4.3. Advanced BIFS Features
In this section, some advanced BIFS features are presented.[9] The first feature, scripting, is introduced through an example in which the Script node is used to achieve complex interaction and create a panorama. Next, data encapsulation and model reuse with PROTO are presented. Finally, a way to deal with the unpredictability of text layout by using the Layout and Form nodes is explained.
[9] The subjective difference between basic feature and advanced feature is that all users of BIFS are expected to have to use basic features, whereas only a subset of users will need advanced features. This should not be confused with the somewhat arbitrary usage of the term “advanced” in the standard.
4.3.1. Scripting
This example ...
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