(c)2001 National Institute of Informatics
ISBN 4-924600-98-9
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| Title: | MetaXPath |
|---|---|
| Author(s): | Curtis E. Dyreson (Washington State University), Michael H. Bohlen and Christian S. Jensen (Aalborg University) |
| Abstract: | This paper presents the MetaXPath data model and query language. MetaXPath extends XPath with support for XML metadata. XPath is a specification language for locations in an XML document. It serves as the basis for XML query languages like XSLT and the XML Query Algebra. The MetaXPath data model is a nested XPath tree. Each level of metadata induces a new level of nesting. The data model separates metadata and data into different dataspaces, supports meta-metadata, and enables sharing of metadata common to a group of nodes without duplication. The MetaXPath query language has a level shift operator to shift a query from a data level to a metadata level. MetaXPath maximally reuses XPath hence the changes needed to support metadata are few. MetaXPath is fully compatible with XPath. |
| Keywords: | Metadata, Query language, XML, xpath |
| pages: | 17-13 |