2.8.74 TimeSequenceDataAtom

Office

Referenced by: ExtTimeNodeContainer

An atom record that specifies sequencing information for the child nodes of a time node. Each child can only be activated after its prior sibling has been activated.

Let the corresponding time node be specified by the ExtTimeNodeContainer record (section 2.8.15) that contains this TimeSequenceDataAtom record.

Let the corresponding next time condition list be specified by the rgBeginTimeCondition field in corresponding time node, which specifies the time conditions to activate the next child time node.


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rh

...

concurrency

nextAction

previousAction

reserved1

A

B

C

reserved2

rh (8 bytes): A RecordHeader structure (section 2.3.1) that specifies the header for this record. Sub-fields are further specified in the following table.

Field

Meaning

rh.recVer

MUST be 0x0.

rh.recInstance

MUST be 0x000.

rh.recType

MUST be an RT_TimeSequenceData.

rh.recLen

MUST be 0x00000014.

 

concurrency (4 bytes): An unsigned integer that specifies the concurrency behavior of the child nodes of the corresponding time node. It MUST be ignored if fConcurrencyPropertyUsed is FALSE and a value of 0x00000000 MUST be used instead. It MUST be a value from the following table.

Value

Meaning

0x00000000

No concurrency: the next child is activated only after the current child ends and conditions in the corresponding next time condition list are met.

0x00000001

Concurrency enabled: the next child can be activated after the current child is activated and conditions in the corresponding next time condition list are met.

nextAction (4 bytes): An unsigned integer that specifies actions when traversing forward in the sequence of child nodes of the corresponding time node. It MUST be ignored if fNextActionPropertyUsed is FALSE and a value of 0x00000000 MUST be used instead. It MUST be a value from the following table.

Value

Meaning

0x00000000

Take no action.

0x00000001

Traverse forward the current child node along the timeline to a natural end time.

The natural end time of a child node is the time when the child node will end without interventions. If the end time is infinite, the child node will never stop. The natural end time of the child node is specified as the latest non-infinite end time of its child nodes.

previousAction (4 bytes): An unsigned integer that specifies actions when traversing backward in the sequence of child nodes of the corresponding time node. It MUST be ignored if fPreviousActionPropertyUsed is FALSE and a value of 0x0000000 MUST be used instead. It MUST be a value from the following table.

Value

Meaning

0x00000000

Take no action.

0x00000001

Continue backwards in the sequence until reaching a child that starts only on the next time condition as specified in the corresponding next time condition list.

reserved1 (4 bytes): MUST be zero, and MUST be ignored.

A - fConcurrencyPropertyUsed (1 bit): A bit that specifies whether concurrency was explicitly set by a user interface action.

B - fNextActionPropertyUsed (1 bit): A bit that specifies whether nextAction was explicitly set by a user interface action.

C - fPreviousActionPropertyUsed (1 bit): A bit that specifies whether previousAction was explicitly set by a user interface action.

reserved2 (29 bits): MUST be zero, and MUST be ignored.

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