Annotating nested structures/values in JSON-LD - json-ld

Question

Say I have a JSON object with some properties in a nested object.
{
"title": "My Blog Post",
"meta": {
"publishedAt": "2016-08-01T00:00:00Z"
}
}
Is there an easy way I can just add a #context to my top-level object to reach
these properties (i.e. just "pass through" the meta object)? Something along
these lines:
{
"#context": {
"title": "schema:name",
"meta.publishedAt": {
"#type": "xsd:date",
"#id": "schema:datePublished"
}
},
"#id": "/my-article",
"title": "My Blog Post",
"meta": {
"publishedAt": "2016-08-01T00:00:00Z"
}
}
I would like to avoid having to add (duplicate) #id to the nested object, which is how I would otherwise have solved it:
{
"#context": {
"title": "schema:name",
"meta": { "#id": "_:meta", "#container": "#set" },
"publishedAt": {
"#type": "xsd:date",
"#id": "schema:datePublished"
}
},
"#id": "/my-article",
"title": "My Blog Post",
"meta": {
"#id": "/my-article",
"publishedAt": "2016-08-01T00:00:00Z"
}
}
This solution works, but requires duplication, and comes from ethanresnick's
comments on Github about annotating JSON API. He noted in another issue that #context is not "quite expressive enough to annotate the JSON API structure". I was hoping to prove him wrong at least with regards to this issue.

Answer 1

I just discovered that the latest JSON-LD spec includes a new section on nested properties. Defining your context like this should result in the desired output:
{
"#context": {
"title": "schema:name",
"meta": "#nest",
"publishedAt": {
"#type": "xsd:date",
"#id": "schema:datePublished",
"#nest": "meta"
}
},
...
}

Answer 2

If what you're trying to do is eat the meta element, then no, this can't be done in JSON-LD.
There have been discussions about doing an inverse-index that could do something like this, but I don't see an issue. You might create one at https://github.com/json-ld/json-ld.org/issues. At some point the CG, or a newly formed WG will start looking at feature requests for a new version.