This guide will walk you through the steps to create a process model that generates custom metadata using a metadata extraction path and how to query that metadata using process instance filtering.
## Step 1: Define the Process Model
**Create a New Process Model**:
- Navigate to the "Processes" section in SpiffArena.
- Click on "Add a process model" and fill in the required fields as described elsewhere.
- In the process model form, specify the metadata extraction path.
- This path is used to extract data from your process instances for quick access in searches and perspectives.
- Example: If you have a script task that sets `great_color = "blue"`, set both the extraction key and extraction path to `great_color`.
- Save the process model.
## Step 2: Start the Process
1.**Initiate the Process**:
- Navigate to the "Home" section and click on "Start New" to initiate the process.
- Select the process model you created and start a new instance.
2.**Monitor Process Execution**:
- Track the progress of the process instance to ensure it completes successfully and actually generates appropriate task data, such as `great_color` or whatever specific data you are looking for.
## Step 3: Query Custom Metadata
1.**Navigate to Process Instances**:
- Go to the "Process Instances" section to view all instances.
2.**Expose a column for your Custom Metadata attribute**:
- Use the plus icon to add a column.
- Select the metadata field you defined in the extraction path and click Save.
- You should now be able to see your custom metadata as a new column in the process instance report.
3.**View Filtered Results**:
- You can also filter process instances based on your custom column using the same column options.
By following these steps, you can create a process model that generates custom metadata and efficiently query that metadata using process instance filtering.
