We are using RDM2 for prompt and collect, to get input from the user we have all prompt and collect parameters are defined in a property file and this property file has been referenced to get user input.

I would like to use builtin grammar for DTMF and voice inout collection instead of pointing to an external grammar. Kindly let me know how to refer/configure the builtin grammar in the property file. Below are the parameters used for grammar reference in the property file.

#DTMF Grammars
dtmfGrammar=Get8Digit_DTMF.grxml
#Voice Grammars
voiceGrammar=Get8Digit.grxml*DontKnowIt.grxml

OD allows you to create a build-in grammar in a few clicks using the UI. Maybe you should plan out what grammars you need and use the OD UI to create them?