Read XSLT 2.0 and XPath 2.0 Programmer's Reference, 4th Edition Online
Authors: Michael Kay
OrExpr | AndExpr ( or AndExpr )* | page 594 |
ParenthesizedExpr | ( Expr? ) | page 542 |
PathExpr | ( / RelativePathExpr?) | ( // RelativePathExpr) | RelativePathExpr | page 625 |
PITest | processing-instruction ( (NCName | StringLiteral)? ) | page 616 |