"The approach taken in this draft is to use the flow map to express that multiple separate flows are to be synchronized in layout. A single flow is designated as primary, and contains synchronization regions mrked up to draw content from the other, secondary flow or flows; this secondary content will be rendered alongside the main flow at the synchronization points."


1. s/mrked/marked/
2. "Draw content from the other?" How does a region 'draw content' from a flow?
Is it the case that the first and second flows are connected or linked such that when the primary content is laid out, the connected content is laid out in the secondary flow 'side by side' with the first?