Label Only Data Storage
Label-only members are virtual members; they are typically used for navigation and have no associated data. Note:
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You cannot assign level 0 members as label-only.
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Label-only members can display values.
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Making dimension members label-only minimizes database space by decreasing block size or number of blocks.
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You cannot assign attributes to label-only members.
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In a multicurrency application, you cannot apply label-only storage to members of these dimensions: Entity, Versions, Currencies, and user-defined custom dimensions. To store exchange rates, use Never Share.
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Data Storage for children of label-only parents is set to Never Share by default.
Caution:
Do not design forms in which label-only parents follow their first child member, as you cannot save data in the first child member. Instead, create forms with label-only parents selected before their children, or do not select label-only parents for forms.