Avoid validation warning for choices that are allowed to occur multiple times

[JohannaOtt]

Description done with an example case to make the schema construct easier to understand: Work with omso:ProfileObservation

The element result.ReferenceableGridCoverage.rangeSet.ValueArray.valueComponents can contain multiple occurrences of the choice used in it. That means, if multiple values (e.g. AbstractValue.Count and AbstractValue.QuantityList) are provided for one object, the transformed data should be valid. But there is a validation warning:

According to the relevant schema,

• ValueArray (expanding CompositeValue) is referencing valueComponent
• valueComponents is using the ValueArrayPropertyType
• the ValueArrayPropertyType is using a sequence with group:Value that can occur n times (unbounded) --> this means that it can be replaced by multiple group:Value elements (which are using various abstract elements respectively their children) and there should be no validation warning in hale studio

[github-actions[bot]]

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