Reserved keywords

[lanthaler]

I think to be able to make JSON-LD forward-compatible we shouldn't allow terms that start with an @. We don't necessarily have to throw an exception at this point, but we make it clear that any term starting with an @ might be used in a future version of JSON-LD. If we don't do that, we won't be able to introduce new keywords without breaking stuff in the future.

This came up while discussing fa8a035

[dlongley]

I think we should strongly discourage the use of terms starting with '@' but we should not throw an exception.

[lanthaler]

RESOLVED: Terms MAY be defined as any valid JSON string. Terms starting with an '@' character SHOULD NOT be used as they may create forward-compatibility issues.