Data Description
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Item Types
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DDI has 13 item types related to Data Description.

.. toctree::
   :maxdepth: 1

   ../../item-types/ConceptualVariable/index
   ../../item-types/RepresentedVariable/index
   ../../item-types/Variable/index
   ../../item-types/PhysicalInstance/index
   ../../item-types/DataRelationship/index
   ../../item-types/ManagedDateTimeRepresentation/index
   ../../item-types/ManagedMissingValuesRepresentation/index
   ../../item-types/ManagedNumericRepresentation/index
   ../../item-types/ManagedScaleRepresentation/index
   ../../item-types/ManagedTextRepresentation/index
   ../../item-types/NCube/index
   ../../item-types/VariableStatistics/index
   ../../item-types/Weighting/index