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Extensible media commerce language (XMCL) is a rule for electronic multimedia language use. The Association of American Publishers defines XMCL as a rights specification language. Business rules are defined within XMCL for consumer licensure as it pertains to digital media.
The primary purpose of XMCL is to enable digital media interchangeability within business systems or networks. Additionally, XMCL provides a type of model or standard to follow during the digital media exchange process. Its structure is based on XML.
XMCL is a language model outlining six steps for digital media rights management - create, package, publish, distribute, license and consume. Content negotiations are fine-tuned through the use of XMCL, and the steps that are used depend on the service specifications of a given business. One end contains the publishing and licensing side, while the other end is composed of the content packaging system and rule enforcement concepts. Rights management systems have incorporated all parts of XMCL. Furthermore, XMCL supports a variety of business models such as digital ownership, videos on demand, pay-per-view videos, video subscriptions and video rentals. When a customer makes a purchase, the business system identifies the purchase and produces an XMCL document. Then, a trusted system takes the XMCL document, acts upon it and enforces it.