Content lists
The structure of an XPath expression is described by hierarchies of charts. These charts are highly recursive, and it can be difficult to establish which are 'top-level' charts. Nevertheless, significant entry-points include LocationPath{1}, Predicate{8}, Expr{14}, ExprToken{28} and ExprWhitespace{39}. The table below lists the charts in the order that they are defined in the standard, and as they are presented in this chapter:
| 01 LocationPath | 14 Expr | 27 UnaryExpr |
| 02 AbsoluteLocationPath | 15 PrimaryExpr | 28 ExprToken |
| 03 RelativeLocationPath | 16 FunctionCall | 29 Literal |
| 04 Step | 17 Argument | 30 Number |
| 05 AxisSpecifier | 18 UnionExpr | 31 Digits |
| 06 AxisName | 19 PathExpr | 32 Operator |
| 07 NodeTest | 20 FilterExpr | 33 OperatorName |
| 08 Predicate | 21 OrExpr ... |
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