- From: Oleg Tkachenko <olegt@multiconn.com>
- Date: Thu, 03 Jan 2002 15:27:55 +0200
- To: www-xpath-comments@w3.org
James Swift wrote:
> Since parentheses may be used for grouping this is obviously allowed,
>
> /foo/bar[ ( fish or cow ) and dog ]
>
> however am I correct in assuming that the following example supplied in the spec is not allowed according to the grammar?
>
> (preceding::foo)[1]
>
> I do understand what it means etc. I just can't work out how (Expr)Predicate is allowed. It's not allowed to have '(' or ')' ina Step either.
Have a look at productions 20 and 15
[20] FilterExpr ::= PrimaryExpr | FilterExpr Predicate
[15] PrimaryExpr ::= VariableReference | '(' Expr ')' | Literal | Number | FunctionCall
--
Oleg Tkachenko
Multiconn International, Israel
Received on Thursday, 3 January 2002 08:26:00 UTC