Cannot use `@reverse` combined with `"@container": "@id"`

Hello,

I am trying to use the @reverse keyword in combination with an @id index, but I keep getting a syntax error.

Given this part of graph data:

"@id": "http://example.org/my-shapes-graph#",
"@type": "owl:Ontology",
"classes": {
  "ex:SomeClass": {}
    # ...

I want it to render triples like this:

ex:SomeClass rdfs:member <http://example.org/my-shapes-graph#> .
# ...

So, in other words, I want classes to be a reverse of rdfs:member and its node be an index by identifier.

I would have expected the followg part of context to accomplish that:

"@context": {
  "classes": {
      "@reverse": "rdfs:member",
      "@container": "@id"
}

However, using several JSON-LD parsers I'm getting (like):

SyntaxError: @reverse is only compatible with @index and @set containers

Why is this the case? I cannot find or gather an explanation of this in the spec, and I would like to understand whether this is mathematically impossible in some way I'm missing, or just not currently implemented, or maybe just user error and already achievable.

Thanks,
Bart

Start by reading the JSON-LD 1.1 specification's rules for @reverse and @container, then compare the reported @reverse plus @id example with the allowed @index and @set containers. Done means documenting why the combination is rejected and whether the specification should clarify or change that behavior.