|A way to group of features, for example buildings or amenities, which belong together.|
|Tools for this tag|
A way to group of features, for example buildings or amenities, which belong together. Examples: the various dispersed facilities associated with a school, college, university, airport or military bases.
It may contain number of buildings, one or more boundaries, and maybe other amenities such as swimming pools or tennis courts.
It is not necessary or appropriate to use a relation when all the elements are contained within the boundary of the site. In this simple case simply tag the perimeter with all the appropriate tag (users of the information can simply perform an 'is-in-polygon' test to determine which elements belong to the site).