Actions
In an EBIF resource, programmatic (procedural) information takes the form of byte code, where each operation and its (optional) operands is referred to as an action. Actions are organized into sequences by means of one or more action tables where each entry points at (1) an encoded action and (2) the action table index of the next action to execute after the current action's execution is completed. An action sequence terminates when the next action table index is a special value (0xFFFF) or in the case of certain flow of control actions. Action sequences effectively represent one or more traditional code blocks with potential internal looping behavior.
Action sequences are executed as a result of firing certain predefined events, such as a page load event, a key press event, a click event, etc. As such, all programmatic execution takes place in the context of event handlers, whose execution is serialized by an ETV User Agent.
The following categories of actions are defined by EBIF:
- Flow of Control Actions
- Predicate Actions
- Variable Store Actions
- Arithmetic Actions
- Boolean Logic Actions
- Mathematic Actions
- String Actions
- Array Actions
- Application and Page Actions
- Widget Actions
- Table Actions
- Miscellaneous Actions
Read more about this topic: Enhanced TV Binary Interchange Format
Famous quotes containing the word actions:
“The course of my long life hath reached at last
In fragile bark o’er a tempestuous sea
The common harbor, where must rendered be
Account for all the actions of the past.”
—Henry Wadsworth Longfellow (1807–1882)
“In history an additional result is commonly produced by human actions beyond that which they aim at and obtain—that which they immediately recognize and desire. They gratify their own interest; but something further is thereby accomplished, latent in the actions in question, though not present to their consciousness, and not included in their design.”
—Georg Wilhelm Friedrich Hegel (1770–1831)
“The actions of each dancer were scrutinized with great care and any little mistake noted and remembered. The strain upon a dancer was consequently so great that when a fine dancer died soon after a feast it was said, “The peoples’ looks have killed him.””
—Merle Colby, U.S. public relief program (1935-1943)