# externalDataBlock

### Properties

| Block Property | Definition                                                                                                                     | Example Input                             | Status |
| -------------- | ------------------------------------------------------------------------------------------------------------------------------ | ----------------------------------------- | ------ |
| type           | Receives data from the external source and passes them over the the next block.                                                | **externalDataBlock** (Can't be changed). |        |
| tag            | Unique name for the logic block.                                                                                               | mrv\_source.                              |        |
| permissions    | Which entity has rights to interact at this part of the workflow.                                                              | Installer.                                |        |
| defaultActive  | Shows whether this block is active at this time and whether it needs to be shown.                                              | Checked or unchecked.                     |        |
| entityType     | Specify the type of Entity this workflow block is for.                                                                         | MRV.                                      |        |
| schema         | Pre-configured schemas relevant for download to be selected from the drop down of available schemas in your Guardian instance. | MRV.                                      |        |

### Events

| Property Name | Name in JSON | Property Value                                                    | Value in JSON                          | Description                                                                                                                     |
| ------------- | ------------ | ----------------------------------------------------------------- | -------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------- |
| Event Type    | -            | <p>Input Event</p><p>Output Event</p>                             | -                                      | Type of the event - determines whether this is ingress or egress event for the current block.                                   |
| Source        | "source"     | Block tag(string)                                                 | "block\_tag"                           | The block which initiates the event.                                                                                            |
| Target        | "target"     | Block tag(string)                                                 | "block\_tag"                           | The block which receives the event.                                                                                             |
| Output Event  | "output"     | Event name(string)                                                | "event\_name"                          | Action or issue that caused the event.                                                                                          |
| Input Event   | "input"      | Event name(string)                                                | "event\_name"                          | Action which will be triggered by the event.                                                                                    |
| Event Actor   | "actor"      | <p>Event Initiator</p><p>Document Owner</p><p>Document Issuer</p> | <p>""</p><p>"owner"</p><p>"issuer"</p> | Allows to transfer control of the block (execution context) to another user. Empty field leaves control at the Event Initiator. |
| Disabled      | "disabled"   | True/False                                                        | true/false                             | Allows to disable the event without deleting it.                                                                                |

To know more information about events, please look at [Events](https://guardian.hedera.com/guardian/standard-registry/policies/policy-creation/introduction/events).