A method is provided that includes receiving a user input, the user input having been input in a user interface in one of multiple modalities. The method also includes accessing, in response to receiving the user input, a multi-modality content document including content information and presentation information, the presentation information supporting presentation of the content information in each of the multiple modalities. In addition, the method includes accessing, in response to receiving the user input, metadata for the user interface, the metadata indicating that the user interface provides a first modality and a second modality for interfacing with a user. First-modality instructions are generated based on the accessed multi-modality content document and the accessed metadata, the first-modality instructions providing instructions for presenting the content information on the user interface using the first modality. Second-modality instructions are generated based on the accessed multi-modality content document and the accessed metadata, the second-modality instructions providing instructions for presenting the content information on the user interface using the second modality.