XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (830 page)

shortcut semantics

boolean predicates

effective boolean value and

boolean() function.
See also
effective boolean value

effective boolean value and

[fn:] prefix and

if
expression and

some
,
every
,
and
,
or
, expressions and

xs:boolean() constructor function
v.

xsl:if and

xsl:when and

booleans

atomic values

conversions to

converting from decimal

converting from double

converting from float

converting from string

converting to other types

definition/description

effective value.
See
effective boolean value

eq
and

false value

lexical representations of

lt
,
le
,
ge
,
gt
, and