silverstripe-framework/tests/model/HierarchyTest.yml

Page:
   page1:
      Title: Page 1
   page2:
      Title: Page 2
   page3:
      Title: Page 3
   page2a:
      Parent: =>Page.page2
      Title: Page 2a
   page2b:
      Parent: =>Page.page2
      Title: Page 2b
   page3a:
      Parent: =>Page.page3
      Title: Page 3a
   page3b:
      Parent: =>Page.page3
      Title: Page 3b
   page2aa:
      Parent: =>Page.page2a
      Title: Page 2aa
   page2ab:
      Parent: =>Page.page2a
      Title: Page 2ab
   page3aa:
      Parent: =>Page.page3a
      Title: Page 3aa
   page3ab:
      Parent: =>Page.page3a
      Title: Page 3ab