<div dir="auto">I would set them to null. In general I wouldn't change the dataset fields schema along the processing steps, except in case of algorithms dedicated to this.<div dir="auto">The same happens with Dissolve.</div><div dir="auto"><br></div><div dir="auto">giovanni</div></div><div class="gmail_extra"><br><div class="gmail_quote">Il 28 giu 2017 09:53, "Nyall Dawson" <<a href="mailto:nyall.dawson@gmail.com" target="_blank">nyall.dawson@gmail.com</a>> ha scritto:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">On 28 June 2017 at 14:42, Paolo Cavallini <<a href="mailto:cavallini@faunalia.it">cavallini@faunalia.it</a>> wrote:<br>
<br>
> If we use the boolean as you suggested, I think the default should<br>
> probably be all features.<br>
<br>
That's fine by me.<br>
<br>
Incidentally - how should we handle attributes here (and other similar<br>
algorithms)? Take the first feature's attributes? Drop all attributes?<br>
<br>
Nyall<br>
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