Translations:Help:Extension:Kartographer/18/en

By default, the data inside the  or   tag is shown only for that one tag, and will not be shown anywhere else. If  or   specify the   attribute, the data inside those tags will be placed into a named group, together with all the other data by the same group name. As a result, any tags with the same group name will show the same map data, and each tag may incrementally add data to the group.