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an xsl/xpath question re attribute qualifiers

• From: james anderson <james.anderson@a...>
• To: xml-dev@l...
• Date: Thu, 08 Mar 2001 03:53:00 +0100

I am trying to reconcile the XPath location expressions with the
patterns described for XSL and the forms described for XPointer. I had
thought that they were related.

1. Are the respective BNF descriptions available in a concise form? In
forms which share the same terms?

2. Is there any document which literally unifies them?

2a. For example, I am wondering how something like the id and key
anchors from the xslt description best fit into the xpath grammar.
Something like the following looks ok, but seems a bit ad hoc. Is there
any definitive source on matters of reconciliation?

// [2]  
   AbsoluteLocationPath ::= (SingleSlash RelativeLocationPath? )
                          | AbbreviatedAbsoluteLocationPath
// [2.1]
                          | (Anchor SingleSlash RelativeLocationPath? )

// [3]   
   RelativeLocationPath ::= ( Step SingleSlash RelativeLocationPath )
                          | Step
                          | AbbreviatedRelativeLocationPath

// [4]   
   Step ::= ( AxisSpecifier NodeTest Predicate*)
          | ( NodeTest Predicate*)
          | AbbreviatedStep

// [5]   
   AxisSpecifier ::= (AxisName '::')  // no need to mark the '::'
                   | AbbreviatedAxisSpecifier 

// [5.1] from WD-xslt1.1-20001212
   Anchor ::= IdAnchor | KeyAnchor
   IdAnchor ::= 'id' '(' Literal ')'
   KeyAnchor ::= 'key' '(' Literal ',' Literal ')'

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