A few properties are given special meaning when rendered in the Target pane. Some are automatic. Others can be added with the + button when Using the Injector Pane.
# Nodes
The optional "url" property add the link icon 🔗 and makes the node clickable.
# Relations
The automatic "source" property identifies what Beam item contributed a relation and will show when hovering over a relation name.
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When nodes are merged the node properties are merged too unless there is conflicting values. In this case one is chosen without any promise as to which will win.