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AttributeSchema Datatype or EnumerationUsageDefinitionBusiness Rules
OIDoidRequiredUnique identifier for the Transition element.The Transition/@OID values must be unique within a study.
NamenameRequiredHuman readable name for the transition between two structural elements in a WorkflowDef element.The Transition/@Name must be unique within a study.
SourceOIDoidref Required

References the definition of the source structural element for the transition. The structural element may be a StudyEventGroupDef, StudyEventDef, ItemGroupDef, ItemDef, or Branching element.

The SourceOID must match the OID attribute of a StudyEventGroupDef, StudyEventDef, ItemGroupDef, ItemDef, or Branching child element of the MetaDataVersion parent element of the WorkflowDef.
TargetOIDoidrefRequired

References the definition of the target structural element for the transition.  The structural element may be a StudyEventGroupDef, StudyEventDef, ItemGroupDef, ItemDef, or Branching element.

The latter will be used when there is a branching definition necessary as a result of the transition.

The TargetOID must match the OID attribute of a StudyEventGroupDef, StudyEventDef, ItemGroupDef, ItemDef, or Branching child element of the MetaDataVersion parent element of the WorkflowDef.
StartConditionOIDoidrefOptionalThe StartConditionOID references a ConditionDef specifying a condition that must be met for the transition to start. For example, if the source structural element is a StudyEventGroupDef describing the activities for study screening and the target structural element is a StudyEventGroupDef describing study enrollment, the ConditionDef referenced by the StartConditionOID specifies the criteria that must be met for a subject to transition from screening to enrollment.The StartConditionOID must match the OID attribute of a ConditionDef child element of the MetaDataVersion parent element of the WorkflowDef.
EndConditionOIDoidrefOptionalThe EndConditionOID references a ConditionDef defining the condition under which the transition can be completed. As long as the condition is not met, the transition to the next actitivity or event must be considered to be temporary blocked. When the target structural element can be considered to be a "visit," the condition can be regarded as a visit entry criterion.The EndConditionOID must match the OID attribute of a ConditionDef child element of the MetaDataVersion parent element of the WorkflowDef.
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