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Added: sling/site/trunk/content/site/xslt-processing-pipeline.html
URL: http://svn.apache.org/viewvc/sling/site/trunk/content/site/xslt-processing-pipeline.html?rev=1420577&view=auto
==============================================================================
--- sling/site/trunk/content/site/xslt-processing-pipeline.html (added)
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+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<HTML>
+ <HEAD>
+ <TITLE>Apache Sling - XSLT Processing Pipeline</TITLE>
+ <LINK rel="stylesheet" href="http://sling.apache.org/site/media.data/site.css" type="text/css" media="all">
+ <LINK rel="icon" href="http://sling.apache.org/site/media.data/favicon.ico">
+ <META http-equiv="Content-Type" content="text/html;charset=UTF-8">
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+ <BODY>
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+ </DIV>
+ <DIV class="header">
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+ <DIV class="menu">
+<P><B>Documentation</B><BR class="atl-forced-newline">
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+
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+
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+ <P style="height: 135px"></P>
+ </DIV>
+ <DIV class="main">
+ <DIV class="breadcrump" style="font-size: 80%;">
+<A href="apache-sling.html" title="Apache Sling Website">Apache Sling Website</A> > <A href="apache-sling.html" title="Apache Sling">Apache Sling</A> > <A href="old-stuff.html" title="Old Stuff">Old Stuff</A> > <A href="scriptengineintegration.html" title="ScriptEngineIntegration">ScriptEngineIntegration</A> > <A href="" title="XSLT Processing Pipeline">XSLT Processing Pipeline</A>
+ </DIV>
+
+<P>In the <EM>Apache Sling Scripting W3C XML Processing Support</EM> bundle, Juanjo Vázquez has implemented XSLT processing support for Sling as another new scripting engine, based on the <A href="http://cocoon.apache.org/3.0/" class="external-link" rel="nofollow">Cocoon 3 pipeline engine</A>.</P>
+
+<H2><A name="XSLTProcessingPipeline-Intro"></A>Intro</H2>
+
+<P>An XML pipeline specifies a sequence of operations to be performed on zero or more XML documents. There are a number of advantages to using pipelines above all in terms of separation of concerns. On the other hand, we talk about XSLT processing if the operations in a pipeline are performed executing or applying XSLT stylesheets.</P>
+
+<P>XSLT processing support is implemented in Sling as an scripting engine bundle named <EM>Apache Sling Scripting W3C XML Processing Support</EM>. This bundle is based on the <A href="http://cocoon.apache.org/3.0/" class="external-link" rel="nofollow">Cocoon 3 pipeline engine</A> and uses the <A href="http://www.w3.org/TR/xproc/" class="external-link" rel="nofollow">W3C XProc language</A> in order to specify pipelines to be processed.</P>
+
+<P>For the time being, XProc is partially implemented and it´s not clear that Sling must support all W3C recomendation yet. This could depend of concrete user requirements or use cases.</P>
+
+<P>The source code is found in the <A href="http://svn.apache.org/repos/asf/incubator/sling/trunk/contrib/scripting/xproc" class="external-link" rel="nofollow">contrib/scripting/xproc</A> module.</P>
+
+<H2><A name="XSLTProcessingPipeline-HowtoInstall"></A>How to Install</H2>
+
+<P>Install the <TT>org.apache.sling.scripting.xproc</TT> bundle in order to work with XProc. You can achieve this either building it from <TT>contrib/scripting/xproc</TT> folder in the Sling trunk or by downloading it from the Apache Snapshot repository here: <A href="http://people.apache.org/repo/m2-snapshot-repository/org/apache/sling/org.apache.sling.scripting.xproc/2.0.0-incubator-SNAPSHOT/org.apache.sling.scripting.xproc-2.0.0-incubator-20090403.114403-1.jar" class="external-link" rel="nofollow">org.apache.sling.scripting.xproc-2.0.0-incubator-20090403.114403-1.jar</A>.</P>
+
+<P>To deploy the bundle go to the bundles page of Apache Felix Web Console (<A href="http://localhost:8888/system/console/bundles" class="external-link" rel="nofollow">http://localhost:8888/system/console/bundles</A>), select the bundle file to upload, check the Start check box and click Install or Update button.</P>
+
+<P>In order to check whether XProc scripting engine has been installed, go to the Script Engines page of the Apache Felix Web Console and see the entry for XProc there:</P>
+
+<DIV class="preformatted panel" style="border-width: 1px;"><DIV class="preformattedContent panelContent">
+<PRE>Apache Sling Scripting W3C XML Processing Support, 2.0.0-incubator-SNAPSHOT
+ Language XMLProc, 1.0
+ Extensions xpl
+ MIME Types application/xml
+ Names XProc, xml processing, xml pipeline processor
+</PRE>
+</DIV></DIV>
+
+<H2><A name="XSLTProcessingPipeline-Howitworks"></A>How it works</H2>
+
+<P>As explained above, the bundle is able to perform a sequence of XSLT transforms on an XML document just as is expressed in a pipeline definition. A pipeline definition is a file with an xpl extension that follows the <A href="http://www.w3.org/TR/xproc/" class="external-link" rel="nofollow">W3C XProc grammar</A>. Only <TT>p:xslt</TT> steps are supported at the moment.</P>
+
+<P>For the XML input of pipeline, the processing uses a Cocoon generator named <TT>SlingGenerator</TT> that tries to resolve the requested resource as (in order of preference):</P>
+
+<UL>
+ <LI>an static XML file</LI>
+ <LI>a dynamically generated XML</LI>
+ <LI>the underlying node´s export document view</LI>
+</UL>
+
+
+<H2><A name="XSLTProcessingPipeline-Samples"></A>Samples</H2>
+
+<P>Let´s see some samples in order to understand the processing behaviour.</P>
+
+<P>1. Create some content</P>
+<DIV class="preformatted panel" style="border-width: 1px;"><DIV class="preformattedContent panelContent">
+<PRE>$ curl -F sling:resourceType=xproc -F title="some title" -F text="And some text" http://admin:admin@localhost:8888/foo
+</PRE>
+</DIV></DIV>
+<P>2. Use WebDAV or curl to create a pipeline script at <TT>/apps/xproc/xproc.xpl</TT> :</P>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeContent panelContent">
+<PRE class="code-xml">
+<SPAN class="code-tag"><?xml version=<SPAN class="code-quote">"1.0"</SPAN> encoding=<SPAN class="code-quote">"UTF-8"</SPAN>?></SPAN>
+<SPAN class="code-tag"><p:pipeline <SPAN class="code-keyword">xmlns:p</SPAN>=<SPAN class="code-quote">"http://www.w3.org/ns/xproc"</SPAN>></SPAN>
+
+ <SPAN class="code-tag"><p:xslt></SPAN>
+ <SPAN class="code-tag"><p:input port=<SPAN class="code-quote">"stylesheet"</SPAN>></SPAN>
+ <SPAN class="code-tag"><p:document href=<SPAN class="code-quote">"/apps/xproc/one.xsl"</SPAN>/></SPAN>
+ <SPAN class="code-tag"></p:input></SPAN>
+ <SPAN class="code-tag"></p:xslt></SPAN>
+
+ <SPAN class="code-tag"><p:xslt></SPAN>
+ <SPAN class="code-tag"><p:input port=<SPAN class="code-quote">"stylesheet"</SPAN>></SPAN>
+ <SPAN class="code-tag"><p:document href=<SPAN class="code-quote">"/apps/xproc/two.xsl"</SPAN>/></SPAN>
+ <SPAN class="code-tag"></p:input></SPAN>
+ <SPAN class="code-tag"></p:xslt></SPAN>
+
+<SPAN class="code-tag"></p:pipeline></SPAN>
+</PRE>
+</DIV></DIV>
+<P>3. Store the XSLT transforms in the repository:</P>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeHeader panelHeader" style="border-bottom-width: 1px;"><B>/apps/xproc/one.xsl</B></DIV><DIV class="codeContent panelContent">
+<PRE class="code-xml">
+<<SPAN class="code-keyword">xsl:stylesheet</SPAN> version=<SPAN class="code-quote">"1.0"</SPAN>
+ <SPAN class="code-keyword">xmlns:xsl</SPAN>=<SPAN class="code-quote">"http://www.w3.org/1999/XSL/Transform"</SPAN>>
+
+<SPAN class="code-tag"><<SPAN class="code-keyword">xsl:template</SPAN> match=<SPAN class="code-quote">"/"</SPAN>></SPAN>
+ <SPAN class="code-tag"><one></SPAN>
+ <SPAN class="code-tag"><<SPAN class="code-keyword">xsl:copy-of</SPAN> select=<SPAN class="code-quote">"."</SPAN>/></SPAN>
+ <SPAN class="code-tag"></one></SPAN>
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:template</SPAN>></SPAN>
+
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:stylesheet</SPAN>></SPAN>
+</PRE>
+</DIV></DIV>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeHeader panelHeader" style="border-bottom-width: 1px;"><B>/apps/xproc/two.xsl</B></DIV><DIV class="codeContent panelContent">
+<PRE class="code-xml">
+<<SPAN class="code-keyword">xsl:stylesheet</SPAN> version=<SPAN class="code-quote">"1.0"</SPAN>
+ <SPAN class="code-keyword">xmlns:xsl</SPAN>=<SPAN class="code-quote">"http://www.w3.org/1999/XSL/Transform"</SPAN>>
+
+<SPAN class="code-tag"><<SPAN class="code-keyword">xsl:template</SPAN> match=<SPAN class="code-quote">"/"</SPAN>></SPAN>
+ <SPAN class="code-tag"><two></SPAN>
+ <SPAN class="code-tag"><<SPAN class="code-keyword">xsl:copy-of</SPAN> select=<SPAN class="code-quote">"."</SPAN>/></SPAN>
+ <SPAN class="code-tag"></two></SPAN>
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:template</SPAN>></SPAN>
+
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:stylesheet</SPAN>></SPAN>
+</PRE>
+</DIV></DIV>
+<P>4. Request foo.html to execute the pipeline:</P>
+<DIV class="preformatted panel" style="border-width: 1px;"><DIV class="preformattedContent panelContent">
+<PRE>$ curl http://admin:admin@localhost:8888/foo.html
+
+<?xml version="1.0" encoding="UTF-8"?>
+<two>
+ <one>
+ <foo ...sling:resourceType="xproc" text="And some text" title="some title"/>
+ </one>
+</two>
+</PRE>
+</DIV></DIV>
+
+<P>In this case, the node´s document view has been the pipeline´s source.</P>
+
+<P>5. Now, store an static XML in the repository:</P>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeHeader panelHeader" style="border-bottom-width: 1px;"><B>/foo.xml</B></DIV><DIV class="codeContent panelContent">
+<PRE class="code-xml">
+<SPAN class="code-tag"><?xml version=<SPAN class="code-quote">"1.0"</SPAN> encoding=<SPAN class="code-quote">"UTF-8"</SPAN>?></SPAN>
+<SPAN class="code-tag"><foo></SPAN>
+ <SPAN class="code-tag"><content></SPAN>
+ foo: static content
+ <SPAN class="code-tag"></content></SPAN>
+<SPAN class="code-tag"></foo></SPAN>
+</PRE>
+</DIV></DIV>
+
+<P>6. Again, request foo.html to execute the pipeline:</P>
+<DIV class="preformatted panel" style="border-width: 1px;"><DIV class="preformattedContent panelContent">
+<PRE>$ curl http://admin:admin@localhost:8888/foo.html
+
+<?xml version="1.0" encoding="UTF-8"?>
+<two>
+ <one>
+ <foo>
+ <content>
+ foo: static content
+ </content>
+ </foo>
+ </one>
+</two>
+</PRE>
+</DIV></DIV>
+
+<P>This time the pipeline´s source has been an static XML file.</P>
+
+<P>7. Store an script in the repository:</P>
+<DIV class="code panel" style="border-width: 1px;"><DIV class="codeHeader panelHeader" style="border-bottom-width: 1px;"><B>/apps/xproc/xproc.xml.esp</B></DIV><DIV class="codeContent panelContent">
+<PRE class="code-xml">
+<SPAN class="code-tag"><?xml version=<SPAN class="code-quote">"1.0"</SPAN> encoding=<SPAN class="code-quote">"UTF-8"</SPAN>?></SPAN>
+<SPAN class="code-tag"><foo></SPAN>
+ <SPAN class="code-tag"><content></SPAN>
+ foo: dynamic content
+ <SPAN class="code-tag"></content></SPAN>
+<SPAN class="code-tag"></foo></SPAN>
+</PRE>
+</DIV></DIV>
+
+<P>8. Delete previous static xml file (/foo.xml).</P>
+
+<P>9. Request foo.html to execute the pipeline:</P>
+<DIV class="preformatted panel" style="border-width: 1px;"><DIV class="preformattedContent panelContent">
+<PRE>$ curl http://admin:admin@localhost:8888/foo.html
+
+<?xml version="1.0" encoding="UTF-8"?>
+<two>
+ <one>
+ <foo>
+ <content>
+ foo: dynamic content
+ </content>
+ </foo>
+ </one>
+</two>
+</PRE>
+</DIV></DIV>
+
+<P>This time the pipeline´s source has been a dinamically generated XML.</P>
+
+<H2><A name="XSLTProcessingPipeline-References"></A>References</H2>
+
+<UL>
+ <LI><A href="http://cocoon.apache.org/3.0/" class="external-link" rel="nofollow">Cocoon 3 pipeline engine</A></LI>
+ <LI><A href="http://www.w3.org/TR/xproc/" class="external-link" rel="nofollow">W3C XProc language</A></LI>
+ <LI><A href="https://issues.apache.org/jira/browse/SLING-893" class="external-link" rel="nofollow">SLING-893</A></LI>
+ <LI><A href="http://markmail.org/thread/33h5nhk5e3mswrue" class="external-link" rel="nofollow">Mail list discussion</A></LI>
+</UL>
+
+ <DIV class="timestamp" style="margin-top: 30px; font-size: 80%; text-align: right;">
+Last modified by jvazquez on 2009-04-07 02:46:22.0
+ </DIV>
+ <DIV class="trademarkFooter">
+Apache Sling, Sling, Apache, the Apache feather logo, and the Apache Sling project logo are trademarks of The Apache Software Foundation. All other marks mentioned may be trademarks or registered trademarks of their respective owners.
+ </DIV>
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+
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--- sling/site/trunk/content/site/xstl-processing-pipeline.html (added)
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+
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<HTML>
+ <HEAD>
+ <TITLE>Apache Sling - XSTL Processing Pipeline</TITLE>
+ <LINK rel="stylesheet" href="http://incubator.apache.org/sling/site/media.data/site.css" type="text/css" media="all">
+ <LINK rel="icon" href="http://incubator.apache.org/sling/site/media.data/favicon.ico">
+ <META http-equiv="Content-Type" content="text/html;charset=UTF-8">
+ </HEAD>
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+ <IMG border="0" alt="Apache Sling" src="http://incubator.apache.org/sling/site/media.data/logo.png">
+ </A>
+ </DIV>
+ <DIV class="header">
+ <A href="http://incubator.apache.org/">
+ <IMG border="0" alt="Apache Incubator" src="http://incubator.apache.org/images/apache-incubator-logo.png">
+ </A>
+ </DIV>
+ </DIV>
+ <DIV class="menu">
+
+
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+<UL>
+ <LI><A href="documentation.html" title="Documentation">Documentation</A></LI>
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+
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+ <DIV class="main">
+
+
+<P>In the <EM>Apache Sling Scripting W3C XML Processing Support</EM> bundle, Juan Jo Vazquez has implemented XLST processing support for Sling as another new scripting engine.</P>
+
+<TABLE cellpadding="5" width="85%" cellspacing="8px" class="noteMacro" border="0" align="center"><COLGROUP><COL width="24"><COL></COLGROUP><TR><TD valign="top"><IMG src="http://cwiki.apache.org/confluence/images/icons/emoticons/warning.gif" width="16" height="16" align="absmiddle" alt="" border="0"></TD><TD><B class="strong">Simple</B><BR>
+<P>This is the first very simple sample which Bertrand Delacretaz has posted to Sling developers list. More samples and completion to come.</P></TD></TR></TABLE>
+
+
+
+<P>1. Install the <TT>org.apache.sling.scripting.xproc</TT> bundle by either building it from <TT>contrib/scripting/xproc</TT> folder in the Sling trunk or by dowloading it from the Apache Snapshot repository here: <SPAN class="nobr"><A href="http://people.apache.org/repo/m2-snapshot-repository/org/apache/sling/org.apache.sling.scripting.xproc/2.0.0-incubator-SNAPSHOT/org.apache.sling.scripting.xproc-2.0.0-incubator-20090403.114403-1.jar" title="Visit page outside Confluence" rel="nofollow">org.apache.sling.scripting.xproc-2.0.0-incubator-20090403.114403-1.jar<SUP><IMG class="rendericon" src="http://cwiki.apache.org/confluence/images/icons/linkext7.gif" height="7" width="7" align="absmiddle" alt="" border="0"></SUP></A></SPAN></P>
+
+<P>2. Create some content</P>
+
+<DIV class="preformatted"><DIV class="preformattedContent">
+<PRE>$ curl -F sling:resourceType=xproc -F title="some title" -F text="And some text" http://admin:admin@localhost:8888/foo
+</PRE>
+</DIV></DIV>
+
+<P>3. Create a pipeline script at <TT>/apps/xproc/xproc.xpl</TT> :</P>
+
+<DIV class="code"><DIV class="codeContent">
+<PRE class="code-xml"><SPAN class="code-tag"><?xml version=<SPAN class="code-quote">"1.0"</SPAN> encoding=<SPAN class="code-quote">"UTF-8"</SPAN>?></SPAN>
+<SPAN class="code-tag"><p:pipeline <SPAN class="code-keyword">xmlns:p</SPAN>=<SPAN class="code-quote">"http://www.w3.org/ns/xproc"</SPAN>></SPAN>
+
+ <SPAN class="code-tag"><p:xslt></SPAN>
+ <SPAN class="code-tag"><p:input port=<SPAN class="code-quote">"stylesheet"</SPAN>></SPAN>
+ <SPAN class="code-tag"><p:document href=<SPAN class="code-quote">"/apps/xproc/one.xsl"</SPAN>/></SPAN>
+ <SPAN class="code-tag"></p:input></SPAN>
+ <SPAN class="code-tag"></p:xslt></SPAN>
+
+ <SPAN class="code-tag"><p:xslt></SPAN>
+ <SPAN class="code-tag"><p:input port=<SPAN class="code-quote">"stylesheet"</SPAN>></SPAN>
+ <SPAN class="code-tag"><p:document href=<SPAN class="code-quote">"/apps/xproc/two.xsl"</SPAN>/></SPAN>
+ <SPAN class="code-tag"></p:input></SPAN>
+ <SPAN class="code-tag"></p:xslt></SPAN>
+
+<SPAN class="code-tag"></p:pipeline></SPAN></PRE>
+</DIV></DIV>
+
+<P>4. Store the XSLT transforms in the repository:</P>
+
+<DIV class="code"><DIV class="codeHeader"><B>/apps/xproc/one.xsl</B></DIV><DIV class="codeContent">
+<PRE class="code-xml"><<SPAN class="code-keyword">xsl:stylesheet</SPAN> version=<SPAN class="code-quote">"1.0"</SPAN>
+ <SPAN class="code-keyword">xmlns:xsl</SPAN>=<SPAN class="code-quote">"http://www.w3.org/1999/XSL/Transform"</SPAN>
+>
+
+<SPAN class="code-tag"><<SPAN class="code-keyword">xsl:template</SPAN> match=<SPAN class="code-quote">"/"</SPAN>></SPAN>
+ <SPAN class="code-tag"><one></SPAN>
+ <SPAN class="code-tag"><<SPAN class="code-keyword">xsl:copy-of</SPAN> select=<SPAN class="code-quote">"."</SPAN>/></SPAN>
+ <SPAN class="code-tag"></one></SPAN>
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:template</SPAN>></SPAN>
+
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:stylesheet</SPAN>></SPAN></PRE>
+</DIV></DIV>
+
+<DIV class="code"><DIV class="codeHeader"><B>/apps/xproc/two.xsl</B></DIV><DIV class="codeContent">
+<PRE class="code-xml"><<SPAN class="code-keyword">xsl:stylesheet</SPAN> version=<SPAN class="code-quote">"1.0"</SPAN>
+ <SPAN class="code-keyword">xmlns:xsl</SPAN>=<SPAN class="code-quote">"http://www.w3.org/1999/XSL/Transform"</SPAN>
+>
+
+<SPAN class="code-tag"><<SPAN class="code-keyword">xsl:template</SPAN> match=<SPAN class="code-quote">"/"</SPAN>></SPAN>
+ <SPAN class="code-tag"><two></SPAN>
+ <SPAN class="code-tag"><<SPAN class="code-keyword">xsl:copy-of</SPAN> select=<SPAN class="code-quote">"."</SPAN>/></SPAN>
+ <SPAN class="code-tag"></two></SPAN>
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:template</SPAN>></SPAN>
+
+<SPAN class="code-tag"></<SPAN class="code-keyword">xsl:stylesheet</SPAN>></SPAN></PRE>
+</DIV></DIV>
+
+<P>5. Request foo.html to execute the pipeline:</P>
+
+<DIV class="preformatted"><DIV class="preformattedContent">
+<PRE>$ curl http://admin:admin@localhost:8888/foo.html
+
+<?xml version="1.0" encoding="UTF-8"?>
+<two>
+ <one>
+ <foo ...sling:resourceType="xproc" text="And some text" title="some title"/>
+ </one>
+</two>
+</PRE>
+</DIV></DIV>
+ </DIV>
+ </BODY>
+</HTML>
+
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