# The <xslt> element

The `xslt` element of the configuration file contains properties specific to XSLT. Remember that these are defaults, they can always be overridden for specific queries or transformations. An attribute whose value is set to a zero-length string is ignored, the effect is the same as omitting the attribute.

Attribute | Values | Effect
messageReceiver | Java class that implements `net.sf.saxon.event.Receiver` | Destination of `xsl:message` output
outputUriResolver | Java class that implements the Saxon OutputURIResolver interface | Handles documents written using `xsl:result-document`
recoveryPolicy | recoverWithWarnings|recoverSilently|fail | Indicates how XSLT recoverable errors are handled (for example, ambiguous template rules)
schemaAware | true|false | Indicates whether stylesheet should be compiled to be able to handle schema-typed input, even if they contain no `xsl:import-schema` declaration
staticErrorListener | Java class that implements the JAXP ErrorListener interface | Receives reports of compile-time errors in a stylesheet
staticUriResolver | Java class that implements the JAXP URIResolver interface | User-defined class for dereferencing URIs on `xsl:include` or `xsl:import`
styleParser | Java class that implements XMLReader | XML parser used for stylesheet and schema modules
version | 0.0, 2.0, or 2.1 | XSLT language version to be supported by the processor. The value 0.0 indicates that the version is taken from the `xsl:stylesheet` element.
versionWarning | true|false | False suppresses the warning produced when the XSLT processor version is not the same as the version in the xsl:stylesheet element.

The `xslt` element may contain one or more `extensionElement` children defining namespaces used for extension instructions. The `extensionElement` element has the following attributes:

Attribute | Values | Effect
namespace | A namespace URI | The namespace URI of the extension instructions
factory | The name of Java class that implements the Saxon interface `ExtensionElementFactory` | Links to the implementation of the various extension instructions in the specified namespace.

Next