and: op:boolean-and(boolean $value1, boolean $value2) => boolean
and
op:boolean-and(boolean $value1, boolean $value2) => boolean
or: op:boolean-or(boolean $value1, boolean $value2) => boolean
or
op:boolean-or(boolean $value1, boolean $value2) => boolean
eq: op:boolean-equal(boolean? $value1, boolean? $value2) => boolean?
eq
op:boolean-equal(boolean? $value1, boolean? $value2) => boolean?
fn:not(boolean? $srcval) => boolean