Read XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition Online
Authors: Michael Kay
UnionExpr | IntersectExceptExpr ( ( union | | ) IntersectExceptExpr )* |
IntersectExceptExpr | InstanceOfExpr ( ( intersect | except ) InstanceOfExpr )* |
InstanceofExpr | TreatExpr ( instance of SequenceType )? |
TreatExpr | CastableExpr ( treat as SequenceType )? |