Changes between Version 2 and Version 3 of SimilarityMeasure


Ignore:
Timestamp:
07/25/06 19:46:18 (12 years ago)
Author:
endres
Comment:

--

Legend:

Unmodified
Added
Removed
Modified
  • SimilarityMeasure

    v2 v3  
    33The concept of a SimilarityMeasure in the PhaseLibs describes an interface to measure a distance (of any kind) between two ontology entities ([wiki:Frame Frames]). These entities can be taken from the same, or from two different ontologies. The resulting value is rquired to be in the interval [0..1]. 
    44 
    5 A SimilarityMeasure can use any information available (i.e. accessible via the ontology model interface) about the given entities ([wiki:Frame Frames]). 
     5A SimilarityMeasure can use any information available (i.e. accessible via the ontology model interface) about the given entities ([wiki:Frame Frames]). Furthermore a SimilarityMeasure can calculate a matrix of similarities to enable the algorithm to work more efficiently on large batches. 
    66 
    7 Furthermore a SimilarityMeasure can calculate a matrix of similarities to enable the algorithm to work more efficiently on large batches. 
     7This basic concept is represented by the interface [http://phaselibs.opendfki.de/repos/trunk/PhaseLibs/doc/JavaDoc/de/dfki/km/phaselib/model/evidence/SimilarityMeasure.html de.dfki.km.phaselib.model.evidence.SimilarityMeasure]. 
    88 
    9 This concept is represented by the class [http://phaselibs.opendfki.de/repos/trunk/PhaseLibs/doc/JavaDoc/de/dfki/km/phaselib/model/evidence/SimilarityMeasure.html de.dfki.km.phaselib.model.evidence.SimilarityMeasure]. 
     9 
     10= Extended Concepts = 
     11 
     12In order to allow for more specific information to be gathered from the algorithms, several extensions of this SimilarityMeasure concept exist. 
     13 
     14== asymmetric SimilarityMeasure == 
     15 
     16There is the concept of the asymmetric SimilarityMeasure, which allows the values of similarity(entityA, entityB) and similartiy(entityB, entityA) to be different. It is represented by the interface [http://phaselibs.opendfki.de/repos/trunk/PhaseLibs/doc/JavaDoc/de/dfki/km/phaselib/model/evidence/AsymmetricSimilarityMeasure.html de.dfki.km.phaselib.model.evidence.AsymmetricSimilarityMeasure]. This interface extends the [http://phaselibs.opendfki.de/repos/trunk/PhaseLibs/doc/JavaDoc/de/dfki/km/phaselib/model/evidence/SimilarityMeasure.html SimilarityMeasure] by methods to query this directed similarity, leaving the old methods to some sort of joint similrity, to be calculated from the two directed ones. A common approach to this calculations would be the minimum of the two similarities. 
     17 
     18 
     19== extended SimilarityMeasure == 
     20 
     21Furthermore, there are algorithms (like [wiki:similarity_SimFlood SimilarityFlooding]) that additionally provide information about a dissimilarity of entities. To allow for such information, the interface [http://phaselibs.opendfki.de/repos/trunk/PhaseLibs/doc/JavaDoc/de/dfki/km/phaselib/model/evidence/ExtendedSimilarityMeasure.html de.dfki.km.phaselib.model.evidence.ExtendedSimilarityMeasure] requires methods for dissimilarity querying.