Tree
The org-chart look comes from pinning the sides: every edge leaves the parent's south and enters a child's north. Left free, an orthogonal edge leaves whichever side faces the child, so the outer two would come out the parent's flanks and into the children's sides. Pinning s→n makes them share one drop from the parent and fan out along a level — the T-junction bus every org chart is drawn with.
Result
Source examples/tree.svgn
<diagram padding="30" theme="light">
<style>
.root { fill: #f6e7ec; stroke: #7c2c43; }
</style>
<column gap="52" align="center">
<rect id="root" class="root" label="CEO"/>
<row gap="40">
<rect id="eng" label="Engineering"/>
<rect id="sales" label="Sales"/>
<rect id="ops" label="Operations"/>
</row>
</column>
<!-- The org-chart look comes from pinning the sides: every edge leaves the
parent's south and enters a child's north. Left free, an orthogonal edge
leaves whichever side faces the child, so the outer two would come out the
parent's flanks and into the children's sides. Pinning s→n makes them
share one drop from the parent and fan out along a level — the T-junction
bus every org chart is drawn with. -->
<connect from="root" to="eng" routing="orthogonal" from-anchor="s" to-anchor="n"/>
<connect from="root" to="sales" routing="orthogonal" from-anchor="s" to-anchor="n"/>
<connect from="root" to="ops" routing="orthogonal" from-anchor="s" to-anchor="n"/>
</diagram>