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Re: In-scope variable bindings in p:variable

From: Norman Walsh <ndw@nwalsh.com>
Date: Mon, 21 Jun 2010 10:43:42 -0400
To: public-xml-processing-model-wg@w3.org
Message-ID: <m2k4psigyp.fsf@nwalsh.com>
"Toman_Vojtech@emc.com" <Toman_Vojtech@emc.com> writes:
> When responding to a question on xproc-dev today
> (http://lists.w3.org/Archives/Public/xproc-dev/2010Jun/0041.html), I

Sigh. I am so far behind again.

> realized that the spec is perhaps a bit unclear about the in-scope
> variable bindings that are in scope for p:variable/@select. More
> specifically, is the following allowed?
>
> <p:variable name="x" select="'foo'"/>
> <p:variable name="y" select="$x"/>
>
> If so, where does it follow from?

The third paragraph of 5.7.1 says, of p:variable, in part:

  ...with the addition of bindings for all preceding-sibling
  p:variable and p:option elements.

So I think the example above is pretty clearly allowed.

> Based on the xproc-dev discussion, it
> looks like Calabash does not support this - but Calumet does.

That's news to me; given pipe.xpl:

<p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="1.0">
<p:output port="result"/>

<p:variable name="y" select="'foo'"/>
<p:variable name="x" select="$y"/>

<p:add-attribute match="/*" attribute-name="test">
  <p:input port="source">
    <p:inline><doc/></p:inline>
  </p:input>
  <p:with-option name="attribute-value" select="$x"/>
</p:add-attribute>

</p:declare-step>

I get:

$ calabash /projects/src/calabash/pipe.xpl
INFO: Running pipeline !1
INFO: Running add-attribute !1.4
<doc test="foo"/>

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | "Bother", said Pooh, as he deleted his
http://nwalsh.com/            | root directory.

Received on Monday, 21 June 2010 14:44:20 GMT

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