Javadoc Documentation for sxsrte.jar

Where can I find the Javadoc documentation for the sxsrte.jar file?

I do not think that it exists in such a form.

I think the public methods are described in the documentation under the heading “X-Tension: Tamino Server Extensions”, especially “Developing Tamino Server Extensions”.

The APIs (Direct, Java, COM) were intended to be fairly similar in look and feel.