| 摘要 |
Various embodiments of the present invention are directed to a distributed user-profile data structure that describes a portable-electronic-content-rendering-device user, the user's various electronic devices, the user's downloaded content, and other information that is exchanged, in initial steps of various information-exchange and transaction protocols. The distributed user-profile data structures that represent embodiments of the present invention may include a header, general user information, device information, credit card information, account information, virtual-store information, and information about one or more different types of downloadable content. Various fundamental unary and binary operations are defined on distributed user-profile data structures. The distributed user-profile data structures that represent embodiments of the present invention find use in many different dynamic, often geographically independent, electronic-device environments, including peer- to-peer interconnection environments, retailing environments, and Internet-based commerce environments.
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