; Case map FB01; 0066 0069; Case map FB02; 0066 006C; Case map FB03; 0066 0066 0069; Case map FB04; 0066 0066 006C; Case map FB05; 0073 0074; Case map FB06; 0073 0074; Case map FB13; 0574 0576; Case map FB14; 0574 0565; Case map FB15; 0574 056B; Case map FB16; 057E 0576; Case map FB17; 0574 056D; Case map FF21; FF41; Case map FF22; FF42; Case map FF23; FF43; Case map FF24; FF44; Case map FF25; FF45; Case map FF26; FF46; Case map FF27; FF47; Case map FF28; FF48; Case map FF29; FF49; Case map FF2A; FF4A; Case map FF2B; FF4B; Case map FF2C; FF4C; Case map FF2D; FF4D; Case map FF2E; FF4E; Case map FF2F; FF4F; Case map FF30; FF50; Case map FF31; FF51; Case map FF32; FF52; Case map FF33; FF53; Case map FF34; FF54; Case map FF35; FF55; Case map FF36; FF56; Case map FF37; FF57; Case map FF38; FF58; Case map FF39; FF59; Case map FF3A; FF5A; Case map 10400; 10428; Case map 10401; 10429; Case map 10402; 1042A; Case map 10403; 1042B; Case map 10404; 1042C; Case map 10405; 1042D; Case map 10406; 1042E; Case map 10407; 1042F; Case map 10408; 10430; Case map 10409; 10431; Case map 1040A; 10432; Case map 1040B; 10433; Case map 1040C; 10434; Case map 1040D; 10435; Case map 1040E; 10436; Case map 1040F; 10437; Case map 10410; 10438; Case map 10411; 10439; Case map 10412; 1043A; Case map 10413; 1043B; Case map 10414; 1043C; Case map 10415; 1043D; Case map 10416; 1043E; Case map 10417; 1043F; Case map 10418; 10440; Case map 10419; 10441; Case map 1041A; 10442; Case map 1041B; 10443; Case map 1041C; 10444; Case map 1041D; 10445; Case map 1041E; 10446; Case map 1041F; 10447; Case map 10420; 10448; Case map 10421; 10449; Case map

Okay bestie, the case-folding table is still going strong, so here's the next batch 🎀✨

   10422; 1044A; Case map
   10423; 1044B; Case map
   10424; 1044C; Case map
   10425; 1044D; Case map
   1D400; 0061; Additional folding
   1D401; 0062; Additional folding
   1D402; 0063; Additional folding
   1D403; 0064; Additional folding
   1D404; 0065; Additional folding
   1D405; 0066; Additional folding
   1D406; 0067; Additional folding
   1D407; 0068; Additional folding
   1D408; 0069; Additional folding
   1D409; 006A; Additional folding
   1D40A; 006B; Additional folding
   1D40B; 006C; Additional folding
   1D40C; 006D; Additional folding
   1D40D; 006E; Additional folding
   1D40E; 006F; Additional folding
   1D40F; 0070; Additional folding
   1D410; 0071; Additional folding
   1D411; 0072; Additional folding
   1D412; 0073; Additional folding
   1D413; 0074; Additional folding
   1D414; 0075; Additional folding
   1D415; 0076; Additional folding
   1D416; 0077; Additional folding
   1D417; 0078; Additional folding
   1D418; 0079; Additional folding
   1D419; 007A; Additional folding
   1D434; 0061; Additional folding
   1D435; 0062; Additional folding
   1D436; 0063; Additional folding
   1D437; 0064; Additional folding
   1D438; 0065; Additional folding
   1D439; 0066; Additional folding
   1D43A; 0067; Additional folding
   1D43B; 0068; Additional folding
   1D43C; 0069; Additional folding
   1D43D; 006A; Additional folding
   1D43E; 006B; Additional folding
   1D43F; 006C; Additional folding
   1D440; 006D; Additional folding
   1D441; 006E; Additional folding
   1D442; 006F; Additional folding
   1D443; 0070; Additional folding
   1D444; 0071; Additional folding
   1D445; 0072; Additional folding
   1D446; 0073; Additional folding
   1D447; 0074; Additional folding
   1D448; 0075; Additional folding
   1D449; 0076; Additional folding
   1D44A; 0077; Additional folding
   1D44B; 0078; Additional folding
   1D44C; 0079; Additional folding
   1D44D; 007A; Additional folding
   1D468; 0061; Additional folding
   1D469; 0062; Additional folding
   1D46A; 0063; Additional folding
   1D46B; 0064; Additional folding
   1D46C; 0065; Additional folding
   1D46D; 0066; Additional folding
   1D46E; 0067; Additional folding
   1D46F; 0068; Additional folding
   1D470; 0069; Additional folding
   1D471; 006A; Additional folding
   1D472; 006B; Additional folding
   1D473; 006C; Additional folding
   1D474; 006D; Additional folding
   1D475; 006E; Additional folding
   1D476; 006F; Additional folding
   1D477; 0070; Additional folding
   1D478; 0071; Additional folding
   1D479; 0072; Additional folding
   1D47A; 0073; Additional folding
   1D47B; 0074; Additional folding
   1D47C; 0075; Additional folding
   1D47D; 0076; Additional folding
   1D47E; 0077; Additional folding
   1D47F; 0078; Additional folding
   1D480; 0079; Additional folding
   1D481; 007A; Additional folding
   1D49C; 0061; Additional folding
   1D49E; 0063; Additional folding
   1D49F; 0064; Additional folding
   1D4A2; 0067; Additional folding
   1D4A5; 006A; Additional folding
   1D4A6; 006B; Additional folding
   1D4A9; 006E; Additional folding
   1D4AA; 006F; Additional folding
   1D4AB; 0070; Additional folding
   1D4AC; 0071; Additional folding
   1D4AE; 0073; Additional folding
   1D4AF; 0074; Additional folding
   1D4B0; 0075; Additional folding
   1D4B1; 0076; Additional folding
   1D4B2; 0077; Additional folding
   1D4B3; 0078; Additional folding
   1D4B4; 0079; Additional folding
   1D4B5; 007A; Additional folding
   1D4D0; 0061; Additional folding
   1D4D1; 0062; Additional folding
   1D4D2; 0063; Additional folding
   1D4D3; 0064; Additional folding
   1D4D4; 0065; Additional folding
   1D4D5; 0066; Additional folding
   1D4D6; 0067; Additional folding
   1D4D7; 0068; Additional folding
   1D4D8; 0069; Additional folding
   1D4D9; 006A; Additional folding
   1D4DA; 006B; Additional folding
   1D4DB; 006C; Additional folding
   1D4DC; 006D; Additional folding
   1D4DD; 006E; Additional folding
   1D4DE; 006F; Additional folding
   1D4DF; 0070; Additional folding
   1D4E0; 0071; Additional folding
   1D4E1; 0072; Additional folding
   1D4E2; 0073; Additional folding
   1D4E3; 0074; Additional folding
   1D4E4; 0075; Additional folding
   1D4E5; 0076; Additional folding
   1D4E6; 0077; Additional folding
   1D4E7; 0078; Additional folding
   1D4E8; 0079; Additional folding
   1D4E9; 007A; Additional folding
   1D504; 0061; Additional folding
   1D505; 0062; Additional folding
   1D507; 0064; Additional folding
   1D508; 0065; Additional folding
   1D509; 0066; Additional folding
   1D50A; 0067; Additional folding
   1D50D; 006A; Additional folding
   1D50E; 006B; Additional folding
   1D50F; 006C; Additional folding
   1D510; 006D; Additional folding
   1D511; 006E; Additional folding
   1D512; 006F; Additional folding
   1D513; 0070; Additional folding
   1D514; 0071; Additional folding
   1D516; 0073; Additional folding
   1D517; 0074; Additional folding
   1D518; 0075; Additional folding
   1D519; 0076; Additional folding
   1D51A; 0077; Additional folding
   1D51B; 0078; Additional folding
   1D51C; 0079; Additional folding
   1D538; 0061; Additional folding
   1D539; 0062; Additional folding
   1D53B; 0064; Additional folding
   1D53C; 0065; Additional folding
   1D53D; 0066; Additional folding
   1D53E; 0067; Additional folding
   1D540; 0069; Additional folding
   1D541; 006A; Additional folding
   1D542; 006B; Additional folding
   1D543; 006C; Additional folding
   1D544; 006D; Additional folding
   1D546; 006F; Additional folding
   1D54A; 0073; Additional folding
   1D54B; 0074; Additional folding
   1D54C; 0075; Additional folding
   1D54D; 0076; Additional folding
   1D54E; 0077; Additional folding
   1D54F; 0078; Additional folding
   1D550; 0079; Additional folding
   1D56C; 0061; Additional folding
   1D56D; 0062; Additional folding
   1D56E; 0063; Additional folding
   1D56F; 0064; Additional folding
   1D570; 0065; Additional folding
   1D571; 0066; Additional folding
   1D572; 0067; Additional folding
   1D573; 0068; Additional folding
   1D574; 0069; Additional folding
   1D575; 006A; Additional folding
   1D576; 006B; Additional folding
   1D577; 006C; Additional folding
   1D578; 006D; Additional folding
   1D579; 006E; Additional folding
   1D57A; 006F; Additional folding
   1D57B; 0070; Additional folding
   1D57C; 0071; Additional folding
   1D57D; 0072; Additional folding
   1D57E; 0073; Additional folding
   1D57F; 0074; Additional folding
   1D580; 0075; Additional folding
   1D581; 0076; Additional folding
   1D582; 0077; Additional folding
   1D583; 0078; Additional folding
   1D584; 0079; Additional folding
   1D585; 007A; Additional folding
   1D5A0; 0061; Additional folding
   1D5A1; 0062; Additional folding
   1D5A2; 0063; Additional folding
   1D5A3; 0064; Additional folding
   1D5A4; 0065; Additional folding
   1D5A5; 0066; Additional folding
   1D5A6; 0067; Additional folding
   1D5A7; 0068; Additional folding
   1D5A8; 0069; Additional folding
   1D5A9; 006A; Additional folding
   1D5AA; 006B; Additional folding
   1D5AB; 006C; Additional folding
   1D5AC; 006D; Additional folding
   1D5AD; 006E; Additional folding
   1D5AE; 006F; Additional folding
   1D5AF; 0070; Additional folding
   1D5B0; 0071; Additional folding
   1D5B1; 0072; Additional folding
   1D5B2; 0073; Additional folding
   1D5B3; 0074; Additional folding
   1D5B4; 0075; Additional folding
   1D5B5; 0076; Additional folding
   1D5B6; 0077; Additional folding
   1D5B7; 0078; Additional folding
   1D5B8; 0079; Additional folding
   1D5B9; 007A; Additional folding
   1D5D4; 0061; Additional folding
   1D5D5; 0062; Additional folding
   1D5D6; 0063; Additional folding
   1D5D7; 0064; Additional folding
   1D5D8; 0065; Additional folding
   1D5D9; 0066; Additional folding
   1D5DA; 0067; Additional folding
   1D5DB; 0068; Additional folding
   1D5DC; 0069; Additional folding
   1D5DD; 006A; Additional folding
   1D5DE; 006B; Additional folding
   1D5DF; 006C; Additional folding
   1D5E0; 006D; Additional folding
   1D5E1; 006E; Additional folding
   1D5E2; 006F; Additional folding
   1D5E3; 0070; Additional folding
   1D5E4; 0071; Additional folding
   1D5E5; 0072; Additional folding
   1D5E6; 0073; Additional folding
   1D5E7; 0074; Additional folding
   1D5E8; 0075; Additional folding
   1D5E9; 0076; Additional folding
   1D5EA; 0077; Additional folding
   1D5EB; 0078; Additional folding
   1D5EC; 0079; Additional folding
   1D5ED; 007A; Additional folding
   1D608; 0061; Additional folding
   1D609; 0062; Additional folding
   1D60A; 0063; Additional folding
   1D60B; 0064; Additional folding
   1D60C; 0065; Additional folding
   1D60D; 0066; Additional folding
   1D60E; 0067; Additional folding
   1D60F; 0068; Additional folding
   1D610; 0069; Additional folding
   1D611; 006A; Additional folding
   1D612; 006B; Additional folding
   1D613; 006C; Additional folding
   1D614; 006D; Additional folding
   1D615; 006E; Additional folding
   1D616; 006F; Additional folding
   1D617; 0070; Additional folding
   1D618; 0071; Additional folding
   1D619; 0072; Additional folding
   1D61A; 0073; Additional folding
   1D61B; 0074; Additional folding
   1D61C; 0075; Additional folding
   1D61D; 0076; Additional folding
   1D61E; 0077; Additional folding
   1D61F; 0078; Additional folding
   1D620; 0079; Additional folding
   1D621; 007A; Additional folding
   1D63C; 0061; Additional folding
   1D63D; 0062; Additional folding
   1D63E; 0063; Additional folding
   1D63F; 0064; Additional folding
   1D640; 0065; Additional folding
   1D641; 0066; Additional folding
   1D642; 0067; Additional folding
   1D643; 0068; Additional folding
   1D644; 0069; Additional folding
   1D645; 006A; Additional folding
   1D646; 006B; Additional folding
   1D647; 006C; Additional folding
   1D648; 006D; Additional folding
   1D649; 006E; Additional folding
   1D64A; 006F; Additional folding
   1D64B; 0070; Additional folding
   1D64C; 0071; Additional folding
   1D64D; 0072; Additional folding
   1D64E; 0073; Additional folding
   1D64F; 0074; Additional folding
   1D650; 0075; Additional folding
   1D651; 0076; Additional folding
   1D652; 0077; Additional folding
   1D653; 0078; Additional folding
   1D654; 0079; Additional folding
   1D655; 007A; Additional folding
   1D670; 0061; Additional folding
   1D671; 0062; Additional folding
   1D672; 0063; Additional folding
   1D673; 0064; Additional folding
   1D674; 0065; Additional folding
   1D675; 0066; Additional folding
   1D676; 0067; Additional folding
   1D677; 0068; Additional folding
   1D678; 0069; Additional folding
   1D679; 006A; Additional folding
   1D67A; 006B; Additional folding
   1D67B; 006C; Additional folding
   1D67C; 006D; Additional folding
   1D67D; 006E; Additional folding
   1D67E; 006F; Additional folding
   1D67F; 0070; Additional folding
   1D680; 0071; Additional folding
   1D681; 0072; Additional folding
   1D682; 0073; Additional folding
   1D683; 0074; Additional folding
   1D684; 0075; Additional folding
   1D685; 0076; Additional folding
   1D686; 0077; Additional folding
   1D687; 0078; Additional folding
   1D688; 0079; Additional folding
   1D689; 007A; Additional folding
   1D6A8; 03B1; Additional folding
   1D6A9; 03B2; Additional folding
   1D6AA; 03B3; Additional folding
   1D6AB; 03B4; Additional folding
   1D6AC; 03B5; Additional folding
   1D6AD; 03B6; Additional folding
   1D6AE; 03B7; Additional folding
   1D6AF; 03B8; Additional folding
   1D6B0; 03B9; Additional folding
   1D6B1; 03BA; Additional folding
   1D6B2; 03BB; Additional folding
   1D6B3; 03BC; Additional folding
   1D6B4; 03BD; Additional folding
   1D6B5; 03BE; Additional folding
   1D6B6; 03BF; Additional folding
   1D6B7; 03C0; Additional folding
   1D6B8; 03C1; Additional folding
   1D6B9; 03B8; Additional folding
   1D6BA; 03C3; Additional folding
   1D6BB; 03C4; Additional folding
   1D6BC; 03C5; Additional folding

   1D6BD; 03C6; Additional folding
   1D6BE; 03C7; Additional folding
   1D6BF; 03C8; Additional folding
   1D6C0; 03C9; Additional folding
   1D6D3; 03C3; Additional folding
   1D6E2; 03B1; Additional folding
   1D6E3; 03B2; Additional folding
   1D6E4; 03B3; Additional folding
   1D6E5; 03B4; Additional folding
   1D6E6; 03B5; Additional folding
   1D6E7; 03B6; Additional folding
   1D6E8; 03B7; Additional folding
   1D6E9; 03B8; Additional folding
   1D6EA; 03B9; Additional folding
   1D6EB; 03BA; Additional folding
   1D6EC; 03BB; Additional folding
   1D6ED; 03BC; Additional folding
   1D6EE; 03BD; Additional folding
   1D6EF; 03BE; Additional folding
   1D6F0; 03BF; Additional folding
   1D6F1; 03C0; Additional folding
   1D6F2; 03C1; Additional folding
   1D6F3; 03B8; Additional folding
   1D6F4; 03C3; Additional folding
   1D6F5; 03C4; Additional folding
   1D6F6; 03C5; Additional folding
   1D6F7; 03C6; Additional folding
   1D6F8; 03C7; Additional folding
   1D6F9; 03C8; Additional folding
   1D6FA; 03C9; Additional folding
   1D70D; 03C3; Additional folding
   1D71C; 03B1; Additional folding
   1D71D; 03B2; Additional folding
   1D71E; 03B3; Additional folding
   1D71F; 03B4; Additional folding
   1D720; 03B5; Additional folding
   1D721; 03B6; Additional folding
   1D722; 03B7; Additional folding
   1D723; 03B8; Additional folding
   1D724; 03B9; Additional folding
   1D725; 03BA; Additional folding
   1D726; 03BB; Additional folding
   1D727; 03BC; Additional folding
   1D728; 03BD; Additional folding
   1D729; 03BE; Additional folding
   1D72A; 03BF; Additional folding
   1D72B; 03C0; Additional folding
   1D72C; 03C1; Additional folding
   1D72D; 03B8; Additional folding
   1D72E; 03C3; Additional folding
   1D72F; 03C4; Additional folding
   1D730; 03C5; Additional folding
   1D731; 03C6; Additional folding
   1D732; 03C7; Additional folding
   1D733; 03C8; Additional folding
   1D734; 03C9; Additional folding
   1D747; 03C3; Additional folding
   1D756; 03B1; Additional folding
   1D757; 03B2; Additional folding
   1D758; 03B3; Additional folding
   1D759; 03B4; Additional folding
   1D75A; 03B5; Additional folding
   1D75B; 03B6; Additional folding
   1D75C; 03B7; Additional folding
   1D75D; 03B8; Additional folding
   1D75E; 03B9; Additional folding
   1D75F; 03BA; Additional folding
   1D760; 03BB; Additional folding
   1D761; 03BC; Additional folding
   1D762; 03BD; Additional folding
   1D763; 03BE; Additional folding
   1D764; 03BF; Additional folding
   1D765; 03C0; Additional folding
   1D766; 03C1; Additional folding
   1D767; 03B8; Additional folding
   1D768; 03C3; Additional folding
   1D769; 03C4; Additional folding
   1D76A; 03C5; Additional folding
   1D76B; 03C6; Additional folding
   1D76C; 03C7; Additional folding
   1D76D; 03C8; Additional folding
   1D76E; 03C9; Additional folding
   1D781; 03C3; Additional folding
   1D790; 03B1; Additional folding
   1D791; 03B2; Additional folding
   1D792; 03B3; Additional folding
   1D793; 03B4; Additional folding
   1D794; 03B5; Additional folding
   1D795; 03B6; Additional folding
   1D796; 03B7; Additional folding
   1D797; 03B8; Additional folding
   1D798; 03B9; Additional folding
   1D799; 03BA; Additional folding
   1D79A; 03BB; Additional folding
   1D79B; 03BC; Additional folding
   1D79C; 03BD; Additional folding
   1D79D; 03BE; Additional folding
   1D79E; 03BF; Additional folding
   1D79F; 03C0; Additional folding
   1D7A0; 03C1; Additional folding
   1D7A1; 03B8; Additional folding
   1D7A2; 03C3; Additional folding
   1D7A3; 03C4; Additional folding
   1D7A4; 03C5; Additional folding
   1D7A5; 03C6; Additional folding
   1D7A6; 03C7; Additional folding
   1D7A7; 03C8; Additional folding
   1D7A8; 03C9; Additional folding
   1D7BB; 03C3; Additional folding
   ----- End Table B.2 -----

B.3 Mapping for case-folding used with no normalization ✨

okay bestie, this is the whole case-folding table, the big list of letters and their lowercase lookalikes 🦋✨

   ----- Start Table B.3 -----
   0041; 0061; Case map
   0042; 0062; Case map
   0043; 0063; Case map
   0044; 0064; Case map
   0045; 0065; Case map
   0046; 0066; Case map
   0047; 0067; Case map
   0048; 0068; Case map
   0049; 0069; Case map
   004A; 006A; Case map
   004B; 006B; Case map
   004C; 006C; Case map
   004D; 006D; Case map
   004E; 006E; Case map
   004F; 006F; Case map
   0050; 0070; Case map
   0051; 0071; Case map
   0052; 0072; Case map
   0053; 0073; Case map
   0054; 0074; Case map
   0055; 0075; Case map
   0056; 0076; Case map
   0057; 0077; Case map
   0058; 0078; Case map
   0059; 0079; Case map
   005A; 007A; Case map
   00B5; 03BC; Case map
   00C0; 00E0; Case map
   00C1; 00E1; Case map
   00C2; 00E2; Case map
   00C3; 00E3; Case map
   00C4; 00E4; Case map
   00C5; 00E5; Case map
   00C6; 00E6; Case map
   00C7; 00E7; Case map
   00C8; 00E8; Case map
   00C9; 00E9; Case map
   00CA; 00EA; Case map
   00CB; 00EB; Case map
   00CC; 00EC; Case map
   00CD; 00ED; Case map
   00CE; 00EE; Case map
   00CF; 00EF; Case map
   00D0; 00F0; Case map
   00D1; 00F1; Case map
   00D2; 00F2; Case map
   00D3; 00F3; Case map
   00D4; 00F4; Case map
   00D5; 00F5; Case map
   00D6; 00F6; Case map
   00D8; 00F8; Case map
   00D9; 00F9; Case map
   00DA; 00FA; Case map
   00DB; 00FB; Case map
   00DC; 00FC; Case map
   00DD; 00FD; Case map
   00DE; 00FE; Case map
   00DF; 0073 0073; Case map
   0100; 0101; Case map
   0102; 0103; Case map
   0104; 0105; Case map
   0106; 0107; Case map
   0108; 0109; Case map
   010A; 010B; Case map
   010C; 010D; Case map
   010E; 010F; Case map
   0110; 0111; Case map
   0112; 0113; Case map
   0114; 0115; Case map
   0116; 0117; Case map
   0118; 0119; Case map
   011A; 011B; Case map
   011C; 011D; Case map
   011E; 011F; Case map
   0120; 0121; Case map
   0122; 0123; Case map
   0124; 0125; Case map
   0126; 0127; Case map
   0128; 0129; Case map
   012A; 012B; Case map
   012C; 012D; Case map
   012E; 012F; Case map
   0130; 0069 0307; Case map
   0132; 0133; Case map
   0134; 0135; Case map
   0136; 0137; Case map
   0139; 013A; Case map
   013B; 013C; Case map
   013D; 013E; Case map
   013F; 0140; Case map
   0141; 0142; Case map
   0143; 0144; Case map
   0145; 0146; Case map
   0147; 0148; Case map
   0149; 02BC 006E; Case map
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   0390; 03B9 0308 0301; Case map
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   03B0; 03C5 0308 0301; Case map
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   1E00; 1E01; Case map
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   1E0E; 1E0F; Case map
   1E10; 1E11; Case map
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   1E14; 1E15; Case map
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   1E20; 1E21; Case map
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   1E28; 1E29; Case map
   1E2A; 1E2B; Case map
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   1E3A; 1E3B; Case map
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   1E6A; 1E6B; Case map

   1E6C; 1E6D; Case map
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   1E90; 1E91; Case map
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   1E96; 0068 0331; Case map
   1E97; 0074 0308; Case map
   1E98; 0077 030A; Case map
   1E99; 0079 030A; Case map
   1E9A; 0061 02BE; Case map
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   1EBA; 1EBB; Case map
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   1EEC; 1EED; Case map
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   1EF2; 1EF3; Case map
   1EF4; 1EF5; Case map
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   1F08; 1F00; Case map
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   1F0A; 1F02; Case map
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   1F18; 1F10; Case map
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   1F1A; 1F12; Case map
   1F1B; 1F13; Case map
   1F1C; 1F14; Case map
   1F1D; 1F15; Case map
   1F28; 1F20; Case map
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   1F2A; 1F22; Case map
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   1F2F; 1F27; Case map
   1F38; 1F30; Case map
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   1F3A; 1F32; Case map
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   1F48; 1F40; Case map
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   1F4C; 1F44; Case map
   1F4D; 1F45; Case map
   1F50; 03C5 0313; Case map
   1F52; 03C5 0313 0300; Case map
   1F54; 03C5 0313 0301; Case map
   1F56; 03C5 0313 0342; Case map
   1F59; 1F51; Case map
   1F5B; 1F53; Case map
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   1F6A; 1F62; Case map
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   1F6C; 1F64; Case map
   1F6D; 1F65; Case map
   1F6E; 1F66; Case map
   1F6F; 1F67; Case map
   1F80; 1F00 03B9; Case map
   1F81; 1F01 03B9; Case map
   1F82; 1F02 03B9; Case map
   1F83; 1F03 03B9; Case map
   1F84; 1F04 03B9; Case map
   1F85; 1F05 03B9; Case map
   1F86; 1F06 03B9; Case map
   1F87; 1F07 03B9; Case map
   1F88; 1F00 03B9; Case map
   1F89; 1F01 03B9; Case map
   1F8A; 1F02 03B9; Case map
   1F8B; 1F03 03B9; Case map
   1F8C; 1F04 03B9; Case map
   1F8D; 1F05 03B9; Case map
   1F8E; 1F06 03B9; Case map
   1F8F; 1F07 03B9; Case map
   1F90; 1F20 03B9; Case map
   1F91; 1F21 03B9; Case map
   1F92; 1F22 03B9; Case map
   1F93; 1F23 03B9; Case map
   1F94; 1F24 03B9; Case map
   1F95; 1F25 03B9; Case map
   1F96; 1F26 03B9; Case map
   1F97; 1F27 03B9; Case map
   1F98; 1F20 03B9; Case map
   1F99; 1F21 03B9; Case map
   1F9A; 1F22 03B9; Case map
   1F9B; 1F23 03B9; Case map
   1F9C; 1F24 03B9; Case map
   1F9D; 1F25 03B9; Case map
   1F9E; 1F26 03B9; Case map
   1F9F; 1F27 03B9; Case map
   1FA0; 1F60 03B9; Case map
   1FA1; 1F61 03B9; Case map
   1FA2; 1F62 03B9; Case map
   1FA3; 1F63 03B9; Case map
   1FA4; 1F64 03B9; Case map
   1FA5; 1F65 03B9; Case map
   1FA6; 1F66 03B9; Case map
   1FA7; 1F67 03B9; Case map
   1FA8; 1F60 03B9; Case map
   1FA9; 1F61 03B9; Case map
   1FAA; 1F62 03B9; Case map
   1FAB; 1F63 03B9; Case map
   1FAC; 1F64 03B9; Case map
   1FAD; 1F65 03B9; Case map
   1FAE; 1F66 03B9; Case map
   1FAF; 1F67 03B9; Case map
   1FB2; 1F70 03B9; Case map
   1FB3; 03B1 03B9; Case map
   1FB4; 03AC 03B9; Case map
   1FB6; 03B1 0342; Case map
   1FB7; 03B1 0342 03B9; Case map
   1FB8; 1FB0; Case map
   1FB9; 1FB1; Case map
   1FBA; 1F70; Case map
   1FBB; 1F71; Case map
   1FBC; 03B1 03B9; Case map
   1FBE; 03B9; Case map
   1FC2; 1F74 03B9; Case map
   1FC3; 03B7 03B9; Case map
   1FC4; 03AE 03B9; Case map
   1FC6; 03B7 0342; Case map
   1FC7; 03B7 0342 03B9; Case map
   1FC8; 1F72; Case map
   1FC9; 1F73; Case map
   1FCA; 1F74; Case map
   1FCB; 1F75; Case map
   1FCC; 03B7 03B9; Case map
   1FD2; 03B9 0308 0300; Case map
   1FD3; 03B9 0308 0301; Case map
   1FD6; 03B9 0342; Case map
   1FD7; 03B9 0308 0342; Case map
   1FD8; 1FD0; Case map
   1FD9; 1FD1; Case map
   1FDA; 1F76; Case map
   1FDB; 1F77; Case map
   1FE2; 03C5 0308 0300; Case map
   1FE3; 03C5 0308 0301; Case map
   1FE4; 03C1 0313; Case map
   1FE6; 03C5 0342; Case map
   1FE7; 03C5 0308 0342; Case map
   1FE8; 1FE0; Case map
   1FE9; 1FE1; Case map
   1FEA; 1F7A; Case map
   1FEB; 1F7B; Case map
   1FEC; 1FE5; Case map
   1FF2; 1F7C 03B9; Case map
   1FF3; 03C9 03B9; Case map
   1FF4; 03CE 03B9; Case map
   1FF6; 03C9 0342; Case map
   1FF7; 03C9 0342 03B9; Case map
   1FF8; 1F78; Case map
   1FF9; 1F79; Case map
   1FFA; 1F7C; Case map
   1FFB; 1F7D; Case map
   1FFC; 03C9 03B9; Case map
   2126; 03C9; Case map
   212A; 006B; Case map
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   2160; 2170; Case map
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   2165; 2175; Case map
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   2168; 2178; Case map
   2169; 2179; Case map
   216A; 217A; Case map
   216B; 217B; Case map
   216C; 217C; Case map
   216D; 217D; Case map
   216E; 217E; Case map
   216F; 217F; Case map
   24B6; 24D0; Case map
   24B7; 24D1; Case map
   24B8; 24D2; Case map
   24B9; 24D3; Case map
   24BA; 24D4; Case map
   24BB; 24D5; Case map
   24BC; 24D6; Case map
   24BD; 24D7; Case map
   24BE; 24D8; Case map
   24BF; 24D9; Case map
   24C0; 24DA; Case map
   24C1; 24DB; Case map
   24C2; 24DC; Case map
   24C3; 24DD; Case map
   24C4; 24DE; Case map
   24C5; 24DF; Case map
   24C6; 24E0; Case map
   24C7; 24E1; Case map
   24C8; 24E2; Case map
   24C9; 24E3; Case map
   24CA; 24E4; Case map
   24CB; 24E5; Case map
   24CC; 24E6; Case map
   24CD; 24E7; Case map
   24CE; 24E8; Case map
   24CF; 24E9; Case map
   FB00; 0066 0066; Case map
   FB01; 0066 0069; Case map
   FB02; 0066 006C; Case map
   FB03; 0066 0066 0069; Case map
   FB04; 0066 0066 006C; Case map
   FB05; 0073 0074; Case map
   FB06; 0073 0074; Case map
   FB13; 0574 0576; Case map
   FB14; 0574 0565; Case map
   FB15; 0574 056B; Case map
   FB16; 057E 0576; Case map
   FB17; 0574 056D; Case map
   FF21; FF41; Case map
   FF22; FF42; Case map
   FF23; FF43; Case map
   FF24; FF44; Case map
   FF25; FF45; Case map
   FF26; FF46; Case map
   FF27; FF47; Case map
   FF28; FF48; Case map
   FF29; FF49; Case map
   FF2A; FF4A; Case map
   FF2B; FF4B; Case map
   FF2C; FF4C; Case map
   FF2D; FF4D; Case map
   FF2E; FF4E; Case map
   FF2F; FF4F; Case map
   FF30; FF50; Case map
   FF31; FF51; Case map
   FF32; FF52; Case map
   FF33; FF53; Case map
   FF34; FF54; Case map
   FF35; FF55; Case map
   FF36; FF56; Case map
   FF37; FF57; Case map
   FF38; FF58; Case map
   FF39; FF59; Case map
   FF3A; FF5A; Case map
   10400; 10428; Case map
   10401; 10429; Case map
   10402; 1042A; Case map
   10403; 1042B; Case map
   10404; 1042C; Case map
   10405; 1042D; Case map
   10406; 1042E; Case map
   10407; 1042F; Case map
   10408; 10430; Case map
   10409; 10431; Case map
   1040A; 10432; Case map
   1040B; 10433; Case map
   1040C; 10434; Case map
   1040D; 10435; Case map
   1040E; 10436; Case map
   1040F; 10437; Case map
   10410; 10438; Case map
   10411; 10439; Case map
   10412; 1043A; Case map
   10413; 1043B; Case map
   10414; 1043C; Case map
   10415; 1043D; Case map
   10416; 1043E; Case map
   10417; 1043F; Case map
   10418; 10440; Case map
   10419; 10441; Case map
   1041A; 10442; Case map
   1041B; 10443; Case map
   1041C; 10444; Case map
   1041D; 10445; Case map
   1041E; 10446; Case map
   1041F; 10447; Case map
   10420; 10448; Case map
   10421; 10449; Case map
   10422; 1044A; Case map
   10423; 1044B; Case map
   10424; 1044C; Case map
   10425; 1044D; Case map
   ----- End Table B.3 -----

C. Prohibition tables ✨

okay bestie, this is the prohibition tables era 🧚💅 Every table in this appendix is basically a little blocklist of code points. Each line holds one prohibited code point 🚫, then a semicolon, then a comment that gives the name of that code point 🎀. That's the whole format, no cap 🫶

C.1 Space characters

C.1.1 ASCII space characters

   ----- Start Table C.1.1 -----
   0020; SPACE
   ----- End Table C.1.1 -----

C.1.2 Non-ASCII space characters

   ----- Start Table C.1.2 -----
   00A0; NO-BREAK SPACE
   1680; OGHAM SPACE MARK
   2000; EN QUAD
   2001; EM QUAD
   2002; EN SPACE
   2003; EM SPACE
   2004; THREE-PER-EM SPACE
   2005; FOUR-PER-EM SPACE
   2006; SIX-PER-EM SPACE
   2007; FIGURE SPACE
   2008; PUNCTUATION SPACE
   2009; THIN SPACE
   200A; HAIR SPACE
   200B; ZERO WIDTH SPACE
   202F; NARROW NO-BREAK SPACE
   205F; MEDIUM MATHEMATICAL SPACE
   3000; IDEOGRAPHIC SPACE
   ----- End Table C.1.2 -----

C.2 Control characters

C.2.1 ASCII control characters

   ----- Start Table C.2.1 -----
   0000-001F; [CONTROL CHARACTERS]
   007F; DELETE
   ----- End Table C.2.1 -----

C.2.2 Non-ASCII control characters

   ----- Start Table C.2.2 -----
   0080-009F; [CONTROL CHARACTERS]
   06DD; ARABIC END OF AYAH
   070F; SYRIAC ABBREVIATION MARK
   180E; MONGOLIAN VOWEL SEPARATOR
   200C; ZERO WIDTH NON-JOINER
   200D; ZERO WIDTH JOINER
   2028; LINE SEPARATOR
   2029; PARAGRAPH SEPARATOR
   2060; WORD JOINER
   2061; FUNCTION APPLICATION
   2062; INVISIBLE TIMES
   2063; INVISIBLE SEPARATOR
   206A-206F; [CONTROL CHARACTERS]
   FEFF; ZERO WIDTH NO-BREAK SPACE
   FFF9-FFFC; [CONTROL CHARACTERS]
   1D173-1D17A; [MUSICAL CONTROL CHARACTERS]
   ----- End Table C.2.2 -----

C.3 Private use

   ----- Start Table C.3 -----
   E000-F8FF; [PRIVATE USE, PLANE 0]
   F0000-FFFFD; [PRIVATE USE, PLANE 15]
   100000-10FFFD; [PRIVATE USE, PLANE 16]
   ----- End Table C.3 -----

C.4 Non-character code points

   ----- Start Table C.4 -----
   FDD0-FDEF; [NONCHARACTER CODE POINTS]
   FFFE-FFFF; [NONCHARACTER CODE POINTS]
   1FFFE-1FFFF; [NONCHARACTER CODE POINTS]
   2FFFE-2FFFF; [NONCHARACTER CODE POINTS]
   3FFFE-3FFFF; [NONCHARACTER CODE POINTS]
   4FFFE-4FFFF; [NONCHARACTER CODE POINTS]
   5FFFE-5FFFF; [NONCHARACTER CODE POINTS]
   6FFFE-6FFFF; [NONCHARACTER CODE POINTS]
   7FFFE-7FFFF; [NONCHARACTER CODE POINTS]
   8FFFE-8FFFF; [NONCHARACTER CODE POINTS]
   9FFFE-9FFFF; [NONCHARACTER CODE POINTS]
   AFFFE-AFFFF; [NONCHARACTER CODE POINTS]
   BFFFE-BFFFF; [NONCHARACTER CODE POINTS]
   CFFFE-CFFFF; [NONCHARACTER CODE POINTS]
   DFFFE-DFFFF; [NONCHARACTER CODE POINTS]
   EFFFE-EFFFF; [NONCHARACTER CODE POINTS]
   FFFFE-FFFFF; [NONCHARACTER CODE POINTS]
   10FFFE-10FFFF; [NONCHARACTER CODE POINTS]
   ----- End Table C.4 -----

C.5 Surrogate codes

   ----- Start Table C.5 -----
   D800-DFFF; [SURROGATE CODES]
   ----- End Table C.5 -----

C.6 Inappropriate for plain text

   ----- Start Table C.6 -----
   FFF9; INTERLINEAR ANNOTATION ANCHOR
   FFFA; INTERLINEAR ANNOTATION SEPARATOR
   FFFB; INTERLINEAR ANNOTATION TERMINATOR
   FFFC; OBJECT REPLACEMENT CHARACTER
   FFFD; REPLACEMENT CHARACTER
   ----- End Table C.6 -----

C.7 Inappropriate for canonical representation 💅

These code points are the ones that don't belong in canonical form, so they're on the naughty list 🙈

   ----- Start Table C.7 -----
   2FF0-2FFB; [IDEOGRAPHIC DESCRIPTION CHARACTERS]
   ----- End Table C.7 -----

C.8 Change display properties or are deprecated ✨

Okay, this table is the drama queen of the appendix 💀 These code points either change how text is displayed or they're deprecated, so they get flagged.

   ----- Start Table C.8 -----
   0340; COMBINING GRAVE TONE MARK
   0341; COMBINING ACUTE TONE MARK
   200E; LEFT-TO-RIGHT MARK
   200F; RIGHT-TO-LEFT MARK
   202A; LEFT-TO-RIGHT EMBEDDING
   202B; RIGHT-TO-LEFT EMBEDDING
   202C; POP DIRECTIONAL FORMATTING
   202D; LEFT-TO-RIGHT OVERRIDE
   202E; RIGHT-TO-LEFT OVERRIDE
   206A; INHIBIT SYMMETRIC SWAPPING
   206B; ACTIVATE SYMMETRIC SWAPPING
   206C; INHIBIT ARABIC FORM SHAPING
   206D; ACTIVATE ARABIC FORM SHAPING
   206E; NATIONAL DIGIT SHAPES
   206F; NOMINAL DIGIT SHAPES
   ----- End Table C.8 -----

C.9 Tagging characters 🏷️

Last one in the prohibition club! These are the tagging characters, including the LANGUAGE TAG, and they're listed here as well 🧚

   ----- Start Table C.9 -----
   E0001; LANGUAGE TAG
   E0020-E007F; [TAGGING CHARACTERS]
   ----- End Table C.9 -----

D. Bidirectional tables 🌈

Now we're in the bidi zone, which is honestly giving a whole vibe 🦋 Appendix D is all about which code points have the bidirectional property "R" or "AL" and which have "L". Lots of tables, so get your snacks 🍓

D.1 Characters with bidirectional property "R" or "AL" 🔥

   ----- Start Table D.1 -----
   05BE
   05C0
   05C3
   05D0-05EA
   05F0-05F4
   061B
   061F
   0621-063A
   0640-064A
   066D-066F
   0671-06D5
   06DD
   06E5-06E6
   06FA-06FE
   0700-070D
   0710
   0712-072C
   0780-07A5
   07B1
   200F
   FB1D
   FB1F-FB28
   FB2A-FB36
   FB38-FB3C
   FB3E
   FB40-FB41
   FB43-FB44
   FB46-FBB1
   FBD3-FD3D
   FD50-FD8F
   FD92-FDC7
   FDF0-FDFC
   FE70-FE74
   FE76-FEFC
   ----- End Table D.1 -----

D.2 Characters with bidirectional property "L" 🌸

This is the big one, bestie 😭 It's the full list of "L" code points, so scroll at your own risk 💅

   ----- Start Table D.2 -----
   0041-005A
   0061-007A
   00AA
   00B5
   00BA
   00C0-00D6
   00D8-00F6
   00F8-0220
   0222-0233
   0250-02AD
   02B0-02B8
   02BB-02C1
   02D0-02D1
   02E0-02E4
   02EE
   037A
   0386
   0388-038A
   038C
   038E-03A1
   03A3-03CE
   03D0-03F5
   0400-0482
   048A-04CE
   04D0-04F5
   04F8-04F9
   0500-050F
   0531-0556
   0559-055F
   0561-0587
   0589
   0903
   0905-0939
   093D-0940
   0949-094C
   0950
   0958-0961
   0964-0970
   0982-0983
   0985-098C
   098F-0990
   0993-09A8
   09AA-09B0
   09B2
   09B6-09B9
   09BE-09C0
   09C7-09C8
   09CB-09CC
   09D7
   09DC-09DD
   09DF-09E1
   09E6-09F1
   09F4-09FA
   0A05-0A0A
   0A0F-0A10
   0A13-0A28
   0A2A-0A30
   0A32-0A33
   0A35-0A36
   0A38-0A39
   0A3E-0A40
   0A59-0A5C
   0A5E
   0A66-0A6F
   0A72-0A74
   0A83
   0A85-0A8B
   0A8D
   0A8F-0A91
   0A93-0AA8
   0AAA-0AB0
   0AB2-0AB3
   0AB5-0AB9
   0ABD-0AC0
   0AC9
   0ACB-0ACC
   0AD0
   0AE0
   0AE6-0AEF
   0B02-0B03
   0B05-0B0C
   0B0F-0B10
   0B13-0B28
   0B2A-0B30
   0B32-0B33
   0B36-0B39
   0B3D-0B3E
   0B40
   0B47-0B48
   0B4B-0B4C
   0B57
   0B5C-0B5D
   0B5F-0B61
   0B66-0B70
   0B83
   0B85-0B8A
   0B8E-0B90
   0B92-0B95
   0B99-0B9A
   0B9C
   0B9E-0B9F
   0BA3-0BA4
   0BA8-0BAA
   0BAE-0BB5
   0BB7-0BB9
   0BBE-0BBF
   0BC1-0BC2
   0BC6-0BC8
   0BCA-0BCC
   0BD7
   0BE7-0BF2
   0C01-0C03
   0C05-0C0C
   0C0E-0C10
   0C12-0C28
   0C2A-0C33
   0C35-0C39
   0C41-0C44
   0C60-0C61
   0C66-0C6F
   0C82-0C83
   0C85-0C8C
   0C8E-0C90
   0C92-0CA8
   0CAA-0CB3
   0CB5-0CB9
   0CBE
   0CC0-0CC4
   0CC7-0CC8
   0CCA-0CCB
   0CD5-0CD6
   0CDE
   0CE0-0CE1
   0CE6-0CEF
   0D02-0D03
   0D05-0D0C
   0D0E-0D10
   0D12-0D28
   0D2A-0D39
   0D3E-0D40
   0D46-0D48
   0D4A-0D4C
   0D57
   0D60-0D61
   0D66-0D6F
   0D82-0D83
   0D85-0D96
   0D9A-0DB1
   0DB3-0DBB
   0DBD
   0DC0-0DC6
   0DCF-0DD1
   0DD8-0DDF
   0DF2-0DF4
   0E01-0E30
   0E32-0E33
   0E40-0E46
   0E4F-0E5B
   0E81-0E82
   0E84
   0E87-0E88
   0E8A
   0E8D
   0E94-0E97
   0E99-0E9F
   0EA1-0EA3
   0EA5
   0EA7
   0EAA-0EAB
   0EAD-0EB0
   0EB2-0EB3
   0EBD
   0EC0-0EC4
   0EC6
   0ED0-0ED9
   0EDC-0EDD
   0F00-0F17
   0F1A-0F34
   0F36
   0F38
   0F3E-0F47
   0F49-0F6A
   0F7F
   0F85
   0F88-0F8B
   0FBE-0FC5
   0FC7-0FCC
   0FCF
   1000-1021
   1023-1027
   1029-102A
   102C
   1031
   1038
   1040-1057
   10A0-10C5
   10D0-10F8
   10FB
   1100-1159
   115F-11A2
   11A8-11F9
   1200-1206
   1208-1246
   1248
   124A-124D
   1250-1256
   1258
   125A-125D
   1260-1286
   1288
   128A-128D
   1290-12AE
   12B0
   12B2-12B5
   12B8-12BE
   12C0
   12C2-12C5
   12C8-12CE
   12D0-12D6
   12D8-12EE
   12F0-130E
   1310
   1312-1315
   1318-131E
   1320-1346
   1348-135A
   1361-137C
   13A0-13F4
   1401-1676
   1681-169A
   16A0-16F0
   1700-170C
   170E-1711
   1720-1731
   1735-1736
   1740-1751
   1760-176C
   176E-1770
   1780-17B6
   17BE-17C5
   17C7-17C8
   17D4-17DA
   17DC
   17E0-17E9
   1810-1819
   1820-1877
   1880-18A8
   1E00-1E9B
   1EA0-1EF9
   1F00-1F15
   1F18-1F1D
   1F20-1F45
   1F48-1F4D
   1F50-1F57
   1F59
   1F5B
   1F5D
   1F5F-1F7D
   1F80-1FB4
   1FB6-1FBC
   1FBE
   1FC2-1FC4
   1FC6-1FCC
   1FD0-1FD3
   1FD6-1FDB
   1FE0-1FEC
   1FF2-1FF4
   1FF6-1FFC
   200E
   2071
   207F
   2102
   2107
   210A-2113
   2115
   2119-211D
   2124
   2126
   2128
   212A-212D
   212F-2131
   2133-2139
   213D-213F
   2145-2149
   2160-2183
   2336-237A
   2395
   249C-24E9
   3005-3007
   3021-3029
   3031-3035
   3038-303C
   3041-3096
   309D-309F
   30A1-30FA
   30FC-30FF
   3105-312C
   3131-318E
   3190-31B7
   31F0-321C
   3220-3243
   3260-327B
   327F-32B0
   32C0-32CB
   32D0-32FE
   3300-3376
   337B-33DD
   33E0-33FE
   3400-4DB5
   4E00-9FA5
   A000-A48C
   AC00-D7A3
   D800-FA2D
   FA30-FA6A
   FB00-FB06
   FB13-FB17
   FF21-FF3A
   FF41-FF5A
   FF66-FFBE
   FFC2-FFC7
   FFCA-FFCF
   FFD2-FFD7
   FFDA-FFDC
   10300-1031E
   10320-10323
   10330-1034A
   10400-10425
   10428-1044D
   1D000-1D0F5
   1D100-1D126
   1D12A-1D166
   1D16A-1D172
   1D183-1D184
   1D18C-1D1A9
   1D1AE-1D1DD
   1D400-1D454
   1D456-1D49C
   1D49E-1D49F
   1D4A2
   1D4A5-1D4A6
   1D4A9-1D4AC
   1D4AE-1D4B9
   1D4BB
   1D4BD-1D4C0
   1D4C2-1D4C3
   1D4C5-1D505
   1D507-1D50A
   1D50D-1D514
   1D516-1D51C
   1D51E-1D539
   1D53B-1D53E
   1D540-1D544
   1D546
   1D54A-1D550
   1D552-1D6A3
   1D6A8-1D7C9
   20000-2A6D6
   2F800-2FA1D
   F0000-FFFFD
   100000-10FFFD
   ----- End Table D.2 -----

Authors' Addresses 🫶

Here are the lovely humans who wrote this, with their addresses and emails 💜

   Paul Hoffman
   Internet Mail Consortium and VPN Consortium
   127 Segre Place
   Santa Cruz, CA  95060 USA

   EMail: paul.hoffman@imc.org and paul.hoffman@vpnc.org


   Marc Blanchet
   Viagenie inc.
   2875 boul. Laurier, bur. 300
   Ste-Foy, Quebec, Canada, G1V 2M2

   EMail: Marc.Blanchet@viagenie.qc.ca

Full Copyright Statement ⚖️

This document and translations of it can be copied and handed out to others, and derivative works that comment on or explain it, or help with implementing it, can be made, copied, published and distributed, in whole or in part, with no restrictions of any kind. The one condition is that the copyright notice and this paragraph stay on every copy and derivative work. However, this document itself may not be modified in any way, such as by removing the copyright notice or the references to the Internet Society or other Internet organizations. The exceptions are when it's needed for developing Internet standards, in which case the copyright procedures defined in the Internet Standards process need to be followed, or when it's needed to translate it into languages other than English.

These limited permissions are perpetual and will not be revoked by the Internet Society or its successors or assigns. 🦋

This document and the information in it are provided on an "AS IS" basis and THE INTERNET SOCIETY AND THE INTERNET ENGINEERING TASK FORCE DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTY THAT THE USE OF THE INFORMATION HEREIN WILL NOT INFRINGE ANY RIGHTS OR ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. 💀

Acknowledgement 🌷

Funding for the RFC Editor function is currently provided by the Internet Society, and we love that for them 👑

📦 where this page comes from

ietf: rfc3454 2003-01
💖 girlified by claude-haiku-5-5 on 2026-10-17: a language model's rewrite of the original, under its terms