XSL Import using relative location from within a jar.

Hello All,
I have a stylesheet that exists within a jar.  Is there a way to write a
relative href which points to a url outside of the jar?

Example: bar.xsl exists in: com.company.foo.bar.xsl
location of xsl I wish to import:
../../../user-defined-xsl/import_this_xsl.xsl  (the user-defined-xsl
directory is on the same level as the jar file).

...
<xsl:import href="../../../user-defined-xsl/import_this_xsl.xsl"/>
...

Gives an exception.  I am using Xalan.

Thanks.