NDLI: Querying XML documents made easy: nearest concept queries

Content Provider	IEEE Xplore Digital Library
Author	Schmidt, A. Kersten, M. Windhouwer, M.
Copyright Year	2001
Description	Author affiliation: CWI, Amsterdam, Netherlands (Schmidt, A.)
Abstract	Due to the ubiquity and popularity of XML, users often are in the following situation: they want to query XML documents which contain potentially interesting information but they are unaware of the mark-up structure that is used. For example, it is easy to guess the contents of an XML bibliography file whereas the mark-up depends on the methodological, cultural and personal background of the author(s). None the less, it is this hierarchical structure that forms the basis of XML query languages. We exploit the tree structure of XML documents to equip users with a powerful tool, the meet operator that lets them query databases with whose content they are familiar, but without requiring knowledge of tags and hierarchies. Our approach is based on computing the lowest common ancestor of nodes in the XML syntax tree: e.g., given two strings, we are looking for nodes whose offspring contains these two strings. The novelty of this approach is that the result type is unknown at query formulation time and dependent on the database instance. If the two strings are an author's name and a year mainly publications of the author in this year are returned. If the two strings are numbers the result mostly consists of publications that have the numbers as year or page numbers. Because the result type of a query is not specified by the user we refer to the lowest common ancestor as nearest concept. We also present a running example taken from the bibliography domain, and demonstrate that the operator can be implemented efficiently.
Sponsorship	IEEE Comput. Soc. Tech. Committee on Data Eng.
Starting Page	321
Ending Page	329
File Size	791004
Page Count	9
File Format	PDF
ISBN	0769510019
ISSN	10636382
DOI	10.1109/ICDE.2001.914844
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2001-04-02
Publisher Place	Germany
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	XML Database languages Object oriented databases Cultural differences Tree data structures Web sites HTML Encoding Data models Art
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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