RE: object databases
Paul Prescod: > You didn't really answer my question. If Oracle 8i provides the same > support for "graphs of data with links and annotations" that > ObjectDesign then in what sense is it NOT an object database. I'm still > asking for a definition. There are a number of definitions of an "object database", but a minimal definition requires it to be a container of "objects" - which include behaviour (interfaces and methods) as well as structure. Plus a type hierarchy, plus persistent identifiers... Rather more than just graph structures. The main area where the "pure object" db vendors differ from the "extended relational" vendors is in insisting that the concept of object database also implies persistent programming, i.e. access to persistent objects using the same syntax as transient variables. Also they typically have a completely different internal architecture which optimises the performance of navigation and retrieval of composite objects at the expense of ad-hoc query. Mike Kay xml-dev: A list for W3C XML Developers. To post, mailto:xml-dev@i... Archived as: http://www.lists.ic.ac.uk/hypermail/xml-dev/ and on CD-ROM/ISBN 981-02-3594-1 To (un)subscribe, mailto:majordomo@i... the following message; (un)subscribe xml-dev To subscribe to the digests, mailto:majordomo@i... the following message; subscribe xml-dev-digest List coordinator, Henry Rzepa (mailto:rzepa@i...)
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