Meaning of xs:pattern in xs:boolean

Hi,

sorry for another stupid question, but the schema specs seem to be silent on
that.

I see that the boolean type is constrained by xs:pattern. As there are only
four
possible values, I have the impression that patterns do not make much sense
for
booleans, unless the meaning is: "true", if the pattern matches, and "false"
otherwise. Is that the case?


Regards,

Jochen