Re: What is a namespace ... really?
>What good is a namespace if it *doesn't* reference a DTD? A good example is XSL. XSL allows the result tree to use any vocabulary the stylesheet writer wants, it could be HTML-in-XML (ie Voyager), the flow object vocabulary or any old DTD. XSL templates contain not only elements in this result vocabulary but also XSL's own elements that control processing, generated content, etc. XSL has element type names like "apply-templates", "value-of" and "number". Now say that the result vocabulary you are wanting to use in your stylesheet just happens to have an element type with the name "number". How would an XSL engine know if <number> meant the XSL "number" element or the "number" element of the result vocabulary? The answer: namespaces Each element is associated with a URI. The XSL element types are associated with a namespace which is the URI for the XSL spec. It doesn't matter what the URI for the result tree namespace is as long as it isn't that of the XSL spec. So in this case, the namespace is a spec that described the elements, not a DTD. Namespaces are *not* a tool for validation of documents with a mixture of schemata, they are merely a way of making sure that my FOO is not confused with your FOO. James 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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