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|
Identifier |
000382634 |
Title |
A query formulation tool for semantic networks |
Alternative Title |
Σχεδίαση και ανάπτυξη ενός γραφικού συντάκτη επερωτήσεων για σημασιολογικά δίκτυα |
Author
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Ασαρίδης, Χρήστος
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Thesis advisor
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Τζίτζικας, Ιωάννης
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Reviewer
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Doerr, Martin
Πλεξουσάκης, Δημήτρης
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Abstract |
Over the last few years, there has been a trend of developing greater and greater
metadata repositories, mostly based on RDF/S technology. A good example is
the Europeana project in the field of cultural heritage. The international standard
ISO (CIDOC Conceptual Reference Model) is a rich RDF schema able to integrate
complex cultural data. Far more simplistic models (such as Dublin Core), which
consist exclusively of core metadata (few classes-flat relationships), have only a
limited potential to integrate knowledge and to apply reasoning to the schema. On the other hand, searching complex structures using query languages like SPARQL
is a difficult and painful procedure because of the large amount of classes and
properties in ontologies, such as the CIDOC-CRM.
In order to simplify the search process, we introduced a simpler model consisting
of only a few fundamental classes and relationships. Fundamental relationships
can be defined by using a “paths language” (over the CIDOC-CRM schema), which
is designed for non-expert users. In order to take advantage of this paths’ language,
we have designed and implemented a graphical editor, which assists users
in writing triple patterns and verifying their syntax. The graphical editor enables
users to overview the declared paths and allows them to check the validity and the
completeness of a query against the intended functionality. In addition, the editor
allows users to easily modify, relax and restrict a query. The given functionalities
help users to avoid errors, such as the misspelling of the name of classes (or properties),
the omission of the use of predefined special characters for paths connection
and the use of different kinds of brackets according to the context.
For the evaluation of the graphical editor, we asked non-expert users to test it
and give us feedback of their usage experience. Users tested it in the CIDOC-CRM
and the CIDOC-CRMdig, and the results of these tests were positive.
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Language |
English |
Subject |
Graphical editor |
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Metadata |
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Semantic search |
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Visual query system |
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Ανάκτηση πληροφορίας |
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Γραφικό σύστημα επερωτήσεων |
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Μεταδεδομένα |
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Σημασιολογικό δίκτυο |
Issue date |
2014-03-28 |
Collection
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School/Department--School of Sciences and Engineering--Department of Computer Science--Post-graduate theses
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Type of Work--Post-graduate theses
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Permanent Link |
https://elocus.lib.uoc.gr//dlib/8/c/9/metadata-dlib-1392713313-89233-4280.tkl
|
Views |
644 |