Folder Style assigned by metadata
From OpenKM Documentation
The script assign folder style to folder based in database metadata values present into document contents into.
Property group:
<property-group label="Invoice status" name="okg:invoicedata">
<select label="Status" name="okp:invoicedata.status" type="simple">
<option label="Open" value="open" />
<option label="Pending to review" value="review" />
<option label="Closed" value="closed" />
</select>
</property-group>