[Tagging] Feature Proposal - RFC - sluice_gate

[Steve Bennett]

  On 5/01/2011 3:18 PM, John Smith wrote:
> Perhaps a more generic approach would work, eg
> waterway=flow_control
> flow_control=weir|sluice_gate|flood_gate|spillway_gate|....
Yeah something like that would be reasonable. What I'd like to see a lot 
more of is planning ahead: coming up with a scheme into which all future 
subtags can be slotted. It's very hard to change a tag once it's become 
popular. So perhaps:

waterway=dam (a wall with water on one side)
waterway=weir (a wall with water flowing over the top)
waterway=flow_control (an opening through which water sometimes flows). 
flow_control=sluice_gate|flood_gate|spillway_gate|lock_gate...

Then we get people who know this stuff to try and find exceptions that 
don't fit into the above scheme, and redesign it.

Steve