A workflow code generator for generating executable code for multi-channel and/or multi-modal applications. The code generator may include a parser for reading application input files and creating internal representations of declarative statements within the input files. The code generator may further include a model analyzer, which processes the internal model to detect errors, perform optimization, and prepare for outputting the result. The code generator uses a symbol or mapping table for storing references to resources that have been used by the input application. The code generator assigns code fragments to object patterns, resolves data object references by referring to mapping table, and traverses the objects and emits code assigned to the objects.