Abstract: A method for identifying the contents of a compact disc manipulating a received table of contents (TOC) identifier associated with the compact disc. The method parses portions of the TOC comprising a series of numbers corresponding to track offsets for each track of the compact disc. The method further determines the first number from the series of numbers, subtracts the first number from each number in the series of numbers to form an altered series of numbers, and concatenates the altered series of numbers to form an altered string that comprises the altered TOC identifier. The altered TOC identifier may then be compared to a plurality of canonical TOC identifiers to identify the contents of the compact disc. Another method generates a generic TOC identifier for a plurality of compact discs known to contain the same data.

Abstract: Methods, computer-readable media, and data structures for building an authoritative database of digital audio identifier elements from digital media accessed by clients. The digital media including one or more media items, such as tracks on a CD. The methods, computer-readable media, and data structures further identifying metadata associated with a media item accessed by a client utilizing the authoritative database of digital audio identifier elements.

Abstract: Methods, computer-readable media, and data structures for building an authoritative database of digital audio identifier elements from digital media accessed by clients. The digital media including one or more media items, such as tracks on a CD. The methods, computer-readable media, and data structures further identifying metadata associated with a media item accessed by a client utilizing the authoritative database of digital audio identifier elements.

Abstract: The mechanisms described herein are directed at methods for locating web services available for client applications. The methods allow web services to re-locate without impacting the code of the client applications that access the web services. The client application sends a message that includes an identifier to a referral service. The referral service re-directs the message to a locater service based on the identifier. The locater service determines a set of locations associated with web services based on attributes associated with the client application. The attributes may include a client type, a client version, or a locale. The set of locations are transmitted to the client application for use in accessing the web services. Upon failing to access one of the web services identified within the set, the client application re-sends the message to obtain an updated set of locations.