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I have a basic question about XML Namespaces, as I just cannot seem to fully grasp the concept. I know how to set up a namespace, and I know how they are used in the document and such; my question is mainly about the URI associated with a namespace. Let's use this as an example: |<x xmlns:edi='http://ecommerce.org/schema'> <!-- the 'price' element's namespace is http://ecommerce.org/schema --> <edi:price units='Euro'>32.18</edi:price> </x>|| Now I'm not too sure how to phrase this question, but here goes: do I have to associate a URI with a namespace? In the above example, what would be the case if there was no xmlns declaration and the ns "edi" was used? I suppose what I am asking is: what is the benefit of declaring an xmlns in the manner xmlns:prefix='URI'? Is information from that URI being used in the XML document somehow? It's all very confusing to me. Also, let's say I have a simple text document located somewhere on my hard drive, like C:\document.txt. If I wanted to define a namespace for that document, such as xmlns:doc='that text document', how exactly would I do so? Is it even needed? Thanks in advance, Dan |
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