The <xs:assert> element cannot use inheritable attributes?

Hi Folks,

It is my understanding that <xs:assert> elements cannot use inheritable attributes (that is, the xpath expression in the <xs:assert> element's @test attribute cannot reference attributes declared with inheritable="true").

Only <xs:alternative> elements can use inheritable attributes.

Do I have a correct understanding?

If yes, why is it that <xs:assert> elements cannot use inheritable attributes?

/Roger