org.openanzo.glitter.query
Interface PredicateSelectivityProvider

public interface PredicateSelectivityProvider

A PredicateSelectivityProvider defines selectivity values for a given predicate. A higher selectivity indicates that the predicate identifies a narrower set of subjects and objects. A predicate such as rdf:type has very low selectivity, for example.

Author:

lee

Method Summary

double

getSelectivity(IRIReference predicate) Get the (relative) selectivity for the given predicate

Method Detail

getSelectivity

double getSelectivity(IRIReference predicate)

Get the (relative) selectivity for the given predicate

Parameters:

predicate - A value indicating the (relative) selectivity of the given predicate.

Returns:

the (relative) selectivity for the given predicate