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_type(+Code:integer, -Types:list(atom))

Types is the sorted list of UTS #39 Identifier_Type atoms for Code (recommended, inclusion, technical, obsolete, limited_use, exclusion, not_nfkc, not_xid, default_ignorable, deprecated, uncommon_use). Fails for code points outside the Unicode range or with no entry in IdentifierType.txt.