core style info in a derivative style?

Hi–

I seem to remember a discussion about putting the core style url in
the info for a derivative style. Can someone point me to that
discussion or to a style that already implements this?

I.e., Society for Biblical Literature is a derivation of Chicago–how
do I tag it as such?

Thanks,
Elena

Use the link element with a rel value of “template” (maybe not the
most clear term?):

      ## The CSL file URI on which the style is based. Since most
      ## styles are based on a handful of core styles, this can be
      ## useful metadata to see those relationships.
      "template"

Bruce