Update data model

Author: mjbear

docs/dev/data_model.md

@@ -57,5 +57,5 @@ Example: Imagine the extra programming logic needed to consume structured data w
 | `PREFIX_LENGTH`                  | instead of PREFIX or CIDR for the numbers of a slash notation or CIDR mask |
 | `PROTOCOL`                       | instead of PROTO |
 | `ROUTER_ID`                      | for local router IDs (local to the device being parsed) |
-| `VLAN_ID`                        | instead of VLAN or TAG |
-| `VLAN_NAME`                      | VLAN name or description |
+| `VLAN_ID`                        | instead of VLAN, TAG, or PVID (Port VLAN ID) |
+| `VLAN_NAME`                      | VLAN name or VLAN description |