Update Tagging Merchants

Tagging-Merchants.md

@@ -58,6 +58,12 @@ Each submission will contain information about the source of the data so that ta
 
 ## Tagging Guidance
 
+### Nodes or Ways?
+
+If an existing Node or Way exists, use whatever is already place. If you are adding a new element, you should add a Node representing the merchant at that location. Local taggers will handle tagging buildings as Ways as appropriate.
+
+More information on element types can be found [here]([url](https://wiki.openstreetmap.org/wiki/Elements)).
+
 ### Required Tags
 
 `currency:XBT=yes` - This denotes the bitcoin _currency_ **is** generally accepted, but doesn't specify the supported _payment types_.