* [ATOM_EXT,EXT] Allow `inf` as ellipsis length for atom_truncate/3.
* [DCG_CONTENT,NEW] Added atom//2 allowing to use ellipsis on atoms generated.
* [RDF_NAME,EXT] Added option `literal_ellipsis/1`.
* [SPARRQL_DB,SC] Use more standard IRI prefix namespaces, taken from prefix.cc.
* [SPARQL_DB,EXT] Added XML namespace prefix for PROV.