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Output from for-each that gets evaluated zero times

From: Norman Walsh <ndw@nwalsh.com>
Date: Fri, 25 Jan 2008 11:17:33 -0500
To: public-xml-processing-model-comments@w3.org
Message-ID: <m2bq79g9r6.fsf@nwalsh.com>
Consider the following step:

<p:for-each>
  <p:iteration-source>
    <p:inline><doc1/></p:inline>
    <p:inline><doc2/></p:inline>
    <p:inline><doc3/></p:inline>
  </p:iteration-source>
  <p:output port="identity">
  <p:output port="hello">
    <p:inline>
      <p>Hello World</p>
    </p:inline>
  </p:output>
  <p:identity/>
</p:for-each>

I assume that the output on the 'identity' port is (doc1,doc2,doc3) and
the output on the 'hello' port is three documents, each consisting of
"<p>Hello World</p>"

Right so far?

Now consider this step:

<p:for-each>
  <p:iteration-source>
    <p:empty/>
  </p:iteration-source>
  <p:output port="identity">
  <p:output port="hello">
    <p:inline>
      <p>Hello World</p>
    </p:inline>
  </p:output>
  <p:identity/>
</p:for-each>

What does it produce? I assume an empty sequence on both output ports, right?

                                        Be seeing you,
                                          norm

-- 
Norman Walsh <ndw@nwalsh.com> | Everything should be made as simple as
http://nwalsh.com/            | possible, but no simpler.

Received on Friday, 25 January 2008 16:17:48 GMT

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