Remove namespace prefixes from element names (EF2-11)

A few returns write every element with a prefix (<irs:Return>, <irs:ReturnHeader>, ... and one efile: variant). Stripping the default namespace leaves the prefix, so get_keys() finds nothing (KEYS all NA), XPATH and ATTRIBUTES$xpath carry irs:, and only XPATH2 is cleaned. This re-parses such a document with the prefix dropped from every element tag, then strips the default namespace again, so it is parsed exactly like an unprefixed return. Documents with no element in a namespace (all but ~0.001% of returns) are returned unchanged, without re-parsing.

Usage

xml_prefix_strip(doc)

Arguments

doc

An xml2 document, default namespace already stripped.

Value

The document to use: doc itself, or a re-parsed copy.