XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (820 page)

*

different roles of

expression context

multiplicative operator

on durations

precedence

NameTest

NodeTest

occurrence indicator

quantifier (regex).
See
quantifiers

*?
quantifier (regex).
See also
quantifiers (regex)

+

additive operator

binary

date/time plus duration

precedence

sum() and

unary

character

leading sign

number() and

occurrence indicator

quantifier (regex).
See
quantifiers

+?
quantifier (regex).
See also
quantifiers (regex)

-

additive operator

date/time plus duration

precedence

hyphen.
See
hyphens

minus operator

binary

on date/time values

unary

minus-sign.
See
minus-sign

name character

need for whitespace and

=
operator

every
expression and