It’s a grammar plus some hand waving around types. Not a behavioral spec. It’s much less complete than SQL or SPARQL (e.g. SPARQL is like SQL in that it is based on relational operators but it has a good spec that describes what the operator algebra is exactly)

When post-structuralism burned out I think people would have gotten it that language doesn’t give any insight into behavior, at best people leave words behind like the evidence at the scene of a crime. Grammars are profoundly empty and meaningless.