Hyper-media Retrieval Engine for XML

Allgemeine Informationen

Beschreibung

XML is the emerging standard for representing knowledge in almost arbitrary applications. At least almost every kind of knowledge can be represented in XML. For exploring such knowledge, one needs a search engine which is able to let users benefit from all of the concepts with which XML blesses the world.

HyREX is the Hyper-media Retrieval Engine for XML [Abolhassani/etal:02] . The HyREX project is an ongoing effort (funded as part of other projects like e. g. CARMEN, CYCLADES, and CLASSIX) for developing an information retrieval engine for XML documents. HyREX's main characteristics can be derived from the constituents of its name:

hyper

HyREX offers explicit and implicit links to the user. Explicit links are specified within the documents, usually by means of XML linking standards, such as XLink and XPointer. Implicit links are intrinsic to information structures which \hyrex derives from XML document collections.

media

HyREX offers search facilities for text, but also for other media than text, at least conceptually.

retrieval engine

HyREX allows users to explore all kinds of information structures available through XML; besides retrieval in XML documents it allows for browsing and searching the domains of attributes of XML documents as well as schema information given for example by the DTD of a document collection.

XML

HyREX allows retrieval under consideration of content and structure inherent in XML documents.

Architecture

HyREX's architecture is similar to that of database management systems. Thus, there is a clear separation between the logical and the physical level. The physical layer HyPath deals with efficient access paths for retrieval, while the logical layer deals with the XIRQL query language. On top of these layers is HyGate, the user interface to HyREX applications.

In the following we give a brief outline on the characteristics of the levels.

HyGate User interface for searching and browsing Query formulation assistant Presentation of retrieval results XIRQL XML Information Retrieval Query Language extends XPath with IR capabilities Weighted document content and query conditions Ranking for search results Powerful searching for any type of information Relevance-oriented search HyPath Efficient access paths for content and structure application specific selection of access paths

Publikationen

• Mohammad Abolhassani; Norbert Fuhr; Saadia Malik (2004).
  HyREX at INEX 2003. In INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the Second INEX Workshop. Dagstuhl, Germany, December 15--17, 2003
• M. Abolhassani; N. Fuhr (2004).
  Applying the Divergence From Randomness Approach for Content-Only Search in XML Documents. In 26th European Conference on Information Retrieval Research (ECIR 2004)
• N. Fuhr; K. Großjohann (2004).
  XIRQL: An XML Query Language Based on Information Retrieval Concepts. ACM Transactions on Information Systems 22
• N. Fuhr; K. Großjohann; S. Kriewel (2003)
  A Query Language and User Interface for XML Information Retrieval.
• Norbert Gövert; Norbert Fuhr; Mohammad Abolhassani; Kai Großjohann (2003).
  Content-oriented XML retrieval with HyREX. In INitiative for the Evaluation of XML Retrieval (INEX). Proceedings of the First INEX Workshop. Dagstuhl, Germany, December 8--11, 2002
• Mohammad Abolhassani; Norbert Fuhr; Norbert Gövert; Kai Großjohann (2002).
  HyREX: Hypermedia Retrieval Engine for XML. Research Report , University of Dortmund, Department of Computer Science, Dortmund, Germany
• Norbert Fuhr; Norbert Gövert; Kai Großjohann (2002).
  HyREX: Hyper-media Retrieval Engine for XML. In Proceedings of the 25th Annual International Conference on Research and Development in Information Retrieval
• Norbert Fuhr; Norbert Gövert (2002).
  Index Compression vs. Retrieval Time of Inverted Files for XML Documents. In Proceedings of the 11th International Conference on Information and Knowledge Management
• Norbert Fuhr; Norbert Gövert (2002).
  Index Compression vs. Retrieval Time of Inverted Files for XML Documents. Technical Report , University of Dortmund
• N. Fuhr; K. Großjohann (2002).
  XIRQL: An XML Query Language Based on Information Retrieval Concepts. (Submitted for publication)
• K. Großjohann; N. Fuhr; D. Effing; S. Kriewel (2002).
  Query Formulation and Result Visualization for XML Retrieval. In: Proceedings ACM SIGIR 2002 Workshop on XML and Information Retrieval, ACM
• K. Großjohann; N. Fuhr; D. Effing; S. Kriewel (2002).
  A User Interface for XML Document Retrieval. In: Informatik 2002
• N. Fuhr; K. Großjohann (2001).
  XIRQL: A Query Language for Information Retrieval in XML Documents. In Proceedings of the 24th Annual International Conference on Research and development in Information Retrieval
• Norbert Gövert (2001).
  Bilingual Information Retrieval with HyREX and Internet Translation Services. In Cross-Language Information Retrieval and Evaluation
• K. Großjohann (2001).
  Physical Algebra. Research Report , University of Dortmund
• N. Fuhr; K. Großjohann; S. Kokkelink (2000).
  CAP7 -- Searching and Browsing in Distributed Document Collections. In Research and Advanced Technology for Digital Libraries. Proc. European Conference on Digital Libraries (ECDL 2000)
• N. Fuhr; K. Großjohann (2000).
  XIRQL -- An Extension of XQL for Information Retrieval. In Proceedings of the SIGIR 2000 Workshop on XML and Information Retrieval
• N. Fuhr; N. Gövert; Th. Rölleke (1998).
  DOLORES: A System for Logic-Based Retrieval of Multimedia Objects. In Proceedings of the 21st Annual International ACM SIGIR Conference on Research and Development in Information Retrieval
Norbert Fuhr (2002).
HyREX: A Hyper-media Retrieval Engine for XML. Talk at the workshop "Carmen--Next Steps" in Osnabrück, January 16-18 (in German).
[ PDF | PPT ]
Norbert Gövert, Kai Großjohann (2002):
HyREX Manual
Norbert Fuhr (2002):
XIRQL: A Query Language for Information Retrieval in XML documents Talk at the University of Freiburg, July 2002 (partly in German).
[ PPT ]
Norbert Fuhr (2002):
XIRQL: Eine Anfragesprache für Information Retrieval in XML-Dokumenten Vortrag an der Humboldt-Universität Berlin 2002
[ PPT PDF ]

Vorträge

• Mohammad Abolhassani; Norbert Fuhr; Saadia Malik (2003).
  HyREX at INEX 2003. Talk at the INEX Workshop, Dagstuhl

Diplom-, Master- und Bachelorarbeiten

• Optimierung der Prozessierung von XIRQL-Anfragen
  Abgeschlossene Diplomarbeit
• Entwicklung von Suchprädikaten für technische Texte
  Abgeschlossene Diplomarbeit
• Unterstützung von Nutzern bei der Erstellung von XIRQL-Anfragen
  Abgeschlossene Diplomarbeit
• Effiziente Wahrscheinlichkeitsberechnung für Ereignisausdrücke
  Abgeschlossene Diplomarbeit
• Entwicklung und Implementierung von Retrievalmethoden für strukturierte Dokumente
  Abgeschlossene Diplomarbeit
• Visualisierung für Retrieval von XML-Dokumenten
  Abgeschlossene Diplomarbeit
• Entwicklung einer Benutzerschnittstelle zu einem Hypertext-Information-Retrieval-System
  Abgeschlossene Diplomarbeit
• Entwicklung einer Audio-Retrieval-Komponente für ein multimediales IR-System
  Abgeschlossene Diplomarbeit
• Integration einer XML-Retrievalengine in Hyperwave
  Abgeschlossene Diplomarbeit
• Entwurf, Realisierung und Evaluierung von linguistischen Suchprädikaten für HyREX
  Abgeschlossene Diplomarbeit
• Effektive und effiziente Updates in invertierten Dateien
  Abgeschlossene Diplomarbeit
• Realisierung physikalischer Unabhängigkeit in einem IR-System
  Abgeschlossene Diplomarbeit

Verwandte Projekte

• CARMEN AP 7
  Content Analysis, Retrieval and Metadata: Effective Networking
  Arbeitspaket 7: A Document Referencing and Linking System
• CLASSIX
  Classification and Intelligent Search on Information in XML
• FOCUS
  Focussed retrieval of structured documents
• INEX
  Initiative for the Evaluation of XML retrieval

Software

• Latest release of the HyREX source code.

Testdaten

• Test collections and prototype applications.