You can still selectively update any tile by clicking on it, greatly reducing the overall data flow.

This yields sets of available expressions at the end of each basic block, known as the outset in data flow analysis terms.

Data flow direction may be selected on a line-by-line basis with intermixed input and output lines within the same port.

Interval graphs are integral to some algorithms used in compilers, specifically data flow analyses.

This bidirectional data flow can be abstracted with an ordinary serial line.