[Tagging] Feature Proposal - RFC - sluice_gate

[Steve Bennett]

  On 4/01/2011 7:20 AM, Paul Norman wrote:
> They both have elements of flow control, but function in quite different
> ways and look very different. A weir is used to raise the water level or
> control flow, with water flowing over the top. A sluice gate is essentially
> a valve for small waterways.

In this case, why not something like:

waterway=weir
weir=sluice_gate

I'm wary of the endless drive to create more high-level tags. It 
increases the burden on reusers of the data.

Steve