<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><br><br><div dir="ltr">sent from a phone</div><div dir="ltr"><br><blockquote type="cite">On 3 Oct 2022, at 07:55, Mateusz Konieczny via Tagging <tagging@openstreetmap.org> wrote:<br><br></blockquote></div><blockquote type="cite"><div dir="ltr"><blockquote class="tutanota_quote" style="border-left: 1px solid #93A3B8; padding-left: 10px; margin-left: 5px;"><blockquote><div><br></div><div>- primary feature [1]<br></div><div>- main key [2]<br></div><div>- primary key [3]<br></div><div>- feature tag [4]<br></div><div><br></div><div>1) Are these synonyms (except for the key/tag distinction)?<br></div></blockquote><div><br></div><div><br></div><div>yes<br></div></blockquote><div dir="auto">what about cases where multiple features are tagged on one object?</div></div></blockquote><div><blockquote type="cite"><div dir="ltr"><div dir="auto">For example stream + road tagged on one line?</div></div></blockquote><br></div><div><br></div><div>2 primary features, identified by feature tags, represented by one OpenStreetMap element. Main key for stream is waterway, for road it is highway. In the osm2pgsql standard style, both are primary keys.</div><div><br></div><div>Cheers Martin</div></body></html>