[mkgmap-dev] Making site relations visible

Can someone give me information about rendering relations. I have tagged some relations of type=site but they don't show up in my maps. One such site is a named group of three apartment buildings. The relation itself has a name tag and each building is merely tagged as building=yes. I've had trouble with relations before and although they are the correct way to tag certain groups of objects the fact that they seem not to render properly exasperates me. Unfortunately, the relations style file that I am using deals only with routes. This is not really a development question but you're the experts. If you think this question should be asked elsewhere, please make a suggestion. Cheers, Dave