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Re: Evaluating replace on string-replace

From: Henry S. Thompson <ht@inf.ed.ac.uk>
Date: Wed, 05 Nov 2008 11:43:55 +0000
To: mozer <xmlizer@gmail.com>
Cc: "Norman Walsh" <ndw@nwalsh.com>, public-xml-processing-model-comments@w3.org
Message-ID: <f5br65qpfd0.fsf@hildegard.inf.ed.ac.uk>

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mozer writes:

> It is not clear to me that from *inside* the p:string-replace, the
> XPath evaluation can see the $opos variable
> . . .
> [[[. . . When a _step_ evaluates an XPath expression . . .]]]

Emphasis added

> . . .
>>    <p:string-replace match="/div/@a"
>>                      replace="concat($opos,',',p:iteration-position())"/>

But $opos is not being evaluated by the step.  That was the whole
problem with the original example.  The 'concat...' XPath expression
is being evaluated by the XProc processor itself, to _construct_ the
expression (in this case, "1,1") which the step will evaluate.  The
_processor_ can see the binding of opos just fine.

ht
- -- 
       Henry S. Thompson, School of Informatics, University of Edinburgh
                         Half-time member of W3C Team
      10 Crichton Street, Edinburgh EH8 9AB, SCOTLAND -- (44) 131 650-4440
                Fax: (44) 131 651-1426, e-mail: ht@inf.ed.ac.uk
                       URL: http://www.ltg.ed.ac.uk/~ht/
[mail really from me _always_ has this .sig -- mail without it is forged spam]
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Received on Wednesday, 5 November 2008 11:44:42 UTC

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