comment on wording at beginning of SPARQL Query Language for RDF

I just started reading

	http://www.w3.org/TR/2006/WD-rdf-sparql-query-20060220/

and was brought up short by the poor wording at its very beginning:

	An RDF graph is a set of triples; each triple consists of a subject, a
	predicate and an object. This is defined in RDF Concepts and Abstract
	Syntax [CONCEPTS]. These triples can come from a variety of sources.

Surely better wording can be generated, particularly at this important part of
the document.

Peter F. Patel-Schneider