[Feature request] Add option to remove namespace prefixes

[HiQ-wipa]

Consider the XML:

<a:A xmlns:a="foo.bar"/>

Currently, the task transforms this to:

{
	"a:A": {
		"@xmlns:a": "foo.bar"
	}
}

However, XML processing should be independent of the naming of namespaces (i.e. here the XML should be processed the same even if a is changed to b), which is extremely cumbersome with JSON.

I think there should be an input option to anonymize namespaces, such that the above is instead transformed to:

{
	"A": {
		"@xmlns": "foo.bar"
	}
}

Naturally, the anonymization should be applied recursively to inner elements.

Possible issues:

• Repetition: If the input XML is <a:A xmlns:a="..."><a:B/></a:A>, then there's no need to repeat the namespace URL of a for B, but a trivial implementation probably will.
• Repetition: If the input XML is <a:A xmlns:a="..."><b:B xmlns:b="..."><a:C/></b:B></a:A>, then the namespace URL of a must be repeated for C. This is quite uncommon, since namespaces are typically only used for wrapping. For example, SOAP envelopes use namespace "http://www.w3.org/2003/05/soap-envelope" and the same namespace is typically not used in the SOAP message content.
• Empty namespaces should be handled correctly. For example, <a:A xmlns:a="..."><B/></a:A> should be transformed such that B contains "@xmlns": "".

Will do this myself at some point if I find time...