* [DCG_CONTENT,NEW] Added crlf//0.
* [DCG_CONTENT,EXT] Changed dcg_cicode//1 and dcg_cistring//1 from (+) to (?) instantiation. These can now read strings in a case-insensitive way.
* [RDF_CONTAINER,FIX] Typo.
* [RDF_MT_I,FIX] Resolved naming conflict.
Some work on asserting a DCG grammar based on an ABNF input file.
Awaiting answer from the SWI-Prolog mailing list.

* [DB_EXT,NEW] Added db_add_clause/[2,3].