This task checks that XML files are valid (or only well formed). Thetask uses the SAX2 parser implementation provided by JAXP by default(probably the one that is used by Apache Ant itself), but one can specify anySAX1/2 parser if needed.
<property> elements, containing string propertiesWarning : JAXP creates by default a non namespace aware parser.The "http://xml.org/sax/features/namespaces" feature is setby default to false by the JAXP implementation used by ant. To validatea document containing namespaces,set the namespaces feature to true explicitly by nesting the following element:
<attribute name="http://xml.org/sax/features/namespaces" value="true"/>
If you are using for instance a xsi:noNamespaceSchemaLocation attribute in your XML files,you will need this namespace support feature.If you are using a parser not generated by JAXP, by using the classname attribute of xmlvalidate, this warningmay not apply.
Parameters
Attribute | Description | Required |
file | the file(s) you want to check. (optionally can use an embedded fileset) | No |
lenient | if true, only check the XML document is well formed (ignored if the specified parser is a SAX1 parser) | No |
classname | the parser to use. | No |
classpathref | where to find the parser class. Optionally can use an embedded <classpath> element. | No |
failonerror | fails on a error if set to true (defaults to true). | No |
warn | log parser warn events. | No |
Nested Elements
dtd
<dtd> is used to specify different locations for DTD resolution.
Attribute | Description | Required |
publicId | Public ID of the DTD to resolve | Yes |
location | Location of the DTD to use, which can be a file, a resource, or a URL | Yes |
xmlcatalog
The <xmlcatalog>element is used to perform entity resolution.
attribute
The <attribute> element is used to set parser features.
Features usable with the xerces parser are defined here : Setting features
SAX features are defined here: http://xml.org/sax/features/
Attribute | Description | Required |
name | The name of the feature | Yes |
value | The boolean value of the feature | Yes |
property
The <property> element is used to set properties.These properties are defined here for the xerces XML parser implementation : XML Parser propertiesProperties can be used to set the schema used to validate the XML file.
Attribute | Description | Required |
name | The name of the feature | Yes |
value | The string value of the property | Yes |
Examples
<xmlvalidate file="toto.xml"/>
Validate toto.xml<xmlvalidate failonerror="no" lenient="yes" warn="yes" classname="org.apache.xerces.parsers.SAXParser"> classpath="lib/xerces.jar"> <fileset dir="src" includes="style/*.xsl"/></xmlvalidate>
Validate all .xsl files in src/style, but only warn if there is an error, rather thanhalt the build.<xmlvalidate file="struts-config.xml" warn="false"> <dtd publicId="-//Apache Software Foundation//DTD Struts Configuration 1.0//EN" location="struts-config_1_0.dtd"/></xmlvalidate>
Validate a struts configuration, using a local copy of the DTD. <xmlvalidate failonerror="no"> <fileset dir="${project.dir}" includes="**/*.xml"/> <xmlcatalog refid="mycatalog"/></xmlvalidate>
Scan all XML files in the project, using a predefined catalog to map URIs to local files.<xmlvalidate failonerror="no"> <fileset dir="${project.dir}" includes="**/*.xml"/> <xmlcatalog> <dtd publicId="-//ArielPartners//DTD XML Article V1.0//EN" location="com/arielpartners/knowledgebase/dtd/article.dtd"/> </xmlcatalog></xmlvalidate>
Scan all XML files in the project, using the catalog defined inline.<xmlvalidate failonerror="yes" lenient="no" warn="yes"> <fileset dir="xml" includes="**/*.xml"/> <attribute name="http://xml.org/sax/features/validation" value="true"/> <attribute name="http://apache.org/xml/features/validation/schema" value="true"/> <attribute name="http://xml.org/sax/features/namespaces" value="true"/></xmlvalidate>
Validate all .xml files in xml directory with the parser configured to perform XSD validation.Note: The parser must support the featurehttp://apache.org/xml/features/validation/schema
.The schemavalidate task is better for validatingW3C XML Schemas, as it extends this task with the right options automatically enabled,and makes it easy to add a list of schema files/URLs to act as sources.<pathconvert dirsep="/" property="xsd.file"><path> <pathelement location="xml/doc.xsd"/></path></pathconvert><xmlvalidate file="xml/endpiece-noSchema.xml" lenient="false" failonerror="true" warn="true"> <attribute name="http://apache.org/xml/features/validation/schema" value="true"/> <attribute name="http://xml.org/sax/features/namespaces" value="true"/> <property name="http://apache.org/xml/properties/schema/external-noNamespaceSchemaLocation" value="${xsd.file}"/></xmlvalidate>
Validate the file xml/endpiece-noSchema.xml against the schema xml/doc.xsd.