Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-56101
Augsten, Nikolaus; Böhlen, Michael H; Gamper, Johann (2005). Approximate matching of hierarchical data using pq-grams. In: 31st International Conference on Very Large Data Bases, Trondheim, Norway, 30 August 2005 - 2 September 2005, 301-312.
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When integrating data from autonomous sources, exact matches of data items that represent the same real world object often fail due to a lack of common keys. Yet in many cases structural information is available and can be used to match such data. As a running example we use residential address information. Addresses are hierarchical structures and are present in many databases. Often they are the best, if not only, relationship between autonomous data sources. Typically the matching has to be approximate since the representations in the sources differ.We propose pq-grams to approximately match hierarchical information from autonomous sources. We define the pq-gram distance between ordered labeled trees as an effective and efficient approximation of the well-known tree edit distance. We analyze the properties of the pq-gram distance and compare it with the edit distance and alternative approximations. Experiments with synthetic and real world data confirm the analytic results and the scalability of our approach.
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|Item Type:||Conference or Workshop Item (Paper), refereed, original work|
|Communities & Collections:||03 Faculty of Economics > Department of Informatics|
|Dewey Decimal Classification:||000 Computer science, knowledge & systems|
|Event End Date:||2 September 2005|
|Deposited On:||29 May 2012 08:55|
|Last Modified:||17 Oct 2012 15:42|
|Series Name:||VLDB '05|
|Other Identification Number:||merlin-id:5868|
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