Add ability to describe a datamodel within the dataset editor of GeoNetwork

[pvgenuchten]

GeoNetwork facilitates to describe a datamodel or feature-catalog using iso19110 and link it to the dataset record. Three optimisations are suggested:

• Research if we can link a fielddefinition in iso19110 to a semantic web concept, eg store a reference to http://schema.org/email for all database fields that contain an email value. This metadata can then be used to create a json-ld context for any WFS-feature described by that iso19110 document.
• Facilitate in the UI the creation of iso19110 metadata, add a button to metadata editor: "describe feature-catalog", which opens a panel which creates/updates linked iso19110 document
• In the iso19110 editor facilitate to create references to ontological concepts such as schema.org, users can select from a predefined list of concepts or add a concept from an ontology manually