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- The CompoundSetExpression specialization is used to define compound expressions in the AnalysisSet specialization of the WhereClause class, as shown in the AnalysisSet section.
- The CompoundSubsetExpression specialization is used to define compound expressions in the DataSubset specialization of the WhereClause class, as described shown in the DataSubset section.
- The CompoundGroupExpression specialization class is used to define compound expressions in the Group specialization of the WhereClause class, as described shown in the GroupingFactor section.
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- In instances of either the WhereClauseCompoundExpression class itself (which is used in instances of the WhereClause class) or the CompoundSubsetExpression specialization (which is used in the DataSubset specialization of the WhereClause class), the whereClauses attribute contains specification(s) of sub-clauses, each represented as an instance of the WhereClause class, in which:
- The level is 1 greater than the level of the instance of the WhereClause in which the compound expression is being defined.
- The order attribute is:
- used to order this sub-clause with respect to the other sub-clauses with which it is being combined (i.e., 1 for the first, 2 for the second, etc.)
- assigned as "1" for a sub-clause that is being negated.
- Either the condition attribute is used to specify the sub-clause as a simple condition (for sub-clauses being combined) or the compoundExpression attribute is used to specify the sub-clause as another compound expression.
- In instances of the CompoundSetExpression specialization (which is used in the AnalysisSet specialization of the WhereClause class), the whereClauses attribute can only contain other instances of the AnalysisSet class referenced by identifier value.
- In instances of the CompoundGroupExpression specialization (which is used in the Group specialization of the WhereClause class), the whereClauses attribute can only contain other instances of the Group class referenced by identifier value.
- In instances of either the WhereClauseCompoundExpression class itself (which is used in instances of the WhereClause class) or the CompoundSubsetExpression specialization (which is used in the DataSubset specialization of the WhereClause class), the whereClauses attribute contains specification(s) of sub-clauses, each represented as an instance of the WhereClause class, in which:
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| Note |
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Note that the ARS model is designed to support the specification of analyses of data in ADaM datasets, which are expected to be "analysis-ready". In analysis-ready datasets, any complex criteria needed to define either subject populations or the grouping of data for analysis will usually have been applied to create flagging or grouping variables. These flagging and grouping variables can usually then be referenced in the specification of simple conditions, so the use of compound expressions in the definition of subject populations (using the AnalysisSet class) or groups within grouping factors (using either the AnalysisGroup or DataGroup class) is expected to be limited. |
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