Jing contains a built-in implementation of the W3C XML Schema Part 2 Recommendation. Jing follows the Guidelines for using W3C XML Schema Datatypes with RELAX NG.
The implementation of the pattern facet (and of some
of the more complicated datatypes) requires an implementation of
regular expressions as defined in XML Schema Part 2.
Jing provides implementations based on:
java.util.regex package (included
in Java in versions 1.4 and later)Jing will automatically use the first of the above implementations for which the necessary classes are available on your CLASSPATH.
You can interface a different implementation of XML Schema regular
expressions by implementing the interface
com.thaiopensource.datatype.xsd.RegexEngine. Jing finds
an implementation of this interface using the service provider
technique: a JAR file containing an implementation of this interface
must contain a file
META-INF/services/com.thaiopensource.datatype.xsd.RegexEngine
that contains the name of class that implements the interface. Jing
will automatically find and use the implementation if the JAR file is
added to the CLASSPATH.