org.dllearner.core.owl
Class Thing

java.lang.Object
  org.dllearner.core.owl.Description
      org.dllearner.core.owl.Thing

All Implemented Interfaces:

Serializable, Cloneable, KBElement, PropertyRange

public class Thing
extends Description

Implementation of owl:thing/TOP. TODO: According to the OWL 1.1 spec, owl:thing is special instance of class, so it might be better to put a method there for retrieving a/the instance of owl:thing. However, some algorithms require parent links e.g. in EXISTS r.TOP we may need to know where TOP belongs (especially for genetic operators). This is instance dependant, i.e. two different instances of TOP can have different parent links.

Author:

Jens Lehmann

See Also:

Serialized Form

Field Summary

static Thing

instance

Constructor Summary

Thing()

Method Summary

void	accept(DescriptionVisitor visitor)
void	accept(KBElementVisitor visitor)
int	getArity()
int	getLength() Gets the length of this knowledge base element.
URI	getURI()
String	toKBSyntaxString(String baseURI, Map<String,String> prefixes)
String	toManchesterSyntaxString(String baseURI, Map<String,String> prefixes) Returns a manchester syntax string of this description.
String	toString(String baseURI, Map<String,String> prefixes)

Methods inherited from class org.dllearner.core.owl.Description

addChild, addChild, clone, getChild, getChildren, getDepth, getNumberOfNodes, getParent, getSubtree, isRoot, removeChild, removeChild, replaceChild, setParent, toKBSyntaxString, toString

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

instance

public static final Thing instance

Constructor Detail

Thing

public Thing()

Method Detail

toString

public String toString(String baseURI,
                       Map<String,String> prefixes)

toKBSyntaxString

public String toKBSyntaxString(String baseURI,
                               Map<String,String> prefixes)

toManchesterSyntaxString

public String toManchesterSyntaxString(String baseURI,
                                       Map<String,String> prefixes)

Description copied from class: Description

Returns a manchester syntax string of this description. For a reference, see here and here (PDF).

Specified by:

toManchesterSyntaxString in interface KBElement

Specified by:

toManchesterSyntaxString in class Description

Returns:

The manchester syntax string for this description.

getURI

public URI getURI()

getLength

public int getLength()

Description copied from interface: KBElement

Gets the length of this knowledge base element. For instance, A AND B should have length 3 (as three constructs are involved). There are different ways to define the length of an axiom, class description etc., but this method provides a straightforward definition of it.

Returns:

The syntactic length of the KB element, defined as the number of syntactic constructs not including brackets.

getArity

public int getArity()

Specified by:

getArity in class Description

accept

public void accept(DescriptionVisitor visitor)

Specified by:

accept in class Description

accept

public void accept(KBElementVisitor visitor)