| Attribute | Schema Datatype or Enumeration | Usage | Definition | Business Rules |
|---|---|---|---|---|
| CodedValue | text | Required | Value of the codelist item (as it would occur in clinical data). | For ItemDef elements that reference a CodeList element containing CodeListItem child elements, ItemData values must match a CodedValue attribute. |
| Rank | float | Optional | Numeric significance of the CodeListItem relative to others in the CodeList. | If Rank is provided for any CodeListItem in a CodeList, it must be provided for all. |
| OrderNumber | integer | Optional | Ordering on the Items (within a containing CodeListItem) for use whenever a list of Items is presented to a user. | If OrderNumber is provided for any CodeListItem, it must be provided for all. |
| CommentOID | oidref | Optional | Reference to a CommentDef. | Must match the OID for a CommentDef within the Study/MetaDataVersion. |
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