Create services which will return a list of properties by type to have clients adapted to the web service. Groups of properties : - [ ] RDFS _/vocabularies/rdfs/properties_ - [X] GET - rdfs:label - rdfs:comment - [ ] SKOS - [x] Devices - [x] comments - [X] labels - [ ] DublinCore - [x] Contacts - [x] comments - [X] labels