[web-animations] the definition of animation node is weak

Hello, everyone.

Section '2. Web Animations model overview' define the model
consisting of two parts: Timing model and Animation model.
Timing model is hierarchy of timing nodes:
     * The global clock
     * Timelines
     * Players
     * Animation nodes

For each timing node the specification gives definition and its role in
the hierarchy:

> The global clock is a source of monotonically increasing time values  
> unaffected by adjustments to the system clock.
https://w3c.github.io/web-animations/#the-global-clock

> A timeline provides a source of time values for the purpose of  
> synchronization.
https://w3c.github.io/web-animations/#timelines

> The children of a timeline are called players. A player takes an  
> animation nodewhich is a static description of some timed behavior and 
> binds it to a timeline so that it runs. A player also allows run-time 
> control of the connection between the animation node andits timeline by  
> providing pausing, seeking, and speed control.
https://w3c.github.io/web-animations/#players

> An animation node is an abstract term referring to an item in the timing  
> hierarchy.
https://w3c.github.io/web-animations/#animation-nodes

As you can see, the definition of animation node does not define any  
additional
properties, that can be used to distinguish animation nodes from other  
timing nodes.
Furthermore, the role (or function) of animation node is also not defined.

Could you provide some useful definition for animation nodes?
Something like: animation node is a placeholder
for animation model items.

Thanks,
Aleksei.


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Received on Thursday, 19 February 2015 08:32:06 UTC