Provide a means to tell the validation processor to skip elements by name

Under certain circumstances, a user may wish to validate a tree while ignoring 
the content of certain elements, designated by name. This is not dissimilar 
from the need to validate an arbitrarily-named element when a type is known for 
it, though it's a different use case.

The original driving use case: XML-binary Optimized packaging replaces this:

<base64Element>KJJjasdfweLFDKJsvas==</base64Element>

with this:

<base64Element xmime:contentType="application/octet-stream" 
xmlns:xmime="XMIME_NS">
  <xop:Include xmlns:xop="XOP_NS" href="cid:id@id.issuer" />
<base64Element>

The goal is to be able to designate elements which will be accepted as valid, 
but treated as processContents=skip (and wildcard attribute pc=skip, too).

This is considered reasonable; the goal of strict validation is subverted, but 
that's because somebody went to the trouble of doing it.

Original issue reported on code.google.com by aale...@gmail.com on 21 Aug 2013 at 7:35

sshyran / genxdm

Provide a means to tell the validation processor to skip elements by name #136