# Semantic Metadata Management (Classes & Properties)
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##### Semantic Metadata Management (Classes & Properties)
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| Operation | Method | Endpoint | Request Content-Type | Response Accept | Notes | 
| --- |--- |--- |--- |--- |--- |
| Update Class Metadata | PATCH | `/ontologies/{id}/classes/{classIRI}` | `application/json`, `text/turtle` | `application/json` | Set `rdfs:comment`, `rdfs:label`, `skos:altLabel`, `skos:definition` | 
| Update Property Metadata | PATCH | `/ontologies/{id}/properties/{propertyIRI}` | `application/json`, `text/turtle` | `application/json` | Same metadata vocabulary as class metadata | 
| Get Class | GET | `/ontologies/{id}/classes/{classIRI}` | — | `text/turtle`, `application/ld+json`, `application/json` | Returns full axiom set \+ metadata | 
| List Classes | GET | `/ontologies/{id}/classes` | — | `application/json` | Filter by namespace, superclass | 
| List Properties | GET | `/ontologies/{id}/properties` | — | `application/json` | Filter by domain, range, type (`owl:ObjectProperty`, `owl:DatatypeProperty`) |