Keyword List
Keywords that can be associated with an Object usually for use with ExternalObjects to record paper keywords,
etc.
Writable Fields:
object: API URL of the associated Object
keyphrase: Free text field for the key phrase to associate with the Object
identifier (optional): URL of ontology annotation to associate with this Keyword
Read-only Fields:
url: Reference to the instance of the Keyword, final integer is the Keyword id
last_updated: Datetime that this record was last updated
updated_by: Reference to the user that updated this record
GET /api/keyword/?format=api
{
    "count": 0,
    "next": null,
    "previous": null,
    "results": []
}