Glimmr Canvas-Based Drawing
version 2/101030 by Erik Temple
Chapter - New kinds of value
A g-activity is a kind of value. The g-activities are g-active and g-inactive.
The specification of g-activity is "The g-activity is a simple binary value that is used to define whether a property of a g-element is active or inactive. A g-element can have an active display status, or an active graphlink status."