org.apache.clerezza.rdf.core.sparql.query
Interface OptionalGraphPattern

All Superinterfaces:

GraphPattern

All Known Implementing Classes:

SimpleOptionalGraphPattern

public interface OptionalGraphPattern
extends GraphPattern

Specifying an optional graph pattern implies the existence of a main graph pattern. The main graph pattern is an empty group pattern if it is not specified.

Author:

hasan

See Also:

SPARQL Query Language: 6 Including Optional Values

Method Summary

GraphPattern	getMainGraphPattern()
GroupGraphPattern	getOptionalGraphPattern()

Method Detail

getMainGraphPattern

GraphPattern getMainGraphPattern()

Returns:

the main graph pattern to match

getOptionalGraphPattern

GroupGraphPattern getOptionalGraphPattern()

Returns:

the optional graph pattern to match