UnQL: a query language and algebra for semistructured data based on structural recursion

UnQL: a query language and algebra for semistructured data based on structural recursion The VLDB Journal (2000) 9: 76–110 The VLDB Journal c Springer-Verlag 2000 UnQL: a query language and algebra for semistructured data based on structural recursion 1 2 2 Peter Buneman , Mary Fernandez , Dan Suciu University of Pennsylvania AT&T Labs-Research, 180 Park Ave., Room E 233, Florham Park, NJ 07932-0971, USA; http://www.research.att.com/˜suciu Edited by P. Atzeni and A.O. Mendelzon. Received: July 9, 1999 / Accepted: December 24, 1999 Abstract. This paper presents structural recursion as the In a parallel development XML has emerged as a stan- basis of the syntax and semantics of query languages for dard format for data exchange on the Web [Con98]. How- semistructured data and XML. We describe a simple and ever,, the roots of XML are not in data models but in doc- powerful query language based on pattern matching and ument markup languages in which the markup is used to show that it can be expressed using structural recursion, convey the structure rather than the layout of a document. which is introduced as a top-down, recursive function, simi- Despite the disparate origins and different superficial ap- lar to the way XSL is defined on XML trees. On cyclic data, pearance of OEM http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png The VLDB Journal Springer Journals

UnQL: a query language and algebra for semistructured data based on structural recursion

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Publisher
Springer-Verlag
Copyright
Copyright © 2000 by Springer-Verlag Berlin Heidelberg
Subject
Computer Science; Database Management
ISSN
1066-8888
eISSN
0949-877X
D.O.I.
10.1007/s007780050084
Publisher site
See Article on Publisher Site

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