Single Relation
Overview of the Single Relation relational data classification tool in Ango Hub
The Single Relation labeling tool allows you to create a relation between two annotations.
How to add a Single Relation tool to your project
From the project’s Settings tab, enter the Label Set section.
Click on Add Category. From the list that appears, click on Single Relation.
A new row will appear named Single Relation. Click on it to expand it.
Give your single relation tool a title and description.
Enable the Required toggle if you want to force labelers to create a single relation for each asset. When the toggle is disabled, labelers will be able to save and move to the next asset without creating the single relation.
How to Draw a Single Relation
Click on the label where you’d like the single relation to start. Click on the second label where you’d like the relation to end. Press N on your keyboard to finalize the relation.
After having created the relation, you can change its direction by clicking on the 
small arrow inside the relation's box.
Single Relation Directions
Forward: the first label points at the second label.
Backward: the second label points at the second label.
Bidirectional: The labels point at each other.
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