Automatically assigned DDC number: 00574

Manually assigned DDC number: 02504

Number of references: 0

Title: Representing and Querying Changes in Semistructured Data

Author:

Author:

Author:

Subject: Sudarshan S. Chawathe,Serge Abiteboul,Jennifer Widom Representing and Querying Changes in Semistructured Data

Description: Semistructured data may be irregular and incomplete and does not necessarily conform to a fixed schema. As with structured data, it is often desirable to maintain a history of changes to data, and to query over both the data and the changes. Representing and querying changes in semistructured data is more difficult than in structured data due to the irregularity and lack of schema. We present a model for representing changes in semistructured data and a language for querying over these changes. An important feature of our approach is that we represent and query changes directly as annotationson the affected data, instead of indirectly as the difference between database states. We describe the implementation of our model and query language. We also describe the design and implementation of a query subscription service that permits users to subscribe to changes in semistructured information sources. 1 Introduction Semistructured data is data that has some structure, but it may be irreg...

Contributor: The Pennsylvania State University CiteSeer Archives

Publisher: unknown

Date: 1998-07-23

Pubyear: 1998

Format: ps

Identifier: http://citeseer.ist.psu.edu/140742.html

Source: http://www-db.stanford.edu/~chaw/pubs/doem-icde98.ps

Language: en

Rights: unrestricted

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