DevOps, CI/CD and Automation

This is a newbie question your suggestions will greatly be appreciated-

I have a need to get a Id from a sequence in the database into the XML document before it gets loaded into the database itself.
I have a XSQL that will get it for me but when I do a <xsl:include href=URI> or <xsl:import href=URI> nothing gets done on the output of oraxsl. To make matters more complicated we run a Secure https so the URI points to a https site to get the Id.

Is these any way I can call a XSQL from a XSL file?

thanks
Subie