<p>Per <a class="issue-link js-issue-link" data-error-text="Failed to load issue title" data-id="470803817" data-permission-text="Issue title is private" data-url="https://github.com/openstreetmap/iD/issues/6668" data-hovercard-type="issue" data-hovercard-url="/openstreetmap/iD/issues/6668/hovercard?comment_id=520489274&comment_type=issue_comment" href="https://github.com/openstreetmap/iD/issues/6668#issuecomment-520489274">openstreetmap/iD#6668 (comment)</a><br>
iD is using the <a href="https://wiki.openstreetmap.org/wiki/API_v0.6#Multi_fetch:_GET_.2Fapi.2F0.6.2F.5Bnodes.7Cways.7Crelations.5D.3F.23parameters" rel="nofollow">Multi Fetch GET</a> API call in a few situations to fetch ways and relations:</p>
<ul>
<li>downloading additional member ways for correct handling of multipolygons, routes, etc.</li>
<li>checking and dealing with error 409 conflicts at save time</li>
</ul>
<p>Unfortunately we need to still perform more calls after this to get all the related nodes (and this can be a lot of nodes).</p>
<p>It would be really great if we could have a version of this call that works like the <a href="https://wiki.openstreetmap.org/wiki/API_v0.6#Full:_GET_.2Fapi.2F0.6.2F.5Bway.7Crelation.5D.2F.23id.2Ffull" rel="nofollow"><code>/full</code> Single Fetch GET call</a> that returns all the related nodes in the response.</p>
<p>cc <a class="user-mention" data-hovercard-type="user" data-hovercard-url="/hovercards?user_id=5842757" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="https://github.com/mmd-osm">@mmd-osm</a></p>

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