It seems in page anchor links are broken. For example on the CSP Web Gateway Management Page: 

http://docs.intersystems.com/beta/csp/docbook/DocBook.UI.FramePage.cls?K...

In the secion "Event Log Level" there is a link to "Event Logging Parameters" (which would go to: http://docs.intersystems.com/beta/csp/docbook/DocBook.UI.FramePage.cls?K...

 

However, that only takes you to the beginning of the page and not to the actual section (in the same page). 

I don't really think that that's surprising at all.  A REST handler class manages everything coming in for a certain endpoint like /some/url/

Note the trailing '/'. Anything added to that specifies a REST path, and will be handled according to your definitions in your urlmap. 

A Websocket endpoint is a single point of connection and not a starting point for a whole set of target urls. So it makes total sense to separate those. 

I know you can actually write a REST dispatcher which allows to render csp/zen pages through a REST dispatching class, but that is a very hack-ish solution. Unlike REST handling, websockets need to be treated special in the CSP gateway, so I'd be surprised if you could do a similar hack. Of course you can always mod_rewrite on the apache side to do whatever you want....