User story:
As a Developer, I can request a reference to be expanded , so that I only need to make one request to get all of the information I need.

Capabilities:

• When an item refers to another item, I can retrieve that referenced item in the same request.
• The reference item info can be "shaped" in the same way as the main item - requesting specific fields, resolving links etc.
• I can request how many levels of expansion to perform, default is 0.

To Specify: Format of expanded content.
There are different opinions as to how to best include expanded content. Two options to evaluate:

• Content is expanded "in place" - so right where a linked categories UUID would have been, now there is an object containing the categories contents.
• Content is appended to the end of the response. So an additional category object is included at the end of the response.