Note: If you are using JDK 1.4 or higher, this task does not require external librariesnot supplied in the Apache Ant distribution. However, often the built in XSL engine is not as upto date as a fresh download, so an update is still highly recommended in particular since the built-in XSLT processors of Java 5 (and to a certain extent Java 6) are known to have serious issues.See Library Dependencies for more information.

It is possible to refine the set of files that are being processed. This can bedone with the includes, includesfile, excludes, excludesfile and defaultexcludesattributes. With the includes or includesfile attribute you specify the files you want tohave included by using patterns. The exclude or excludesfile attribute is used to specifythe files you want to have excluded. This is also done with patterns. Andfinally with the defaultexcludes attribute, you can specify whether youwant to use default exclusions or not. See the section on directory based tasks, on how theinclusion/exclusion of files works, and how to write patterns.

This task forms an implicit FileSet and supports all attributes of <fileset> (dir becomes basedir) as well as the nested <include>, <exclude> and <patternset> elements.

Note: Unlike other similar tasks, this task treatsdirectories that have been matched by the include/exclude patterns ofthe implicit fileset in a special way. It will apply the stylesheetsto all files contain in them as well. Since the default includepattern is ** this means it will apply the stylesheet toall files. If you specify an excludes pattern, it may still work onthe files matched by those patterns because the parent directory hasbeen matched. If this behavior is not what you want, set thescanincludedirectories attribute to false.

Starting with Ant 1.7 this task supports nested resource collectionsin addition to (or instead of, depending on the useImplicitFilesetattribute) the implicit fileset formed by this task.

This task supports the use of a nested <param> element which is used to pass values to an <xsl:param> declaration.

This task supports the use of a nested xmlcatalogelement which is used to perform Entity and URI resolution.

Parameters

Attribute	Description	Required
basedir	where to find the source XML file, default is the project's basedir.	No
destdir	directory in which to store the results.	Yes, unless in and out have been specified.
extension	desired file extension to be used for the targets. If not specified, the default is ".html". Will be ignored if a nested `<mapper>` has been specified.	No
style	name of the stylesheet to use - given either relative to the project's basedir or as an absolute path. Alternatively, a nested element which ant can interpret as a resource can be used to indicate where to find the stylesheet deprecated variation : If the stylesheet cannot be found, and if you have specified the attribute basedir for the task, ant will assume that the style attribute is relative to the basedir of the task.	No, if the location of the stylesheet is specified using a nested <style> element
classpath	the classpath to use when looking up the XSLT processor.	No
classpathref	the classpath to use, given as reference to a path defined elsewhere.	No
force	Recreate target files, even if they are newer than their corresponding source files or the stylesheet.	No; default is false
processor	name of the XSLT processor to use. Permissible value is : "trax" for a TraX compliant processor (ie JAXP interface implementation such as Xalan 2 or Saxon) Defaults to trax. Support for xalan1 has been removed in ant 1.7.	No
includes	comma- or space-separated list of patterns of files that must be included. All files are included when omitted.	No
includesfile	the name of a file. Each line of this file is taken to be an include pattern	No
excludes	comma- or space-separated list of patterns of files that must be excluded. No files (except default excludes) are excluded when omitted.	No
excludesfile	the name of a file. Each line of this file is taken to be an exclude pattern	No
defaultexcludes	indicates whether default excludes should be used or not ("yes"/"no"). Default excludes are used when omitted.	No
in	specifies a single XML document to be styled. Should be used with the out attribute.	No
out	specifies the output name for the styled result from the in attribute.	No
scanincludeddirectories	If any directories are matched by the includes/excludes patterns, try to transform all files in these directories. Default is `true`	No
reloadstylesheet	Control whether the stylesheet transformer is created anew for every transform opertaion. If you set this to true, performance may suffer, but you may work around a bug in certain Xalan-J versions. Default is `false`. Since Ant 1.5.2.	No
useImplicitFileset	Whether the implicit fileset formed by this task shall be used. If you set this to false you must use nested resource collections - or the in attribute, in which case this attribute has no impact anyway. Default is `true`. Since Ant 1.7.	No
filenameparameter	Specifies a xsl parameter for accessing the name of the current processed file. If not set, the file name is not passed to the transformation. Since Ant 1.7.	No
filedirparameter	Specifies a xsl parameter for accessing the directory of the current processed file. For files in the current directory a value of '.' will be passed to the transformation. If not set, the directory is not passed to the transformation. Since Ant 1.7.	No
supressWarnings	Whether processor warnings shall be suppressed. This option requires support by the processor, it is supported by the trax processor bundled with Ant. Since Ant 1.8.0.	No, default is false.
failOnError	Whether the build should fail if any error occurs. Note that transformation errors can still be surpressed by setting failOnTransformationError to false even if this attribute is true. Since Ant 1.8.0.	No, default is true.
failOnTransformationError	Whether the build should fail if an error occurs while transforming the document. Note that this attribute has no effect of `failOnError` is false. Since Ant 1.8.0.	No, default is true.
failOnNoResources	Whether the build should fail if the nested resource collection is empty. Note that this attribute has no effect of `failOnError` is false. Since Ant 1.8.0.	No, default is true.

Parameters specified as nested elements

any resourcecollection

since Ant 1.7

Use resource collections to specify resources that the stylesheetshould be applied to. Use a nested mapper and the task's destdirattribute to specify the output files.

classpath

The classpath to load the processor from can be specified via anested <classpath>, as well - that is, apath-like structure.

xmlcatalog

The xmlcatalogelement is used to perform Entity and URI resolution.

param

Param is used to pass a parameter to the XSL stylesheet.

Parameters

Attribute Description Required

name Name of the XSL parameter Yes

expression Text value to be placed into the param.
Was originally intended to be an XSL expression. Yes

if The param will only be passed if this property is set. No

unless The param will not be passed if this property is set. No

outputproperty ('trax' processors only)

Used to specify how you wish the result tree to be outputas specified in the XSLT specifications.

Parameters

Attribute Description Required

name Name of the property Yes

value value of the property. Yes

factory ('trax' processors only)

Used to specify factory settings.

Parameters

Attribute Description Required

name fully qualified classname of the transformer factory to use. For example org.apache.xalan.processor.TransformerFactoryImpl or org.apache.xalan.xsltc.trax.TransformerFactoryImpl or net.sf.saxon.TransformerFactoryImpl... No. Defaults to the JAXP lookup mechanism.
Parameters specified as nested elements
attribute
Used to specify settings of the processor factory.The attribute names and values are entirely processor specificso you must be aware of the implementation to figure them out.Read the documentation of your processor.For example, in Xalan 2.x:
http://xml.apache.org/xalan/features/optimize (boolean)

http://xml.apache.org/xalan/features/incremental (boolean)

...

And in Saxon 7.x:
http://saxon.sf.net/feature/allow-external-functions (boolean)

http://saxon.sf.net/feature/timing (boolean)

http://saxon.sf.net/feature/traceListener (string)

http://saxon.sf.net/feature/treeModel (integer)

http://saxon.sf.net/feature/linenumbering (integer)

...

Parameters

Attribute Description Required

name Name of the attribute Yes

value value of the attribute. Yes

mapper

since Ant 1.6.2

You can define filename transformations by using a nested mapper element. The default mapperused by <xslt> removes the file extension from thesource file and adds the extension specified via the extensionattribute.

style

Since Ant 1.7

The nested style element can be used to specify your stylesheet in termsof Ant's resource types. Withthis element, the stylesheet should be specified as a nested resource orsingle-element collection. Alternatively, use the refid tospecify the resource or collection as a reference.

sysproperty

Use nested <sysproperty> elements to specifysystem properties required by the factory or transformation. Theseproperties will be made available to the VM during the execution ofthe class. The attributes for this element are the same asfor environment variables.

since Ant 1.8.0.

syspropertyset

You can specify a set of properties to be used as system propertieswith syspropertysets.

since Ant 1.8.0.

Examples

<xslt basedir="doc" destdir="build/doc"   extension=".html" style="style/apache.xsl"/>

Using an xmlcatalog

<xslt basedir="doc" destdir="build/doc"  extension=".html" style="style/apache.xsl">  <xmlcatalog refid="mycatalog"/></xslt><xslt basedir="doc" destdir="build/doc"   extension=".html" style="style/apache.xsl">   <xmlcatalog>   <dtd publicId="-//ArielPartners//DTD XML Article V1.0//EN" location="com/arielpartners/knowledgebase/dtd/article.dtd"/>   </xmlcatalog></xslt>

Using XSL parameters

<xslt basedir="doc" destdir="build/doc"  extension=".html" style="style/apache.xsl">  <param name="date" expression="07-01-2000"/></xslt>

Then if you declare a global parameter "date" with the top-level element <xsl:param name="date"/>, the variable $date will subsequently have the value 07-01-2000.

Using output properties

<xslt in="doc.xml" out="build/doc/output.xml"  style="style/apache.xsl">  <outputproperty name="method" value="xml"/>  <outputproperty name="standalone" value="yes"/>  <outputproperty name="encoding" value="iso8859_1"/>  <outputproperty name="indent" value="yes"/></xslt>

Using factory settings

<xslt in="doc.xml" out="build/doc/output.xml"  style="style/apache.xsl">  <factory name="org.apache.xalan.processor.TransformerFactoryImpl"> <attribute name="http://xml.apache.org/xalan/features/optimize" value="true"/>  </factory></xslt>

Using a mapper

<xslt basedir="in" destdir="out"  style="style/apache.xsl">  <mapper type="glob" from="*.xml.en" to="*.html.en"/></xslt>

Using a nested resource to define the stylesheet

<xslt in="data.xml" out="${out.dir}/out.xml"> <style> <url url="${printParams.xsl.url}"/> </style> <param name="set" expression="value"/></xslt>

Print the current processed file name

<project>  <xslt style="printFilename.xsl" destdir="out" basedir="in" extension=".txt" filenameparameter="filename" filedirparameter="filedir"  /></project><xsl:stylesheet  version="1.0"  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:param name="filename"></xsl:param> <xsl:param name="filedir">.</xsl:param><xsl:template match="/">  Current file is <xsl:value-of select="$filename"/> in directory <xsl:value-of select="$filedir"/>.</xsl:template></xsl:stylesheet>

Use an XInclude-aware version of Xerces while transforming

<xslt ...> <sysproperty key="org.apache.xerces.xni.parser.XMLParserConfiguration" value="org.apache.xerces.parsers.XIncludeParserConfiguration" /><xslt>

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