Why does iso_svrl_for_xslt2.xsl specify version="1.0"?

Hi Folks,

Schematron question ... 

There is a file whose name is iso_svrl_for_xslt2.xsl

That filename seems to suggest it is an XSLT 2.0 stylesheet.

But when I open the file, I see this:

<xsl:stylesheet version="1.0" ...

Why?

/Roger