This is a place for the RDF Working Group and the SPARQL Working Group to brainstorm about possible replacements for the terms like 'g-snap', 'RDF Document', etc.
Terms for "g-text"
Roughly: An immutable sequence of characters which conveys a collection of RDF triples.
This is what's used in sparql11-http-rdf-update
This is also used in sparql11-http-rdf-update, for when the G-Text is being transmitted in an HTTP protocol operation
Terms for "g-box"
Roughly: A conceptual holder (such as a program data structure) for a mutable collection of RDF triples.
Terms for "g-snap"
Roughly: An immutable mathematical set of RDF triples. Two g-snaps containing the same triples are the same g-snap.
Terms for "graph store"
Roughly: the abstract state of a sparql endpoint which implements sparql update