It is largely compatible with most QR-readers for smartphones. It is an easy way to share a contact with the most used fields. Usually, devices can recognize it and treat it like a contact ready to import.
The following QR Code image is an example containing the text: MECARD:N:Doe,John;TEL:13035551212;EMAIL:firstname.lastname@example.org;;
Its main advantage is the simplicity: It is very intuitive.
It is based in UTF-8 (which is ASCII compatible), the fields are separated with one semicolon (";"), the tags are very readable, they are separated with a colon (":") and --maybe the most important reason-- compared with vCard it needs very few chars which is important for the size of a QR Code.
Compared to vCard, MeCard format only stores one single contact, a few labels, and a few data pieces to be set in a typical phonebook.
MeCard format starts with the tag "MECARD:" and it finishes with two semicolons (";;")
The supported tags include:
|Tag||i-mode compatible bar code recognition function||Description||Example|
||3.0||The physical delivery address. The fields divided by commas (,) denote PO box, room number, house number, city, prefecture, zip code and country, in order.|
||3.0||8 digits for date of birth: year (4 digits), month (2 digits) and day (2 digits), in order.|
|1.0||The address for electronic mail communication.|
||1.0||A structured representation of the name of the person. When a field is divided by a comma (,), the first half is treated as the last name and the second half is treated as the first name.|
||3.0||Familiar name for the object represented by this MeCard.|
||1.0||Specifies supplemental information to be set as memo in the phonebook.|
||1.0||Designates a text string to be set as the kana name in the phonebook. When a field is divided by a comma (,), the first half is treated as the last name and the second half is treated as the first name.|
||1.0||The canonical number string for a telephone number for telephony communication.|
||2.0||The canonical string for a videophone number communication.|
||3.0||A URL pointing to a website that represents the person in some way.|