Abstract: Extensible, multi-presentation content is created in human/machine readable form, where each data object may contain numerous data elements that comprise alternate representations of a single piece of information, such as audio, text transcription of the audio, short-form summary of the text, and metadata concerning the story. Advantageously, each data element is presentation-independent, meaning that it does not require a particular type of presentation, such as HTML, WML, etc. Each content instance thus provides raw data, leaving the end-user free to access the data as desired. Specifications such as data type definitions (DTDS) may be used to prescribe that each story include the constituent data elements, e.g., text, audio, short-form text, metadata, etc. The DTDs define a dialect of extensible Markup Language (XML). Further, different DTDs prescribe the format of each data element. A developer may also define further DTDs defining additional data elements, sub-elements, sub-sub-elements, and the like.

Abstract: Responsive to an incoming telephone call, a session server consults pre-stored caller preferences to generate a source file of caller-specific audio content, then conducts an interactive playback session audibly presenting the content to the caller. Each call's source file may include an internally stored history record documenting events that occur during playback, such as caller utterances, identity of audio content presented, voice prompts presented to the caller, errors, and time stamps of various playback events. In response to certain caller utterances or completion of the source file's presentation, the session server may reference the history record for guidance in creating an appropriate follow-up source file containing appropriate supplementary audio content. Use may also be made of history records for purposes such as increasing the functionality of interactive user playback, providing billing records, aiding debugging, and preserving data that is useful for marketing purposes.

Abstract: An audio information delivery system collects electronic data via Internet or other conveyance, and responsive to customer inquiries, selectively retrieves data from local stores in areas of interest to the inquiring customers, formats the data, and transmits the data in audio form to the customers via their telephones. Initially, an information delivery agency makes advance arrangements with remotely located content providers to repeatedly obtain information of prescribed character. Agency computers continually gather digitally stored audio and text information from the predefined content providers and assemble the gathered information into a universal database. Separately, the agency enrolls a number of individual customers, which includes obtaining each customer's preferences regarding information content and playback order.