Semantic Description of Multimedia Content Adaptation Web Services
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Date
2005-07-07
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Addis Ababa University
Abstract
In pervasive computing, multimedia information is accessed using different devices with
different processing power, storage size, display size, etc. Hence, the information that needs
to be displayed has to be modified in order to meet the devices’ requirements. This
modification is called content adaptation.
Multimedia content adaptation can be done at various places in different frameworks. Some
frameworks propose that content adaptation should be done by content servers, while others
consider that it should be done at the client side. Another approach considers that content
adaptation should be performed by third party services that can be implemented using web
services. The objective of this research is to find ways of facilitating discovery of these
third party content adaptation web services by users of these services.
In order to use these web services, one has to be able to find them on the Web. However,
today, finding the right web service for a specific task (multimedia content adaptation in
our case) is difficult. This is mainly because of the type of description used to advertise the
web services.
Current standards that are used to describe web services are syntactic. Syntactic description
of web services contains some keywords and signature of the web service, which is later,
used for searching the services. However, this information does not allow high rate of
success during service discovery. These limitations of the current standards can be
improved by using semantic description methods. Semantic description gives the meanings
and relationships of the terms and concepts used in describing a web service, which
improves the discovery of a web service.
In order to allow semantic description of multimedia content adaptation web services, we
have developed an ontology for multimedia content adaptation web services. To develop
this ontology, we first studied different ontology development methods based on which we
formulated an approach using which we have developed the ontology by identifying
different types of audio content adaptation web services and their properties that can be
used to increase the semantic information of the audio content adaptation web services.
In this research, we have also developed a prototype to show the usability of the ontology
that we developed. The prototype allows a user to advertise a web service using the
ontology and look for a specific web service.
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Keywords
Web Service Description, Ontology, Web Services, Audio Content Adaptation