de.mpg.escidoc.pubman.appbase.FacesBean
Deutsch
 
Hilfe Wegweiser Datenschutzhinweis Impressum Kontakt
  DetailsucheBrowse

Datensatz

DATENSATZ AKTIONENEXPORT

Freigegeben

Zeitschriftenartikel

Review - XTRACT: A System for Extracting Document Type Descriptors from XML Documents

MPG-Autoren
http://pubman.mpdl.mpg.de/cone/persons/resource/persons45720

Weikum,  Gerhard
Databases and Information Systems, MPI for Informatics, Max Planck Society;

Externe Ressourcen
Es sind keine Externen Ressourcen verfügbar
Volltexte (frei zugänglich)
Es sind keine frei zugänglichen Volltexte verfügbar
Ergänzendes Material (frei zugänglich)
Es sind keine frei zugänglichen Ergänzenden Materialien verfügbar
Zitation

Weikum, G. (2000). Review - XTRACT: A System for Extracting Document Type Descriptors from XML Documents. ACM SIGMOD Digital Review, 2.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000F-352E-8
Zusammenfassung
The paper describes the architecture of XTRACT, a system for inferring an accurate, meaningful, near optimal DTD schema for a repository of XML documents. The paper presents some very interesting ideas on an important and challenging subject. The XTRACT system executes three steps: 1. Generalization (finding patterns in the input sequences and replacing them with regular expressions to generate general candidate DTDs) 2. Factoring (factoring candidate DTDs using adaptions of algorithms for the optimization of Boolean functions) 3. applying MDL principle (applying the Minimum Description Length principle to find the near optimal DTD among the candidates). The authors provide experimental results in comparison with DDbE (Data Description by Example generated by IBM alphaworks(R)) The paper's key contribution lies in applying the MDL principle for defining an information-theoretic measure to quantify and resolve the tradeoff between the conciseness and precision of DTDs. This is indeed a reasonable and intriguing first cut on this difficult problem, but I am not fully convinced that this should be the bottom line. It could well be that conciseness by general regular expressions may reduce the readability and intuitiveness of a DTD. But this paper should be an excellent starting point for more intensive work along these lines.