# Is there a table like “the comprehensive LaTeX symbol list” indexed by Unicode code points?

Motivation: There are a lot of specific characters mentioned in How to solve the `Package inputenc Error: Unicode char not set up for use with LaTeX` problem? (This question can be considered as an extension to it) There are even more questions on this this asking about similar errors for specific characters. I know that some of the characters can be properly handled by `inputenc` if you include the proper packages, but is there a list (even incomplete) on which unicode characters are implemented in which packages or is there a general guide on how to find such a package if I encounter a specific character that reports these errors?

Note: I know that I can manually do `\DeclareUnicodeCharacter` for the problematic ones and I also know the options of using LuaTeX and XeTeX as mentioned in the only comment of the linked question, but I still believe such a table/mapping can be helpful to the general public if it does exist, especially if it is indexed by Unicode code points.

As a specific example, maybe a demonstration of how to find which package includes "parenthesized Latin small letter a ⒜ (U+249C)" is helpful. (Not which package to use, but how to find those packages).

I will also be happy to accept an answer claiming such a table/list does not/should not exist with sound evidence.

Edit: With the help of the answer by @David Carlisle I found this related question: Mapping from Unicode character to LaTeX-Symbol for BibTeX?

• I think you can make that the question title ("Is there a comprehensive symbol list indexed by Unicode codepoint?"): ultimately your question is not about "inputenc errors" but about having all symbols provided by all packages (or at least many symbols provided by many packages) indexed by Unicode codepoint (or these days they call it "Unicode scalar value"). – ShreevatsaR Apr 25 at 16:56
• I know a number of source where I search when such questions arise, but no comprehensive list. A well maintained list comparable to the symbol list would be nice, so if you are willing to create it, go along. – Ulrike Fischer Apr 25 at 17:20
• I am willing to do some work but maybe you can provide the sources you know? – Weijun Zhou Apr 25 at 17:21

The `unicode.xml` file available from https://github.com/w3c/xml-entities has a lot of information about names for Unicode characters, it has several latex names although only the `unicode-math` set (as used by `unicode-math` package for xwtwx/luatex or `stix` package for pdftex) has been checked recently. That is also the source of the tex names shown if you paste text into
Will Robertson’s “Symbols Defined by `unicode-math` contains nearly every math-mode symbol and its Unicode codepoint.
The documentation for the `utf8` option of `inputenc` comes with a listing of every commonly-used text-mode symbol by its Unicode codepoint. With legacy 7- and 8-bit encodings, these are defined by a `.def` file, and in the modern toolchain, they are defined by `fontspec` with compatible commands.