Dynamic content in the r-model
Abstract content may be statically defined or it may be computed.
It is useful to distinguish separate categories of computed content
from one another. One such categorization distinguishes:
- Computed content: executor of an algorithm that produces a subsequently
static display.
- Dynamic content: dynamic execution of an algorithm: start on node entry,
terminate on node exit.
- Filtered computation: continuously-executing filter.
Of course a changing content may influence the concrete content, as it
may require reformatting the content to fit within the display region.