Agree that the dimensions for disaggregation should be exactly the same for baselines, actuals and targets. Doesn't that mean that if dimensions are used that it is mandatory to use exactly the same dimensions for baselines actuals and target? In other words, the disaggregation dimensions should always be the same in order to make baseline, actuals and targets comparable. So different levels of disaggregation within the same indicator are not allowed.
1) Change cardinality of “target” and “actual” from 0..1 to 0..*
2) Implement suggestions relating to Principle 7.2 (see http://discuss.iatistandard.org/t/results-discussion-space-and-tag-2016-17-path/502/ ) so that baselines can also be disaggregated
3) Update iatistandard.org to note that multiple target and actuals should only be used per period for disaggregation.
In other words: each combination of dimension values should be unique within one period of an indicator.