Implementors FAQ

This FAQ compilation is intended to clarify NGSI-LD specification by providing answers to common questions that implementors may have.

• Q: Could you give me some examples of NGSI-LD payloads?

• R: See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_with_ldcontext_test.js#L16

• Q: What is a Property of a Property / Relationship?

• R: It is just what in NGSIv2 was a metadata. See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_test.js#L132

• Q: What is observedAt?

• R: It is the timestamp associated to a Property or Relationship. See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_test.js#L88

• Q: How location is represented?

• R: See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_with_ldcontext_test.js#L18

• Q: How DateTime is represented?

• R: See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_with_ldcontext_test.js#L44

• Q: Is application/json supported as MIME type?

• R: Yes, indeed. However, the @context has to be externally provided, or no @contextin that case Entities will be under the Default @context. See https://github.com/Fiware/NGSI-LD_Tests/blob/master/contextProvision/create_entity_with_ldcontext_test.js#L18

• Q: What is the JSON-LD Link header?

• R:

• Q: Is the @context mandatory?

• R:

• Q: How terms are mapped to URIs?. Please explain the logic behind it.

• R:

• Q: What happens if an Entity Id is a URL?

• R: