Contact:website / website / url

Comparison of "contact:website / website / url" tagging and showing some pros and cons.

Notes and advantages

All two (three) taggings have equal rights. For additional information see following table for illustration.

Using non contact*:* scheme	Using contact*:* scheme
email=* / fax=* / phone=* / website=* / ( url=*) / ( mobile=*) / ( facebook=*) / ( vk=*)	contact:*=* ( contact:email=* / contact:fax=* / contact:phone=* / contact:website=* / contact:mobile=* / contact:facebook=* / contact:vk=*)
There is an advantage of usage the scheme without contact:*=*. When you don't use any editor presets, it is faster to use, because it's not necessary to type in so many letters for each key name parameter. For older values (e.g. website, phone) there is a higher amount of database distribution, this is reasonable because this was the initial tagging scheme, see #Taginfo & Tag History.	There is an advantage of contact:*=* contact=*, because mostly you will get consistent overview of tag arrangement, which will be a kind of a Namespace group block for contact=*. This is similar to other Namespaces, which are in a wide use for the OpenStreetMap database, e.g. Namespace group block of address information, see addr=*. When using this contact:*=* scheme and having these Namespace group blocks available it might be less error prone to get consistent data sets for existing poi objects in long run. This may also speed up different processing steps, e.g. while adding tags, while removing tags and, or while other maintenance work (like changing/updating key/values). For newer contact values (e.g. facebook, vk, mobile) there is a higher amount of database distribution, see #Taginfo and OSM Tag History.
addr:city=New Town addr:housenumber=1 addr:postcode=10103 addr:street=Station Street building=yes email=abc@defghi.com fax=+1 788 59324765 internet_access=yes mobile=+1 658 9355906 name=No block for contact tags without namespace operator=Grange Hotels phone=+1 776 37955 tourism=hotel website=http://www.no-group-hotel.com/ wheelchair=yes	addr:city=New Town addr:housenumber=1 addr:postcode=10103 addr:street=Station Street building=yes contact:email=jkl@mnopqr.com contact:fax=+1 788 59324765 contact:mobile=+1 658 9355906 contact:phone=+1 776 37955 contact:website=http://www.all-contacts-standing-against-each-other-hotel.com/ internet_access=yes name=Contact group poi operator=Grange House tourism=guest_house wheelchair=yes
Find examples via: https://overpass-turbo.eu/s/BLM (click "Run" button top left to show results)	Find examples via: https://overpass-turbo.eu/s/BLL (click "Run" button top left to show results)

Please decide by yourself, which tagging scheme you prefer. Interpreter software should know all of them.

Taginfo and OSM Tag history

To illustrate how often each tag is used, here are the Taginfo statistics and OSM Tag History graphs for these different tags:

Taginfo without contact	Taginfo contact scheme	OSM Tag History graph
website=*	contact:website=*	website=* vs contact:website=* vs url=*	url=*
		Taghistory.raifer.tech live Chart Graph of usage of website vs contact:website vs url from 2010 to 2019 Taginfo chronology website Taginfo chronology contact:website

phone=*	contact:phone=*	phone=* vs contact:phone=*
		Taghistory.raifer.tech live Chart Graph of usage of phone vs contact:phone from 2010 to 2019 Taginfo chronology phone Taginfo chronology contact:phone

email=*	contact:email=*	email=* vs contact:email=*
		Taghistory.raifer.tech live Chart Graph of usage of email vs contact:email from 2010 to 2019 Taginfo chronology email Taginfo chronology contact:email

fax=*	contact:fax=*	fax=* vs contact:fax=*
		Taghistory.raifer.tech live Chart Graph of usage of fax vs contact:fax from 2010 to 2019 Taginfo chronology fax Taginfo chronology contact:fax

mobile=*	contact:mobile=*	mobile=* vs contact:mobile=*
		Taghistory.raifer.tech live Chart Graph of usage of mobile vs contact:mobile from 2010 to 2019 Taginfo chronology mobile Taginfo chronology contact:mobile

facebook=*	contact:facebook=*	facebook=* vs contact:facebook=*
		Taghistory.raifer.tech live Chart Graph of usage of facebook vs contact:facebook from 2010 to 2019 Taginfo chronology facebook Taginfo chronology contact:facebook

vk=*	contact:vk=*	vk=* vs contact:vk=*
		Taghistory.raifer.tech live Chart Graph of usage of vk vs contact:vk from 2010 to 2019 Taginfo chronology vk Taginfo chronology contact:vk

instagram=*	contact:instagram=*	instagram=* vs contact:instagram=*
		Taghistory.raifer.tech live Chart Taginfo chronology instagram Taginfo chronology contact:instagram

See also

• Gym / Fitness centre - Comparison & overview the distribution of gym and fitness tags.
• Discussions/tagging/contact:phone or phone - 11-2019 Rejected attempt to merge phone=* and contact:phone=* to only phone=*.