turbaszek edited a comment on pull request #15142:
URL: https://github.com/apache/airflow/pull/15142#issuecomment-812618291


   When doing operators for adding labels it would be good to check if they 
work with lineage operators (`>` and `<` afaik).
   
   @andrewgodwin would you mind elaborating more about the use case for the 
labels? In my understanding all the actions are performed by tasks and edges in 
DAGs represent only order (and sometimes data) relation. Adding a label to edge 
would suggest that some action is performed between tasks. Is it done by XCom 
or something?


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