Resource any RDF "thing", inc. URI (IRI), Literal, bNode etc.
RID Resource ID (maybe), stored in a 64bit int
Node a machine running in the storage cluster, each one holds
0 or more segments
Segment 1/2^nth of the data space, calculated by masking of the bottom
N bits of a hash of the data item. Stored in an unsigned 32bit
Frontend Software that controls query and import, runs on externally
Backend Software that runs on the cluster machines, accessed only by
the Frontend, stores quads (RID tuples) and resources (RID,
lexical, lang, datatype tuples).