Abstract: A content author provides content to be displayed, including some content elements for which display is conditional on the state of the machine in which the content will be viewed. The conditional statements controlling the display of these content elements, in one embodiment refer to states provided by a state monitor. The state may refer to the state of any aspect of the viewing environment, including hardware, software, firmware, user preferences, software operating modes, and any other detectable state. The resulting content is optionally combined with other similar content via a structural transform. This content is transformed with a presentation transform. One of the transforms checks the states and resolves the conditional statements included by the content author. The result of the transforms is presentation data. A display of this presentation data includes the content which, according to the conditional statements and the state of the viewing environment is appropriate for display.

Abstract: Content including links to behaviors (code which can be executed and return supplemental content for insertion, or can modify existing content) is stored, and at run-time, the links to behaviors are followed and the supplemental content or the modifications to existing comment are used to create a final version of content which will be presented to the user. Security enhancements including a security check ensure that only behaviors which are secure will be run. Default content may be provided, which may be inserted if the security check is not passed, or if the content returned from the behavior is unusable for some reason.