XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition (759 page)

VarRef

$ QName

page 540

Operator Precedence

The following table lists the precedence of the XPath operators. Operators lower down the table bind more tightly than operators further up the table. So
A or B and C
means
A or
(B and C)
.

Precedence	Operator
1	,
2	for , some , every , if
3	or
4	and
5	eq , ne , lt , le , gt , ge , = ,