[Xsltforms-support] indirect indexing through an instance: what is it supposed to do?

[Efraim F. <efr...@gm...>]

Hi,

I'm attaching a test case for a possible bug in XSLTForms. An indirect 
reference to an item in a nodeset through a numeric index stored in an 
instance fails (by referencing the first item) unless the index is 
explicitly typecast to be a number.

The examples I give are:
  Direct: <xf:output ref="instance('data')//html:ul/html:li[2]"/><br/>
  Indirect (without a cast): <xf:output 
ref="instance('data')//html:ul/html:li[instance('index')/n]"/><br/>
  Indirect (cast to a number): <xf:output 
ref="instance('data')//html:ul/html:li[number(instance('index')/n)]"/>

There are two ways the test in the "Indirect (without a cast)" case can 
be interpreted, though: Take the value, cast it to a number and treat it 
as an index (what I want it to do), or treat the index as a node test; 
if the node exists/is > 0, evaluate to true(), otherwise, evaluate to 
false(). I'm not sure which would be the correct behavior in XPath 1.0!

I'm using the latest XSLTForms from svn (rev 508)

Thanks,

-- 
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Efraim Feinstein
Lead Developer
Open Siddur Project
http://opensiddur.net
http://wiki.jewishliturgy.org