silverstripe-framework/tests/model/DataObjectSchemaTest.yml

Namespaced\DOST\MyObject:
  object1:
    Title: 'Object 1'
    Description: 'Description 1'

Namespaced\DOST\MyObject_CustomTable:
  customtable1:
    Title: 'Custom Table 1'
    Description: 'Description A'
  customtable2:
    Title: 'Custom Table 2'
    Description: 'Description B'
  customtable3:
    Title: 'Custom Table 3'
    Description: 'Orphaned item'

Namespaced\DOST\MyObject_NestedObject:
  nested1:
    Title: 'Nested 1'
    Description: 'Nested Description'
    Content: '<p>Hello!</p>'

Namespaced\DOST\MyObject_NoFields:
  nofields1: {}

Namespaced\DOST\MyObject_NamespacedTable:
  namespaced1:
    Title: 'Namespaced 1'
    Owner: =>Namespaced\DOST\MyObject_NoFields.nofields1

Namespaced\DOST\MyObject_Namespaced_Subclass:
  subclass1:
    Title: 'Subclass 1'
    Details: 'Oh, Hi!'
    Children: =>Namespaced\DOST\MyObject_CustomTable.customtable1, =>Namespaced\DOST\MyObject_CustomTable.customtable2