Validate type json-ld

[longshuicy]

1. check if context URLs are up-to-date
2. check if context URLs covered all the namespace. Might miss dc: at first glance
3. validate against json-ld validator or other tools
4. update the database and the builder component

[longshuicy]

https://json-ld.org/playground/

[longshuicy]

{
  "@language": "en",
  "dc": http://purl.org/dc/terms/
  "gml": "https://schemas.opengis.net/gml/",

  "iwfs": "http://www.ionicsoft.com/wfs/",

  "xlink": "http://www.w3.org/1999/xlink/",
  "xsd": "http://www.w3.org/2001/XMLSchema/",
  "qudt": "http://qudt.org/schema/qudt/",
  "unit": "http://qudt.org/vocab/unit/",
  "openvocab": "http://vocab.org/open/",
  "rdf": "http://www.w3.org/1999/02/22-rdf-syntax-ns#",
  "rdfs": "http://www.w3.org/2000/01/rdf-schema#",
  "dcat": "http://www.w3.org/ns/dcat#",
  "prov": "http://www.w3.org/ns/prov#"
}

Not sure about the iwfs

[longshuicy]

Found wfs namespace:

"wfs": "http://schemas.opengis.net/wfs/1.1.0/wfs.xsd"