Abstract of FKI-203-95

Document-Name:  fki-203-95.ps.gz
Title:          Qualitative distances
Authors:        Daniel Hernandez 
                Eliseo Clementini 
                Paolino Di Felice 
Revision-Date:  1995/01/03 
Category:       Technical Report (Forschungsberichte Künstliche Intelligenz)
Abstract:       A framework for the representation of qualitative
                distances is developed inspired by previous work on
                qualitative orientation.  It is based on the concept
                of ``distance systems'' consisting of a list of
                distance relations and a set of structure relations
                that describe how the distance relations in turn
                relate to each other.  The framework is characterized
                by making the role of the ``frame of reference''
                explicit in the context of distances.  The composition
                of distance relations as main inference mechanism to
                reason about distances within a given frame of
                reference is explained, in particular under
                ``homogeneous structural restrictions''.  Finally, we
                introduce articulation rules as a way to mediate
                between different frames of reference.
Keywords:       distance systems, frames of reference, representation
                of spatial knowledge, qualitative
                representation.
Citation:       Submitted to IJCAI-95. Please do not quote or
                redistribute. Authors welcome comments.
Size:           14 pages
Language:       English
ISSN:           0941-6358
Copyright:      The ``Forschungsberichte Künstliche Intelligenz''
                series includes primarily preliminary publications,
                specialized partial results, and supplementary
                material. In the interest of a subsequent final
                publication these reports should not be copied. All
                rights and the responsability for the contents of the
                report are with the authors, which would appreciate
                critical comments.





Gerhard Weiss