SPARQL JSON-LD Encoding

A JSON-LD response is requested by specifying the media type application/ld+json as the Accept header value along with optional arguments to indicate the context and the expansion form.

The encoding is controlled by the optionally supplied context. If no context is specified the elements of a default, single-level context are generated on-demand, as term definitions which incorporate as member names the IRI local part for CONSTRUCT and DESCRIBE graph results or the dimension names for SELECT solution fields.

Accept

application/ld+json : indicates that the response should be encoded as JSON-LD, as controlled by an accompanying framing context. the media type permits a profile argument to control the JSON-LD encoding form. it is allowed to have one of the following values:

• http://www.w3.org/ns/json-ld#expanded

• http://www.w3.org/ns/json-ld#compacted (the default)

• http://www.w3.org/ns/json-ld#flattened (not the default)

Content-Type

The request body content type may indicate either a query or an update expression.

• application/sparql-query

• application/sparql-update

Link

A link with the relation type http://www.w3.org/ns/json-ld#context specifies the location of the context which is to govern the response encoding. A request to this location must permit application/ld+json as the Accept specification and must respond with a JSON-LD document which contains the context and and any framing information. In no contet link is supplied, the requisite field definitions are generated on-demand. For example

Link: <http://json-ld.org/contexts/person.jsonld>; rel=”http://www.w3.org/ns/json-ld#context”; type=”application/ld+json”