DCAT-US writer: support conformsTo field

[Johnathan]

Add support for DCAT-US conformsTo field.

Conditionality: optional
Namespace: dc: "http://purl.org/dc/terms/"

DCAT-US schema mapping

conformsTo: {
  @id: "dc:conformsTo",
  @type: "@id"
}

(http://purl.org/dc/terms/conformsTo)

Description

URI used to identify a standardized specification the dataset conforms to.

Usage notes

Used to identify a standardized specification the dataset conforms to. If this is a technical specification associated with a particular serialization of a distribution, this should be specified with conformsTo at the distribution level. It’s recommended that this be a URI that serves as a unique identifier for the standard. The URI may or may not also be a URL that provides documentation of the specification.

mdJson mapping

Currently not able to identify the schema standard the data conforms to, though this has been proposed. Should this be built and there is community decision to support it, then it can be mapped.