I want to propose a new tag for the craft electrician.
electrician:speciality (like the healthcare:speciality)
I run over this while adding a new company.
installation = installation of electrial systems
safety = alarm systems video surveillance
lightning = light up your home
photovoltaics = Installation of photovoltaics systems
smart_home = Installation of smart home systems like KNX, digitalSTROM and others
satellite = installation of satellite systems
...
speciality=installation;safety;lightning;photovoltaics;smart_home;satellite does the job.
because we have craft=electrician, we know it’s not about healthcare.
Most electricians will do all of those things except solar (but with some doing solar as well), while solar electricians are able to also do all the rest as well, so I can’t see the point of listing them all?
That’s too broad, and not a universal attribute. It’s convenient to use the same eg material= when the features have interchangable =wood , =metal , =plastic etc. There’s no significant benefit in speciality= when they are all different.
There’s 7 usual electrician | Keys | OpenStreetMap Taginfo
I’d go with craft = electrician + electrician = XX;XY.
That perfectly aligns with other crafts where this scheme is already used hundreds of times. craft = electronics_repair + electronics_repair = XX;XY
or craft = carpenter + carpenter = XX;XY
It also disentangles issues if a company offers two crafts.
That said, it’s good to have documented values for this, but there’s no need to have ‘speciality’ in the key - this is about as useful as adding :type as is done in too many old-school tags.
installation is too generic a term and does not convey anything useful
the key word for alarm and surveillance systems should be security rather than safety
lightning is hopefully not about lighting up your home but for the opposite: protecting your home from being lit up. (Blitzschutz in German)
The term you are looking for is lighting
satellite is not clear, is it about reception or transmission? Or controlling satellites?
Electrical installation of all kind including alarm equiment, lighting, smart home equipment, sattellite dishes and the like are the core activities of every electrician and not “specialities”. Would we tag baking bread and bread rolls as a speciality for a shop=bakery?
The only exception is the installation of PV systems which is normally done by specialized craftsmen. We have craft=photovoltaic for these. In cases where a general electrician additionally offers PV installations this could be tagged additionally.
A “speciality” could be something like high voltage installations which requires additional qualification imo. Or installation of radio stations, radar systems, laser guns and the like. But most of these activities are rather carried out by large specialized companies instead of the electrician workshop around the corner.
First thought here is verifiability. In my experience electricians do not have verifiable premises which the public visit. You contact them by phone, or social media and they arrive in a van.
Some do. But write what they prefer to do, not all what they can. So you see one speciality here, on their website you’ll see more. And if you need something slightly outside their main work, they’ll probably do too.
To be fair, there can be specialization in the “staples”, at least in other countries. There are bakeries specializing in bread loaves, bagels, or croissants.
On the other hand, it might be possible for a few electricians to not do something? Then the negative electrician:*=no may be used. However, services are more complicated than products. This could fall into the aversion against listing all the details in the menu alongside prices.
Adding website, phone, email and similar information is probably the best we can do here (with some exceptions were they are specialized, like for photovoltaics).