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1. Document base architecture
1.1 Elements of terminology
The document access and retrieval functions are based on the representation provided by the storage function. This representation corresponds to a metastructure that is independent of the characteristics of the set of documents to be stored, which themselves have their own structure.
In the context of document databases, the concept of structure is fundamental, given the multiple structures that can be attached to a document: physical, logical, semantic, syntactic, graphic, temporal, hypertextual, linguistic, rhetorical, discourse structures, presentation, etc. Informally, a document is considered to be an assembly of labeled, possibly typed elements (document fragments), referred to as "document units". This assembly respects a certain...
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Document base architecture
Integration of semi-structured documents
Appendix: Sample queries
This illustration is based on the formulation of queries on an example document in SgmlQL.
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Example document (figure 1 and corresponding locator)
Note :Note...
References
In Techniques de l'Ingénieur, Computer Science section
Some reference sites for query languages
SgmlQL, an extension of the OQL language for querying SGML documents :
http://www.univ-tln.fr/~gect/simm/SgmlQL
LOREL, OQL extension with construction of generalized access paths in a graph :
http://www-db.stanford.edu/lore
XML-QL, proposal submitted to the W3 consortium: query language for XML documents,...
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