SWI-Prolog -- unicode_identifier

Documentation
- Reference manual
- Packages
  - SWI-Prolog Unicode library
    - library(unicode_security): Unicode security helpers (UTS #39, UAX #24)

Availability::- use_module(library(unicode_security)).(can be autoloaded)

[semidet]unicode_identifier_status(+Code:integer, -Status:atom)

Succeeds, unifying Status with allowed, when Code is listed in UTS #39 IdentifierStatus.txt with status Allowed. Fails otherwise — per UTS #39 every code point not listed there is Restricted by default; rather than return restricted for everything else, this predicate simply fails.