Is there an XML Schema for XSLT 1.0?

In building a WXS schema for a transformation service, I would like to
incorporate the transforms into the service description directly, rather
than providing URLs or filenames for them.

What I've done is add, in the appropriate places

<import namespace="the-xslt-namespace"/>

and

<any namespace="the-xslt-namespace" process-contents="skip"/>

but if a schema for XSLT were available, I could write, more safely for the
latter:

<element ref="xsl:stylesheet"/>

and get partial validation of the stylesheet (according to the schema).

I found such a schema for XSLT 2.0, but not for XSLT 1.0.  Even a
correct-as-far-as-it-goes unofficial one would probably be adequate for my
needs.

Jeff