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RE: Handle the first document in a sequence

From: <vojtech.toman@emc.com>
Date: Wed, 2 Feb 2011 03:22:44 -0500
To: <xproc-dev@w3.org>
Message-ID: <3799D0FD120AD940B731A37E36DAF3FE32B15AFCC8@MX20A.corp.emc.com>
Another way is to use <p:split-sequence test="position()=1"> and then store what appears on the "matched" output port. Especially if the number and size input documents are large, this approach might be more efficient than using p:wrap.

Regards,
Vojtech


--
Vojtech Toman
Consultant Software Engineer
EMC | Information Intelligence Group
vojtech.toman@emc.com
http://developer.emc.com/xmltech


> -----Original Message-----
> From: xproc-dev-request@w3.org [mailto:xproc-dev-request@w3.org] On
> Behalf Of Philip Fennell
> Sent: Wednesday, February 02, 2011 7:00 AM
> To: Florent Georges; XProc Dev
> Subject: RE: Handle the first document in a sequence
> 
> Florent,
> 
> Provided you wrap the sequence first, you can use a 'select' on the
> input source port:
> 
> <p:declare-step xmlns:p="http://www.w3.org/ns/xproc"
> 	xmlns:c="http://www.w3.org/ns/xproc-step" version="1.0">
> 	<p:input port="source" sequence="true">
> 		<p:inline><one/></p:inline>
> 		<p:inline><two/></p:inline>
> 		<p:inline><three/></p:inline>
> 	</p:input>
> 	<p:output port="result"/>
> 
> 	<p:wrap-sequence wrapper="seq"/>
> 	<p:identity>
> 		<p:input port="source" select="seq/*[1]"/>
> 	</p:identity>
> </p:declare-step>
> 
> 
> which returns:
> 
> <one/>
> 
> 
> Regards
> 
> Philip Fennell
> Consultant
> MarkLogic Corporation
> 
> 88 Wood Street, London. EC2V 7RS
> 
> Mobile: +44 (0) 7824 830 866
> 
> email  Philip.Fennell@marklogic.com
> web    www.marklogic.com
> 
> 
> 
> -----Original Message-----
> From: xproc-dev-request@w3.org [mailto:xproc-dev-request@w3.org] On
> Behalf Of Florent Georges
> Sent: 02 February, 2011 12:36 AM
> To: XProc Dev
> Subject: Handle the first document in a sequence
> 
>   Hi,
> 
>   I have a step that looks like the following:
> 
>     <p:declare-step type="..." name="mine">
>        <p:input port="doc" primary="true"/>
>        <p:input port="seq" sequence="true"/>
>        <p:store>
>           <p:input port="source">
>              <p:pipe port="seq" step="mine"/>
>           </p:input>
>        </p:store>
>        ...
> 
>   Basically, it declares 2 ports: one is the primary, and the
> other accepts a sequence of documents.  It has to store the first
> document in the sequence.  Of course, the above excerpt is wrong,
> because the source port of p:store does not accept sequences.
> 
>   How can p:store access only to the first doc?
> 
>   I thought about using p:for-each and p:iteration-position() (to
> test if the current doc is the first doc), but I thought there
> must be something simpler.
> 
>   Did I miss something?  Regards,
> 
> --
> Florent Georges
> http://fgeorges.org/
> 
> 
Received on Wednesday, 2 February 2011 08:24:31 GMT

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