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On 15/09/2010 9:43 PM, Costello, Roger L. wrote: > Michael Kay wrote: > >> I actually came across one usage of XML in which the namespace >> declaration in >> >> <a xmlns:v="http://www.x.com/"/> >> >> was considered significant. They were using it, rather as some people >> use processing instructions or comments, as a device for adding >> information to an XML document (in this case, a kind of version >> attribute) without having to modify the schema. > What do you think about that? Is it a good idea? > > Until I saw that I was ready to pronounce all unused namespaces as evil, I'm reluctant to moralise about technical decisions. I'm a pragmatist. Do what best meets the project requirements (balancing the short-term requirements against the long-term requirements, stated or unstated). I don't know the requirements of this project, so I can't judge whether this was an optimal design. Generally, any attempt to circumvent a schema suggests a degree of short-termism, but there are times when short-termism is appropriate. If there really is no alternative to circumventing the schema in this kind of way, I think I would generally choose to add processing instructions rather than namespace declarations, but neither is very attractive. Michael Kay Saxonica
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