It seems that some effort has been made to implement some automatic Knowledge build support for Eclipse. (Right now there is a couple of open questions on the users' list.)
One issue seems to be related to the "expander <path>" statement intended for use for this automatic build. But when you use the KnowledgeBuilder in the regular way, adding DSLs and DSLRs, the expander statement is disregarded. I don't think this is good.
What is the master plan for having automatic build for DRL, DSL, DSLR, etc., in Eclipse? Does this make sense at all, given all the options you can add to the Builder?
Cheers
Wolfgang