The documentation you're referring to is for JBossWS 3.x.
For JBossWS 4.x / JBoss AS 7.x, please refer to
In particular, given this topic was not fully covered yet in the doc, I've just added the following:
https://docs.jboss.org/author/display/JBWS/Advanced+User+Guide#AdvancedUserGuide-Logging