FARS Shape
What it is
A FARS Shape is the encoding of a RelationalSystemShape in the FlatfileAgentialResourceSystem.
It is a SHACL shape file at shacl/{predicate-id}.ttl.
One file per predicate.
The shape uses sh:targetSubjectsOf :{predicate-id} to target every entity that carries that predicate.
Constraints are expressed as sh:property or sh:node rules on the shape node.
A FARS Shape is itself a RelationalEntity: it has id and description and is in R.
It MUST live at shacl/{predicate-id}.ttl.
It MUST use sh:targetSubjectsOf :{predicate-id} — never rdf:type or class membership.
It MUST cover exactly one predicate.
The universal shape
shacl/id.ttl is the universal shape: since every entity has id, it targets every entity.
It states: description is required, id is a kebab-case string, and the filename matches {id}.md.
Open questions
See also
- write-shacl-shapes — open work item for writing the first shape files