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From Semistructured Data to XML: Migrating the Lore Data Model and Query Language

Goldman, R. and McHugh, J. and Widom, J. (1999) From Semistructured Data to XML: Migrating the Lore Data Model and Query Language. In: ACM SIGMOD Workshop on The Web and Databases ( WebDB 1999) , June 3-4, 1999, Philadelphia, Pennsylvania.




Research on semistructured data over the last several years has focused on data models, query languages, and systems where the database is modeled as some form of labeled, directed graph. The recent emergence of eXtensible Markup Language (XML) as a new standard for data representation and exchange on the World-Wide Web has drawn significant attention. Researchers have casually observed a striking similarity between semistructured data models and XML. While similarities do abound, some key differences dictate changes to any existing data model, query language, or DBMS for semistructured data in order to fully support XML. This paper describes our experiences migrating the Lore database management system for semistructured data to work with XML. We present our modified data model, whose definition was a subtly challenging task given that XML itself is just a textual language. Based on this model, we describe changes to Lorel, Lore's query language. We also briefly discuss changes to Lore's dynamic structural summaries (DataGuides) and the relationship of DataGuides to XML's Document Type Definitions (DTDs).

Item Type:Conference or Workshop Item (Paper)
Uncontrolled Keywords:XML, semistructured data, Lore, Lorel
Subjects:Computer Science > Semistructured Data
Related URLs:Project Homepage
ID Code:409
Deposited By:Import Account
Deposited On:25 Feb 2000 16:00
Last Modified:28 Dec 2008 09:09

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