Abstract: A channel-selection filter. The channel-selection filter helps a user navigate to a desired channel. In particular, the channel-selection filter presents a filtered channel list to the user when the user issues one or more channel-filtering commands. The filtered channel list narrows a list of all available channels to those channels that correspond to the channel-filtering commands issued by the user. When presented with a filtered channel list, the user can select a channel from the filtered channel list. The user can also issue additional channel-filtering commands to further narrow the list of channels presented in the filtered channel list.

Abstract: A channel-selection filter. The channel-selection filter helps a user navigate to a desired channel. In particular, the channel-selection filter presents a filtered channel list to the user when the user issues one or more channel-filtering commands. The filtered channel list narrows a list of all available channels to those channels that correspond to the channel-filtering commands issued by the user. When presented with a filtered channel list, the user can select a channel from the filtered channel list. The user can also issue additional channel-filtering commands to further narrow the list of channels presented in the filtered channel list.

Abstract: Identifying a location of a metadata package to an application program. The system maintains a plurality of metadata packages and locations associated therewith. The plurality of metadata packages is filtered based on attributes in a request received from the application program to identify at least one metadata package. The location associated with the identified metadata package is sent to the application program.

Abstract: Identifying a location and download schedule of web services. Responsive to a request from the application program, the system generates a list of the web services available to an application program along with locations and schedule times associated with the web services. The schedule times implement load management of the web services. The application program accesses the web services at the identified locations at the determined schedule times.

Abstract: An extensible mechanism for storage and interchange of objects is described herein. According to first aspect of the disclosure, objects having respective class definitions are received. The objects are represented in an interchange format by mapping the class definitions of the objects to corresponding fields defined within the interchange format. According to a second aspect of the disclosure, the objects are loaded into a persistent store by mapping the class definitions of the objects to corresponding fields of the store. According to at least a third aspect of the disclosure, a data structure for a unique identifier element is described, along with processes using the unique identifier element to determine whether to update an existing object in the store, or to create a new object in the store.

Abstract: A transport stream is encrypted in such a manner that the stream may be processed without requiring encrypted portions of the stream to be decrypted. Thus, an analysis is performed on the stream to determine at least one portion of the stream that is to pass unencrypted, thus enabling the stream to be processed in a manner that bypasses encrypted portions of the stream.