| Attribute | Schema Datatype or Enumeration | Usage | Definition | Business Rules |
|---|---|---|---|---|
| ItemOID | oidref | Optional | References the ItemDef that provides the variable metadata. | Must match the OID for an ItemDef element. This ItemDef element can be in the same ODM document or another ODM document. |
| ItemGroupOID | oidref | Optional | References the ItemGroupDef that provides the ItemGroup or dataset metadata. | Must match the OID for an ItemGroupDef element. This ItemGroupDef element can be in the same ODM document or another ODM document. |
| MetaDataVersionOID | oidref | Optional | References the MetaDataVersion that provides the metadata when referencing another ODM document. | Must match the OID for a MetaDataVersion element. This MetaDataVersion element can be in the same ODM document or another ODM document. Must be provided if the reference is not to an object within the same MetaDataVersion element. |
| StudyOID | oidref | Optional | References the Study that provides the metadata when referencing another ODM document. | Must match the OID for an Study element. This Study element can be in the same ODM document or another ODM document. Must be provided if the reference is not to an object within the same Study element. |
| leafID | IDREF | Optional | References a leaf element that provides a reference to another ODM document. This is necessary when the source ItemOID references an ItemDef contained in a different ODM document. | When referencing another ODM document it is necessary to have values for the MetaDataVersionOID and StudyOID attributes. |
| Name | name | Optional | Provides a way to connect an argument to a parameter when SourceItems are inputs to methods. It allows the name used in the programming code in the method description to make it easier to trace the use of the value. |
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