add implicitStandanloneThingCreation mapper description

Signed-off-by: marianne-klein <marianne.klein@bosch.io>

documentation/src/main/resources/pages/ditto/connectivity-mapping.md

@@ -66,7 +66,8 @@ The following message mappers are included in the Ditto codebase:
 | [Normalized](#normalized-mapper) | Transforms the payload of events to a normalized view. |  | ✓ |
 | [ConnectionStatus](#connectionstatus-mapper) | This mapper handles messages containing `creation-time` and `ttd` headers by updating a feature of the targeted thing with [definition](basic-feature.html#feature-definition) [ConnectionStatus](https://vorto.eclipse.org/#/details/org.eclipse.ditto:ConnectionStatus:1.0.0). | ✓ |  |
 | [RawMessage](#rawmessage-mapper) | For outgoing message commands and responses, this mapper extracts the payload for publishing directly into the channel. For incoming messages, this mapper wraps them in a configured message command or response envelope. | ✓ | ✓ |
-| [ImplicitThingCreation](#implicitthingcreation-mapper) | This mapper handles messages for which a Thing should be created automatically based on a defined template| ✓ |  |
+| [implicitThingCreation](#implicitthingcreation-mapper) | This mapper handles messages for which a Thing should be created automatically based on a defined template. | ✓ |  |
+| [implicitStandaloneThingCreation](#implicitstandalonethingcreation-mapper) | This mapper handles messages for which a Thing should be created automatically based on a defined template. | ✓ |  |
 
 ### Ditto mapper
 
@@ -246,11 +247,13 @@ Example configuration:
    * `ditto-message-feature-id` (optional): Include to send the message or message response to a feature of the thing.
      Exclude to send it to the thing itself. Default to `{%raw%}{{ header:ditto-message-feature-id }}{%endraw%}`.
 
-### ImplicitThingCreation Mapper
+### ImplicitThingCreation mapper
 
 This mapper implicitly creates a new thing for an incoming message. 
 
-The created thing contains the values defined in the template, configured in the `mappingDefinitions` `options`.<br/>
+The created thing contains the values defined in the template, configured in the `mappingDefinitions` `options`.
+
+In this case we assume that a gateway device will register the attached edge devices, thus the device will communicate via the gateway.
 
 #### Configuration options
 
@@ -269,6 +272,30 @@ The created thing contains the values defined in the template, configured in the
  }
  ```
 
+### ImplicitStandaloneThingCreation mapper
+
+This mapper implicitly creates a new thing for an incoming message. 
+
+The created thing contains the values defined in the template, configured in the `mappingDefinitions` `options`.
+
+In this case we assume that a standalone device needs to be registered.
+
+#### Configuration options
+
+* `thing` (required): The values of the thing that is created implicitly. It can either contain fixed values
+ or header placeholders (e.g. `{%raw%}{{ header:device_id }}{%endraw%}`).
+
+ Example of a template defined in  `options`:
+ ```json
+ {
+   "thing": {
+   "thingId": "{%raw%}{{ header:device_id }}{%endraw%}",
+   "attributes": {
+     "CreatedBy": "ImplicitStandaloneThingCreation"
+   }
+  }
+ }
+ ```
 
 ## Example connection with multiple mappers