We support a custom Xml Configuration mechanism for configuring a Message Broker instance.
To provide tools and IDEs with an easy way of editing the XML as well as providing some handy documentation, we provide our own activemq.dtd file which describes all of the various configuration options available.
Even though we're using a DTD we still support custom extension of the XML via the Spring <bean> and <property> tags.
activemq.dtd 