Abstract: A user interface for a device comprises a plurality of layers. The content for the user interface is associated with one of the plurality of layers.

Abstract: A virtual file system is described that enables both real data resources, such as a content file, and virtual data resources, such as a field within a database or a state determined by a mark-up language element, to be accessed through a single root.

Abstract: A user interface for a device comprises a plurality of layers. The content for the user interface is associated with one of the plurality of layers.

Abstract: A user interface for a device comprises a plurality of layers. The content for the user interface is associated with one of the plurality of layers.

Abstract: A method of generating displayable content is provided. The method includes obtaining a display package having a plurality of display elements defining a plurality of display frames. The method further includes rendering at least one selected group of the plurality of display elements. Each selected group is based on indicator information in the display package and comprises less than all of the plurality of display elements. Further included is saving a copy of each rendered selected group in a second display buffer. The method further includes rendering at least one display frame within the plurality of display frames such that at least a portion of the at least one rendered display frame comprises the saved copy of at least one rendered selected group. Further included is saving the at least one rendered display frame in a first display buffer that is different from the second display buffer.

Abstract: Described are various methods and apparatuses for automatic updating of variables in a data language. A dynamic variable is updated by parsing an instruction written in the data language containing the dynamic variable, creating the dynamic variable in memory, assigning a value for the dynamic variable, and updating the dynamic variable value without parsing the instruction written in the data language containing the dynamic variable. The dynamic variable may also be updated by creating an object associated with the dynamic value, wherein the object determines the value of the dynamic variable. Further, an observing a function value may be associated with the dynamic variable and then a notification is given to the object when the function value has changed.

Abstract: Described are various methods and apparatuses for fine grained control of z-order elements in a presentation. A structure is defined containing user interface elements and an order is defined for rendering such user interface elements. It is desired that some elements may need to be rendered out of the defined order, therefore a raise user interface element is defined allowing for one or more user interface elements to be defined to be rendered out of the normally defined order. User interface elements may something to be presented on a display and may also include program code for defining behaviors.

Abstract: There is provided a user interface which is defined by a plurality of actors and the attributes) that are associated with the actors. A renderer is used to render the user interface in accordance with the attributes of the actors. Changes in actor attributes, for example in response to a keypress, cause the user interface to be updated.