add document on semantics options and add options to terminology document

[pfps]

Yes, fix coming.

[rat10]

where the syntactic form of the arguments to triples is important, except that only the meaning of blank nodes is important.

As I read it the last (emphasized) half-sentence effectively overrules the preceding half-sentence. The meaning of the whole sentence IMO is that "only the meaning of blank nodes is important, everything else doesn't matter". Also, this kind of language is still semanticists-speak. I would prefer a less concise, but more approachable version of "the meaning of blank nodes is important", e.g. "blank nodes are interpreted and mean the same as in neighbouring non-embedded triples, whereas other terms...". That "..." denotes a problem too - do syntactic terms in quoted triples refer to something in the realm of interpretation, just only in this specific syntactic form? If, as I assume, yes then that should be made more explicit as well.

[pfps]

@rat10 The terminology bits are designed to be short, and they point to a longer document with more information.