<div dir="ltr"><b>square_paving_stones:width</b> may well lead to<b> trapezoidal_paving_stones:geometry</b>, and more craziness.<br><br>How about:<br><br><b>surface=paving_stones</b><br><b>paving_stones:detail</b>=whatever you want<br><b>paving_stones:detail</b>=20cm square<br><b>paving_stones:detail</b>=hello kitty shape, 50cm from chin to bow<br><br>Google has proven that natural language parsing (e.g. pulling the dimensions out of the above) works good enough.</div>