Caching of XML Files

[Matthew James Hanson]

Hi!

I have a series of XML files that are used by any stylesheet via the XSL
document(...) function:

<xsl:value-of select="document('file.xml')/someElement[someAttr =
$matchVal]/@theDataAttr"/>

Do I need to worry heavy use of these XML files and I/O causing performance
problems during the XSL transformation?  If so, is there a caching mechanism
that I can use?

Thanks!
Matt Hanson!