variable reference

[John Merrells]

Following on from my namespace question, I see that the XPath 1.0 grammar supports variable references...   VariableReference ::= "$" QName   But, there's no way of binding a value to a variable in the language... so the variables must come from the execution context... but unlike the namespace mapping the XPathQueryService doesn't provide a mechanism for passing this through to the execution engine. Was this a deliberate decision, or has it just not come up before?   John