File: glossary

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Glossary

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
		int

Frontend	Software that controls query and import, runs on externally
		accesible machine(s)

Backend		Software that runs on the cluster machines, accessed only by
		the Frontend, stores quads (RID tuples) and resources (RID,
		lexical, lang, datatype tuples).