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The ItemGroupDataSeq doesn’t have any other meaning than the sequence in which the items are saved and exchanged for each ItemGroupDef. It is equivalent to the observation # in a dataset.
PROPOSED BUSINESS RULE (Jozef): ItemGroupDataSeq may only be used when ItemGroupData is a direct child of either ClinicalData or ReferenceData and the ItemGroupData represents a row in a dataset. Jira server Issue Tracker (JIRA) columnIds issuekey,summary,issuetype,created,updated,duedate,assignee,reporter,priority,status,resolution columns key,summary,type,created,updated,due,assignee,reporter,priority,status,resolution serverId 85506ce4-3cb3-3d91-85ee-f633aaaf4a45 key ODM-20
ItemGroupData can also occur as reference data. In that case, the ItemGroupOID and ItemGroupRepeatKey pair must be unique within the reference data.
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