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Can I undeclare a prefix — that is, dissociate a prefix from an XML namespace?

April 26, 2017dissociate namespace prefix undeclare XML

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Can I undeclare a prefix — that is, dissociate a prefix from an XML namespace?

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No. You can override a prefix (see question 4.5) or the XML namespace declaration that declares the prefix can go out of scope (see question 6.3), but you can’t undeclare the prefix. (Note that you can undeclare the default XML namespace; for more information, see question 4.8.

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Yes and no. This is supported in version 1.1, but not in version 1.0. As of this writing [January, 2007], most software appears to support version 1.0, so you should not count on this ability. For information about how to undeclare a prefix, see question 4.7. Note that in both version 1.0 and 1.1, you can override a prefix (see question 4.5) or let the XML namespace declaration that declares the prefix go out of scope (see question 6.4). You can also undeclare the default XML namespace (see question 4.8).