Syntax

The full syntax for a path expression is as follows:

<path_name> ::= $<path>

<path> ::= [ / ] [ <levels> ] <level_name>

<levels> ::= <level> { / <level> }

<level> ::= <level_name>

                     ...

                     '<any_characters>'

<level_name> ::= { <alphanumeric > | _ | * | ? | \ }