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/******************************************************************
* File: Reasoner.java
* Created by: Dave Reynolds
* Created on: 09-Jan-2003
*
* (c) Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
* [See end of file]
* $Id: Reasoner.java,v 1.21 2008/12/28 19:32:04 andy_seaborne Exp $
*****************************************************************/
package com.hp.hpl.jena.reasoner;
import com.hp.hpl.jena.graph.Capabilities;
import com.hp.hpl.jena.graph.Graph;
import com.hp.hpl.jena.rdf.model.*;
/**
* The minimal interface to which all reasoners (or reasoner adaptors) conform.
* This only supports attaching the reasoner to a set of RDF graphs
* which represent the rules or ontologies and instance data. The actual
* reasoner requests are made through the InfGraph which is generated once
* the reasoner has been bound to a set of RDF data.
*
* @author Dave Reynolds
* @version $Revision: 1.21 $ on $Date: 2008/12/28 19:32:04 $
*/
public interface Reasoner {
/**
* This is most commonly used to attach an ontology (a set of tbox
* axioms in description logics jargon) to a reasoner. A certain amount
* of precomputation may be done at this time (e.g. constructing the
* class lattice). When the reasoner is later applied some instance data
* these cached precomputations may be reused.
* In fact this call may be more general than the above
* description suggests. Firstly, a reasoner that supports arbitrary rules
* rather than ontologies may use the same method to bind the reasoner
* to the specific rule set (encoded in RDF). Secondly, even in the ontology
* case a given reasoner may not require a strict separation of tbox and
* abox - it may allow instance data in the tbox and terminology axioms in
* the abox.
* A reasoner is free to simply note this set of RDF and merge with any
* future RDF rather than do processing at this time.
* @param tbox the ontology axioms or rule set encoded in RDF
* @return a reasoner instace which can be used to process a data graph
* @throws ReasonerException if the reasoner cannot be
* bound to a rule set in this way, for example if the underlying engine
* can only accept a single rule set in this way and one rule set has
* already been bound in of if the ruleset is illformed.
*/
public Reasoner bindSchema(Graph tbox) throws ReasonerException;
/**
* This is most commonly used to attach an ontology (a set of tbox
* axioms in description logics jargon) to a reasoner. A certain amount
* of precomputation may be done at this time (e.g. constructing the
* class lattice). When the reasoner is later applied some instance data
* these cached precomputations may be reused.
* In fact this call may be more general than the above
* description suggests. Firstly, a reasoner that supports arbitrary rules
* rather than ontologies may use the same method to bind the reasoner
* to the specific rule set (encoded in RDF). Secondly, even in the ontology
* case a given reasoner may not require a strict separation of tbox and
* abox - it may allow instance data in the tbox and terminology axioms in
* the abox.
* A reasoner is free to simply note this set of RDF and merge with any
* future RDF rather than do processing at this time.
* @param tbox the ontology axioms or rule set encoded in RDF
* @return a reasoner instace which can be used to process a data graph
* @throws ReasonerException if the reasoner cannot be
* bound to a rule set in this way, for example if the underlying engine
* can only accept a single rule set in this way and one rule set has
* already been bound in of if the ruleset is illformed.
*/
public Reasoner bindSchema(Model tbox) throws ReasonerException;
/**
* Attach the reasoner to a set of RDF data to process.
* The reasoner may already have been bound to specific rules or ontology
* axioms (encoded in RDF) through earlier bindRuleset calls.
* @param data the RDF data to be processed, some reasoners may restrict
* the range of RDF which is legal here (e.g. syntactic restrictions in OWL).
* @return an inference graph through which the data+reasoner can be queried.
* @throws ReasonerException if the data is ill-formed according to the
* constraints imposed by this reasoner.
*/
public InfGraph bind(Graph data) throws ReasonerException;
/**
* Switch on/off drivation logging.
* If set to true then the InfGraph created from the bind operation will start
* life with recording of derivations switched on. This is currently only of relevance
* to rule-based reasoners.
*
* Default - false.
*/
public void setDerivationLogging(boolean logOn);
/**
* Set a configuration parameter for the reasoner. Parameters can identified
* by URI and can also be set when the Reasoner instance is created by specifying a
* configuration in RDF.
*
* @param parameterUri the property identifying the parameter to be changed
* @param value the new value for the parameter, typically this is a wrapped
* java object like Boolean or Integer.
*/
public void setParameter(Property parameterUri, Object value);
/**
* Return a description of the capabilities of this reasoner encoded in
* RDF. These capabilities may be static or may depend on configuration
* information supplied at construction time. May be null if there are
* no useful capabilities registered.
*/
public Model getReasonerCapabilities();
/**
* Add a configuration description for this reasoner into a partial
* configuration specification model.
* @param configSpec a Model into which the configuration information should be placed
* @param base the Resource to which the configuration parameters should be added.
*/
public void addDescription(Model configSpec, Resource base);
/**
* Determine whether the given property is recognized and treated specially
* by this reasoner. This is a convenience packaging of a special case of getCapabilities.
* @param property the property which we want to ask the reasoner about
* @return true if the given property is handled specially by the reasoner.
*/
public boolean supportsProperty(Property property);
/**
* Return the Jena Graph Capabilties that the inference graphs generated
* by this reasoner are expected to conform to.
*/
public Capabilities getGraphCapabilities();
}
/*
(c) Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Hewlett-Packard Development Company, LP
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions
are met:
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notice, this list of conditions and the following disclaimer.
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notice, this list of conditions and the following disclaimer in the
documentation and/or other materials provided with the distribution.
3. The name of the author may not be used to endorse or promote products
derived from this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/