MediaLisp a system Design for Multimedia Augmented Transition Network in Lisp



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3.1.3. Sequencing:

3.1.3.1. Semantics of Sequencing:

To describe a sequence of media streams, we adopt the operator <<<. A sequence is a tuple of variable length surrounded by parenthesis with the first element is<<<. For example, to represent a sequential presentation of media streams x1, x2 and x3, we can use: (<<< x1 x2 x3). Sequencing allows nested structures, each element can be


The property set of Sequence contains "Name" and "Duration" with regarding system preserved properties.


3.1.3.2. Temporal Relationship Regarding to Sequencing:
The time duration is the summation of all time duration of contained streams within it. The temporal relationship among streams within a sequence can be obtained by simply applying "meet" relationship sequentially over all contained media streams. For example, given a sequence (<<< x1 x2 x3), then the time duration of the sequence is




+ +

Where



Duration of x1






Duration of x2






Duration of x3

The temporal relationship according to MATN:


x3


x2


x1












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