JSON-LD: Skipping keys, but parsing their contents

Morning,

I'm playing with adding extra bits to a HAL document
(http://stateless.co/hal_specification.html), so that I can get some RDF
linked data out of it. Here's an example HAL document:

> {
>   "label": "happy",
>   "_links": {
>     "self": {"href": "http://example.com/happy"},
>     "narrower": {"href": "http://example.com/ecstatic"}
>   }
> }

I can then extend this to look like:

> {
>   "@context": {
>     "skos": "http://www.w3.org/2004/02/skos/core#",
>     "label": "skos:prefLabel",
>     "narrower": "skos:narrower",
>   },
>   "@id": "http://id.example.com/happy",
>   "@type": "skos:Concept",
>   "label": "happy",
>   "_links": {
>     "self": {
>       "@id": "http://id.example.com/happy",
>       "href": "http://example.com/happy"
>      },
>     "narrower": {
>       "@id": "http://id.example.com/ecstatic",
>       "href": "http://example.com/ecstatic"
>      },
>   }
> }

The point is that the document should still be meaningful to HAL
clients, which can ignore the extra @context, @id and @type properties.

However, I don't know how to get a JSON-LD parser past the "_links" key.
As far as we're concerned it's meaningless and its children could/should
be included one level up (but that result in the document no longer
being HAL). I thought {"@container": "@index"} might be the answer, but
that means that /the current key has meaning, and its children don't/,
which is the wrong way round for my use case.

Is there an answer?

I realise I've missed the deadlines for commenting on the JSON-LD PR
(http://www.w3.org/TR/json-ld/), so I hope it's me that's missed
something as opposed to the functionality I want not being there.

Best regards,

Alex

-- 
Alexander Dutton
Linked Open Data Architect, Office of the CIO; data.ox.ac.uk, OxPoints
IT Services, University of Oxford