Is there a way to get the XSLT to run, besides adding the missing attribute to the 45k + sources docs?

...adding a single line of code to ... documents is a straight forward task, it can be easily done with a short .. script, or using SED ... would be quicker and eliminate any potential confusion in the future...

The namespace prefix, unless it is xml or xmlns, must have been declared in a namespace declaration attribute in either the start-tag of the element where the prefix is used or in an an ancestor element (i.e. an element in whose content the prefixed markup occurs). The prefix xml is by definition bound to the namespace name [w3.org...] The prefix xmlns is used only for namespace bindings and is not itself bound to any namespace name.

This constraint may lead to operational difficulties in the case where the namespace declaration attribute is provided, not directly in the XML document entity, but via a default attribute declared in an external entity. Such declarations may not be read by software which is based on a non-validating XML processor. Many XML applications, presumably including namespace-sensitive ones, fail to require validating processors. For correct operation with such applications, namespace declarations must be provided either directly or via default attributes declared in the internal subset of the DTD.