To build a jar file, change into SCXML's root directory and run "maven jar". The result will be in the "target" subdirectory.
To build the Javadocs, run "maven javadoc". The result will be in "target/docs/apidocs".
To build the full website, run "maven site". The result will be in "target/docs".
To build the site, you need Maven 1.0.2 and version 1.9.2 of the maven-xdoc-plugin installed.