Xsl:import or xsl:include for ESB projects ?

Question

I have an XSLT stylesheet transformer in a routing service on the ESB, and it uses an <xsl:import> of another stylesheet. I have forced the auxiliary stylesheet into the project zip for deployment alongside the main stylesheet, but the XSLT engine cannot resolve the imported file, the error is either:
"No protocol" if I just use "foo.xsl"
"FileNotFound if I try "file:foo.xsl"
The XSLT engine should import a relative URI wrt the main stylesheet, but it appears it cannot handle relative URIs, and what it's really expecting is a file: or classpath: protocol.
Any ideas what URI incantation I need for it to locate the imported stylesheet ?
Mik

Answer 1

A bit of reverse engineering of the error message, reveals the shocking fact that I have to use this URI:
<xsl:import href="esb:///ESB_Projects/MyProject_esb/foo.xsl" />
So the stylesheets have to be modified from the original form used outside the ESB, and even changed depending on the project which contains them !
Please tell me there's a better way ?
Mik