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Summary: Structured Document Storage and Re ned
Declarative and Navigational Access Mechanisms in
HyperStorM y
Klemens Bohm, Karl Aberer, Erich J. Neuhold, and Xiaoya Yang
GMD-IPSI, Dolivostra e 15, 64293 Darmstadt, Germany
fkboehm, aberer, neuhold, yangxg@darmstadt.gmd.de
Abstract
The combination of SGML and database technology allows to re ne
both declarative and navigational access mechanisms for structured
document collection: with regard to declarative access, the user can
formulate complex information needs without knowing a query lan-
guage, the respective document-type de nition or the underlying mod-
elling. Navigational access is eased by hyperlink-rendition mechanisms
going beyond plain link-integrity checking. With our approach, the
database-internal representation of documents is con gurable. It al-
lows for an e cient implementation of operations, because DTD knowl-
edge is not needed for document structure recognition. We show how
the number of method invocations and the cost of parsing can be sig-
ni cantly reduced.
Keywords: OODBMSs, SGML, document query languages, navigation
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