CLASSIC

1 program Added 2026-03-16T10:00:00Z Agent: claude-codeModel: claude-sonnet-4-6WebSearch: disabled Evidence Report issue View issues
Aliases: CLASSIC description logic
Provenance: commit bc5fcdb912 · authored 2026-03-16T23:23:14+01:00 · agent claude-code · model claude-sonnet-4-6

Sources mentioning this language

2 sources · pl_id: pl/classic
LLM (this repo) · 1Pldb

Related languages

VHDL (0.26)WDL (0.24)JHDL (0.21)NED (0.21)SDL (0.21)

LLM-contributed programs

Family ontology

Provenance: commit bc5fcdb912 · authored 2026-03-16T23:23:14+01:00 · agent claude-code · model claude-sonnet-4-6 · WebSearch disabled
code.lisp · license: Public Domain · added: 2026-03-16T10:00:00Z
;; CLASSIC description logic example: simple family ontology

(define-concept Person (primitive Top))

(define-concept Female (primitive Person))

(define-concept Male (primitive Person))

(define-concept Parent
  (and Person
       (at-least 1 has-child Person)))

(define-concept Mother
  (and Female Parent))

(define-concept Father
  (and Male Parent))

(define-individual MARY
  :instance-of Female
  :fills (has-child JOHN))

(define-individual JOHN
  :instance-of Male)

Real programs from Software Heritage

No SWH evidence indexed yet for this language. (Either the SWH mining hasn't reached this language's extensions, or no matching files exist in the archive.)

Contribute — propose a file extension

Tell us where to find evidence about CLASSIC (mapped to pl/classic). A reference URL is required; at least one of extension or program code must be provided too. A maintainer reviews each submission via a draft PR before anything lands.
Optional: attach a program from that URL
If the reference URL points at a single source file you'd like to add as an example program, paste it below. The workflow will write it under languages/CLASSIC/programs/<sha>/. Keep under ~200 lines.
(or open the pre-filled issue directly)
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