CachingTest HTTP header re-request

Hey team,
As the CachingTest.xsl stands right now, we don't have an implementation for
how to re-request the HTTP headers and then test the new results against the
old data (the last two tests of 3.2 in Basic Tests). Right now I'm thinking
it might be better to have the xsl call to the java code to perform this
test. As a pseudo implementation:

Take in the old URI and the original value to be tested
Append the specified new request headers, then re-request the page
Perform the comparisons between the original value and the new value
Return a boolean to the xsl as to whether the test passed or failed

However, this clashes with the current implementation of the comparison. For
example:

<xsl:if test="ancestor::HTTPResponse[1]/following-sibling::HTTPResponse[1]
                        and

not(ancestor::HTTPResponse[1]/following-sibling::HTTPResponse[1]/status[@code
= '304'])">

Is anyone attached to this implementation for any specific reason? And if
so, can you explain to me the logic behind the request being implemented
prior to this comparison?

Thanks,
Laura