<div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">2016-09-19 5:50 GMT+02:00 patrick keshishian <span dir="ltr"><<a target="_blank" href="mailto:pkeshish@gmail.com">pkeshish@gmail.com</a>></span>:<br><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><div class="gmail-a3s gmail-aXjCH gmail-m1574092a3cb929a9" id="gmail-:1ls">Question: Is there a general rule used when processing role=""?<br></div></blockquote><div><br><br></div><div>it depends on the type of relation<br><br></div><div> </div><blockquote style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex" class="gmail_quote"><div class="gmail-a3s gmail-aXjCH gmail-m1574092a3cb929a9" id="gmail-:1ls">
OSM wiki for Relation [3] indicates that roles are optional. </div></blockquote><div><br><br></div><div>yes, they are generally optional, save for certain relation types. A relation is a very generic concept, and can be used for expressing a lot of different things, For multipoligon relations, a role should be set (but many tools, e.g. osm2pgsql) ignore them AFAIK.<br><a href="http://wiki.openstreetmap.org/wiki/Relation:multipolygon#Members">http://wiki.openstreetmap.org/wiki/Relation:multipolygon#Members</a><br></div><div><br></div><div>cheers,<br></div><div>Martin<br></div></div><br></div></div>