Glossary
- binding
A pairing between a SPARQL variable and an RDF term. In practical terms, itâs a variable that has had a value assigned.
- bnode
See blank node
- blank node
A subject or object in an RDF graph that has no identity. These are typically used to group together other values. For example, an address book entry may have an email address of âjsmith@example.comâ, a phone number of 943-234-9664, and an address whose value is a blank node that has its own values: one for a street address, one for a city name, one for a postal code, and so forth. The resource that has these property values is represented by a prefixed name with an underscore prefix (for example,
_:xyz
) or as a pair of square braces ([]
). Tools that serialize triples do not have to save the prefixed name, as long as any new ones maintain all the same connections.See Also graphprefixed nameserialization
- cast
To convert a piece of data from one datatype to anotherâfor example, converting the string â123â to the integer 123 or â2011-10-14T13:19:00â^^xsd:dateTime to â2011-10-14T13:19:00â^^xsd:string. âCastâ is a common programming term and not specific to SPARQL.
- dataset
The collection of graphs that a given SPARQL query is querying. This collection consists of a default graph and optional named graphs.
See Also default graphnamed graph
- default graph
The triples in an RDF dataset that donât belong to a named graph.
- Dublin Core
A popular standard vocabulary providing a basic set of metadata terms such as ...
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