- id: 1
  note_id: 1        # log/2021-01-03.md
  collection_id: 1  # tag:fiction
- id: 2
  note_id: 1        # log/2021-01-03.md
  collection_id: 2  # tag:adventure
- id: 3
  note_id: 2        # log/2021-01-04.md
  collection_id: 3  # genre:fiction
- id: 4
  note_id: 5        # ref/test/b.md
  collection_id: 2  # tag:adventure
- id: 5
  note_id: 4        # f39c8.md
  collection_id: 4  # tag:fantasy
- id: 6
  note_id: 5        # ref/test/b.md
  collection_id: 5  # tag:adventure