Subject: RE: [xsl] XPath 1.0 issue From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Tue, 15 Feb 2005 14:37:21 -0000 |
'(' and ')' appear as separate terminals in the grammar, therefore a space is allowed between them. (They are listed separately in this production rule, and also in the list of ExprToken symbols in rule [28].) If the grammar had been written as '()' (compare production [5] which uses '::', and production [12] which uses '..') then no space would be permitted. It's the fact that VariableReference ('$' QName) is an ExprToken that ensures no space is allowed after the '$'. The rule is "Whitespace may be freely added before or after any ExprToken", and by implication, not within an ExprToken; the definition of ExprToken is in the following section. Michael Kay http://www.saxonica.com/ > -----Original Message----- > From: Jack Matheson [mailto:jack@xxxxxxxxxxxxxx] > Sent: 15 February 2005 13:55 > To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx > Subject: [xsl] XPath 1.0 issue > > Xalan and Saxon both allow an arbitrary number of space characters > between the parenthesis in a node test, and I was > wondering if this is technically legal in XPath 1.0. > > An example would be: > <xsl:apply-templates select="node( )"/> > > The XPath TR specifically states that whitespace can exist between > tokens, but I'm not exactly sure how "token" is defined after reading > the recent thread concerning "$ varname". > > A node test in the XPath TR is defined as: > > [7] NodeTest ::= NameTest > | NodeType '(' ')' > | 'processing-instruction' '(' > Literal ')' > > Can anyone explain this to me?
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