DDIInstance, a:Archive, a:Individual, a:Organization, a:OrganizationGroup, a:OrganizationScheme, a:Relation, c:Concept, c:ConceptGroup, c:ConceptScheme, c:ConceptualComponent, c:ConceptualVariable, c:ConceptualVariableGroup, c:ConceptualVariableScheme, c:GeographicLocationGroup, c:GeographicLocationScheme, c:GeographicStructureGroup, c:GeographicStructureScheme, c:SubUniverseClass, c:Universe, c:UniverseGroup, c:UniverseScheme, cm:CategoryMap, cm:Comparison, cm:ConceptMap, cm:QuestionMap, cm:RepresentationMap, cm:UniverseMap, cm:VariableMap, d:ComputationItem, d:ControlConstructGroup, d:ControlConstructScheme, d:DataCollection, d:GeneralInstruction, d:GenerationInstruction, d:IfThenElse, d:Instruction, d:InstructionGroup, d:Instrument, d:InstrumentGroup, d:InstrumentScheme, d:InterviewerInstructionScheme, d:Loop, d:Methodology, d:ProcessingEvent, d:ProcessingEventGroup, d:ProcessingEventScheme, d:ProcessingInstructionGroup, d:ProcessingInstructionScheme, d:QuestionBlock, d:QuestionConstruct, d:QuestionGrid, d:QuestionGroup, d:QuestionItem, d:QuestionScheme, d:RepeatUntil, d:RepeatWhile, d:Sequence, d:StatementItem, d:Weighting, ds:DataSet, g:Group, g:LocalGroupContent, g:LocalHoldingPackage, g:LocalResourcePackageContent, g:LocalStudyUnitContent, g:ResourcePackage, g:SubGroup, l:BaseLogicalProduct, l:Category, l:CategoryGroup, l:CategoryScheme, l:CodeList, l:CodeListGroup, l:CodeListScheme, l:DataRelationship, l:NCube, l:NCubeGroup, l:NCubeScheme, l:RepresentedVariable, l:RepresentedVariableGroup, l:RepresentedVariableScheme, l:Variable, l:VariableGroup, l:VariableScheme, m1:NCubeInstance, m1:RecordLayout, m2:NCubeInstance, m2:RecordLayout, m3:NCubeInstance, m3:RecordLayout, m4:RecordLayout, p:PhysicalDataProduct, p:PhysicalStructure, p:PhysicalStructureGroup, p:PhysicalStructureScheme, p:RecordLayout, p:RecordLayoutGroup, p:RecordLayoutScheme, pi:PhysicalInstance, pi:VariableStatistics, pr:DDIProfile, r:GeographicLocation, r:GeographicStructure, r:ManagedDateTimeRepresentation, r:ManagedMissingValuesRepresentation, r:ManagedNumericRepresentation, r:ManagedRepresentationGroup, r:ManagedRepresentationScheme, r:ManagedScaleRepresentation, r:ManagedTextRepresentation, r:Note, r:OtherMaterial, r:QualityStatement, r:QualityStatementGroup, r:QualityStatementScheme, s:StudyUnit