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Asked: 2026-06-02T16:43:59+00:00

I would like know if there is an order defined in which attributes and

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I would like know if there is an order defined in which attributes and namespace definitions can occur in an xml tag element. Let’s assume the following element:

<tag attr1="a1" attr2="a2" xmlns="ThisIsTheNameSpace">value</tag>

So the question is: Must be the xmlns after the attributes or before them or doesn’t it matter.

<tag xmlns="ThisIsTheNameSpace" attr1="a1" attr2="a2">value</tag>

or could it be anywhere like this:

<tag attr1="a1" xmlns="ThisIsTheNameSpace" attr2="a2">value</tag>

Are there any kind of definitions?

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1 Answer

  1. Editorial Team

    According to section 3.1 of the Extensible Markup Language (XML) 1.0 (Fifth Edition), no, the order does not matter.

    Note that the order of attribute specifications in a start-tag or empty-element
tag is not significant.

    http://www.w3.org/TR/REC-xml/#sec-starttags

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