Apparatus for generation of playable media from structured data, comprises a structured data reading unit for reading in of content of a first structure, a transformation unit for transforming said content into a second structure, said transformation comprising incorporating media play instructions, and a rendering unit for rendering content from the second structure using said media play instructions to generate playable media from the content.

Segmentation messages indicative of locations of upcoming events, such as the start and end of programs and program portions, and/or rights related to the programs and program portions, are used by cable systems and the like to store programs and program portions for later retrieval and transmission to customers on request. Storage, retrieval and management of programming is thereby facilitated. Methods and systems are disclosed.