@cmungall based on a quick scan of LinkML it looks like an ontology. maybe it belongs under the Ontologies section?

Good question. I'm just looking over it now but it seems to be more than just an ontology. I try not to create new sections with only one item in them though.

Yes, it is definitely not an ontology. That link is for one file within the repo, which a part of the metamodel converted to turtle

You can find more info here
https://linkml.io/linkml/

LinkML is a flexible modeling language that allows you to author schemas in YAML that describe the structure of your data. LinkML provides a framework for working with and validating data in a variety of formats (JSON, RDF, TSV) provides generators for compiling LinkML schemas to other frameworks.

You can think of this as being in the same general realm of shape languages like SHACL or ShEx (ShEx is also a singleton entry), although in many respects it's different in goals and approach.

I take your point about singleton categories - maybe one approach would be to lump some of the existing categories - e.g. ShEx and SHACL could go together in shape languages, and a broader category of 'schema languages' or 'modeling frameworks' could also incorporate linkml?

Can we add this? I think given its rapid uptake now it should be listed here.