[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] Query Languages for XML
What query languages are under development for use with XML documents? I'm talking about data management query languages akin to SQL and OQL. I can envision immense repositories of highly dynamic content. It seems to me that such a query language will eventually become necessary to access or change XML documents that are shared among many users. The language would also need to be a standard to ensure that the clients and servers of different vendors will interoperate. Designing a standard that queries a single repository might be relatively straightforward. Designing a standard that allows queries across multiple repositories might be a bit more of a challenge. (Think of a future internet in which documents are related by extended links that assign roles to everything, and imagine performing a read-only query across the whole mesh of globally distributed documents.) I am aware of the SgmlQL and SDQL languages, although I know only what can be gleaned from an hour's browsing on the web. (See http://www.lpl.univ-aix.fr/projects/SgmlQL/ for info on SgmlQL.) I'd rather see something more object-oriented, like ODMG's OQL, or something that uses XML to specify queries. BTW, Microsoft's XML-Data would be quite a boon for such a large XML repository. Clients could use XML to specify new document types or to change existing document types, and the whole DTD schema could itself reside in the repository. One query language could be used to maintain both the data and the DTDs. If the query language were in XML, it itself would be extensible. -- Joe Lapp (Java Apps Developer/Consultant) Unite for Java! - http://www.javalobby.org jlapp@a... 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/ 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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