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| + | ===== The <simpleCondition> Element ===== | ||
| + | ==== Definition and Usage ==== | ||
| + | |||
| + | The [[simplecondition|<simpleCondition>]] element defines a simple condition to trigger | ||
| + | actions in a causal relationship. | ||
| + | |||
| + | The [[simplecondition|<simpleCondition>]] element has a role //attribute//, whose value | ||
| + | shall be unique in the connector's role set. The role is a connector | ||
| + | interface point, which is associated to node interfaces by a link that | ||
| + | refers to the connector. | ||
| + | |||
| + | A [[simplecondition|<simpleCondition>]] also defines an event type (//eventType// | ||
| + | attribute) and to which transition in the event state machine it refers | ||
| + | (//transition// attribute). The //eventType// and | ||
| + | //transition// may be inferred by the role value, if reserved words are | ||
| + | used. Otherwise, the //eventType// and //transition// attributes | ||
| + | are required. | ||
| + | |||
| + | Reserved condition role values associated to event state machines: | ||
| + | |||
| + | ^ Role Value ^ Transition Value ^ Event Type ^ | ||
| + | | onBegin | starts | presentation | | ||
| + | | onEnd | stops | presentation | | ||
| + | | onAbort | aborts | presentation | | ||
| + | | onPause | pauses | presentation | | ||
| + | | onResume | resumes | presentation | | ||
| + | | onSelection | stops | selection | | ||
| + | | onBeginSelection | starts | selection | | ||
| + | | onEndSelection | stops | selection | | ||
| + | | onAbortSelection | paborts | selection | | ||
| + | | onPauseSelection | pauses | selection | | ||
| + | | onResumeSelection | resumes | selection | | ||
| + | | onBeginAttribution | starts | attribution | | ||
| + | | onEndAttribution | stops | attribution | | ||
| + | | onPauseAttribution | pauses | attribution | | ||
| + | | onResumeAttribution | resumes | attribution | | ||
| + | | onAbortAttribution | aborts | attribution | | ||
| + | |||
| + | If an //eventType// value is "selection", the role can also define to | ||
| + | which selection apparatus (for example, keyboard keys or remote control | ||
| + | keys) it refers, through its key attribute. If this attribute is not | ||
| + | specified, the selection via a pointer device (mouse, touch screen, | ||
| + | navigational keys) is assumed. | ||
| + | |||
| + | The role cardinality specifies the minimal (min attribute) and maximal (max | ||
| + | attribute) number of participants that may play the role (that is, the | ||
| + | number of binds) when the [[causalconnector|<causalConnector>]] is used to create a | ||
| + | [[link|<link>]]. If the max value is greater than one, a qualifier | ||
| + | attributeshould be specified informing the logical relationship among the | ||
| + | simple condition binds: "or" or "and". If the qualifier establishes the | ||
| + | "or" logical operator, the link action will be fired whenever any condition | ||
| + | occurs. If the qualifier establishes the "and" logical operator, the link | ||
| + | action will be fired after all the simple conditions occurrences. | ||
| + | |||
| + | A delay attribute may also be defined for a [[simplecondition|<simpleCondition>]], | ||
| + | specifying that the condition is true after a time delay from the time the | ||
| + | transition occurs. | ||
| + | |||
| + | ==== Syntax ==== | ||
| + | ^ Element ^ Attributes ^ Content ^ Parent ^ | ||
| + | | [[simplecondition|<simpleCondition>]] | __//role//__, //delay//, //eventType//, //key//, //transition//, //min//, //max//, //qualifier// | -- | [[causalconnector|<causalConnector>]] or [[compoundcondition|<compoundCondition>]] | | ||
| + | ==== Attributes ==== | ||
| + | |||
| + | ^ Name ^ Value ^ Description ^ | ||
| + | | //role// | String. | The //role// attribute defines a connector interface point, which is associated to node interfaces by a link that refers to the connector. The //role// value must be unique within the set of roles of the connector. | | ||
| + | | //delay// | <html><p></html>The //delay// attribute is be specified according with one of the following syntax:<html></p></html><html><ol></html><html><li class="level1"><div class="li"></html><"<nowiki>Hours:Minutes:Seconds.Fraction</nowiki>">, where "Hours" is an integer in the [0,23] interval, "Minutes" is an integer in the [0,59] interval, "Seconds" is an integer in the 0,59 interval, and "Fraction" is a positive integer,<html></div></li></html><html><li class="level1"><div class="li"></html>Seconds<"s">, where "Seconds" is a positive real number.<html></div></li></html><html></ol></html><html><p></html>The default value is "0s".<html></p></html> | The //delay// attribute defines a time delay, from the time the transition occurs, from which the [[simplecondition|<simpleCondition>]] must be considered satisfied. | | ||
| + | | //eventType// | "presentation", "selection", or "attribution". | The //eventType// attribute identifies the type of event for the action or condition. | | ||
| + | | //key// | At least the following values (case sensitive) must be accepted for the key attribute: "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "*", "#", "MENU", "INFO", "GUIDE", "CURSOR_DOWN", "CURSOR_LEFT", "CURSOR_RIGHT", "CURSOR_UP", "CHANNEL_DOWN", "CHANNEL_UP", "VOLUME_DOWN", "VOLUME_UP", "ENTER", "RED", "GREEN", "YELLOW", "BLUE", "BACK", "EXIT", "POWER", "REWIND", "STOP", "EJECT", "PLAY", "RECORD", and "PAUSE". | The //key// attribute identifies the selection key used for the selection. | | ||
| + | | //transition// | "starts", "stops", "aborts", "pauses", or "resumes". | The //transition// attribute specifies a transition in the event state-machine used to define the condition. | | ||
| + | | //min// | <html><p></html>Positive integer lesser than or equal to the //max// value.<html></p></html><html><p></html>The default value is 1.<html></p></html> | The //min// attribute defines the minimum number of participants that may play the role. | | ||
| + | | //max// | <html><p></html>Positive integer greater than or equal to the //min// value, or the "unbounded" value.<html></p></html><html><p></html>The default value is 1.<html></p></html> | The //max// attribute defines the maximum number of participants that may play the role. | | ||
| + | | //qualifier// | "and" or "or". | The //qualifier// attribute defines the logical relationship among the condition binds. | | ||
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