It depends if you mean edit the templates or edit the data that you use to populate it. You can create a rule template in any text editor you like and, AFAIK, it can have any extension you prefer. Convert it to an inputstream and use it in the code as is documented. Regarding the data source, you have multiple options to collect the data. Editing this data depends a bit on the type you are using. I typically convert xml objects to java objects and use (and, sometimes, abuse) them to fill the template and "generate" rules. Compile to drl is done using the code as documented. String drl = converter.compile( objs, templateStream ); You can do with the String whatever you like. use it to feed a knowledgebuilder directly, or write it to a file. Again. This depends on what you mean. If test the rule templates means: "check whether it generates a correct drl", than there are 2 things you can do. 1) Manually check that the rules are as you expect them to be. 2) Verify that the drl compiles in a knowledgebuilder. If "test" means, check whether my generated rules can construct a correct decision, then you wikk have to set up a service/a method/ a unit test in which you use the rules to create a knowledge base and which takes input data to generate a certain output. If you want, you can use guvnor to create test scenarios or implement a testing tool by your own. Regards, Frank mclovis wrote -- View this message in context: http://drools.46999.n3.nabble.com/Rule-Templates-tp2820139p4018956.html Sent from the Drools: User forum mailing list archive at Nabble.com.