<p>Including complete parent objects would result in long and complex queries (while it can be supported). That's why no editor automatically calls <code>/ways</code> and <code>/relations</code> for every downloaded object. The proposed change simply notifies editors that there is something referencing the object, this way — because it is always included — editors cannot ignore it. "Simple" editors can even prohibit deleting an object if it is a member of anything not downloaded.</p>
<p>Including <code><parent></code> tags in planet dumps and map call responses is unncesessary, because all information is already there.</p>
<p>I see EWG meeting is today, I'll be there to discuss this proposal.</p>
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