Recurrence

Hi all,


   I would like to know if it is possible to do recurrence with XPL language ??

Here is what I would like to do :

My project consist in uploading XML Schema in an eXist database with Orbeon. However, it is possible that some XML Schema have an import element like this : <xs:import namespace="http://www.example.com/test/" schemaLocation="base.xsd"/>

So when I want to upload a XML Schema I have to upload the files including by the import element too.

For example :

  function upload(file){

    save(file)
    for each import element
        upload(file of import element)

  }

Thanks you

creax.



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[hidden email] wrote:

  Hi

>   function upload(file){
>
>     save(file)
>     for each import element
>         upload(file of import element)
>
>   }

  How do you actually do the upload?  If you use XQuery, for example,
the recurrence comes for free.

  Regards,

--drkm
























       

       
               
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The upload is done by an xmldb:insert

How using recurrence with XQuery ?? Do you have an example ?

Thank you very much for your answers

creax






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Hi Damien,

You can have recursive code in XPL as a pipeline can call itself. The
XPL below is an example of recursive pipeline:

<p:config xmlns:p="http://www.orbeon.com/oxf/pipeline"
          xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <p:param type="input" name="data"/>
    <p:param type="output" name="data"/>
    <p:choose href="#data">
        <p:when test="/count = 0">
            <p:processor uri="oxf/processor/identity">
                <p:input name="data" href="#data"/>
                <p:output name="data" ref="data"/>
            </p:processor>
        </p:when>
        <p:otherwise>
            <p:processor uri="oxf/processor/xslt">
                <p:input name="data" href="#data"/>
                <p:output name="data" id="new-value"/>
                <p:input name="config">
                    <xsl:stylesheet version="2.0">
                        <xsl:template match="/">
                            <count><xsl:value-of select="/count - 1"/></count>
                        </xsl:template>
                    </xsl:stylesheet>
                </p:input>
            </p:processor>
            <p:processor uri="oxf/processor/pipeline">
                <p:input name="config" href="oxf:/ops/unit-tests/recurse.xml"/>
                <p:input name="data" href="#new-value"/>
                <p:output name="data" ref="data"/>
            </p:processor>
        </p:otherwise>
    </p:choose>
</p:config>

Alex

On 8/9/06, [hidden email] <[hidden email]> wrote:
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Damien Peymirat wrote:

> The upload is done by an xmldb:insert

> How using recurrence with XQuery ?? Do you have an example ?

  By XQuery, I meant an XQuery script, as with xmldb:query (for
example, eXist has extension functions to do the inserts and updates
directly in XQuery scripts).  If so, as you can define function in
XQuery, you can easily use recursivity.

  Regards,

--drkm






















       
 p4.vert.ukl.yahoo.com uncompressed/chunked Sun Aug 13 13:13:38 GMT 2006
       
               
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