[Tagging] fire extinguisher class

[Craig Wallace]

On 2015-04-23 18:01, Bryce Nesbitt wrote:
> On Thu, Apr 23, 2015 at 5:31 AM, <phil at trigpoint.me.uk
> <mailto:phil at trigpoint.me.uk>> wrote:
>
>     That makes much more sense,  and as you say, maps the physical
>     characteristics.
>     The letters seem like specialist knowledge that few people will be
>     aware of.
>     Phil (trigpoint )
>
>
> But the letter codes are exactly what's printed in huge letters right on
> the extinguisher.
> That makes them easily verifiable, and instantly localized since you'd
> tag what's on the ground in your country.
>
>     Class A

In the UK, the class is not printed huge letters. They main thing they 
are labelled with is the contents of the extinguisher, with a coloured 
stripe. ie red for water, blue for powder, black for CO2.

Some fire extinguishers also give more detailed specifications for the 
class etc. But this is usually not very obvious, you would have to look 
closely to spot it.
Note a fire extinguisher can be suitable for several classes of fire, 
and it may give a rating for each. eg the specification might say: 8A 
55B 75F

I think it is worth tagging both the materials in the extinguisher, and 
the class/rating where it is known. And probably worth using different 
tags for the class in each country.

eg something like this:
fire_extinguisher:material=water
fire_extinguisher:class:uk=8A 55B 75F