20. A grammatical inference method for developing grammar performed by a computer system having data processing logic and computer readable storage media with one or more computer programs stored thereon, including using the computer system to process rules of the grammar, create additional rules representative of repeated phrases, and merge equivalent symbols of the grammar, wherein said rules define slots to represent data on which an interactive system executes operations and include symbols representing at least a phrase or term.
20. A grammatical inference method for developing grammar performed by a computer system having data processing logic and computer readable storage media with one or more computer programs stored thereon, including using the computer system to process rules of the grammar, create additional rules representative of repeated phrases, and merge equivalent symbols of the grammar, wherein said rules define slots to represent data on which an interactive system executes operations and include symbols representing at least a phrase or term. 31. A development tool for an interactive system having code stored on a computer readable media for executing the steps of the method as claimed in claim 20 .