that would be possible if we modify the meaning of the CONTAINS operator to mean contains-by-value (like ENTRYs inside a COMPOSITION) /or /contains-by-reference, which is the FOLDERs case - as you have long argued ;)

Not hard technically as far as I can see - but it does mean a modification to all existing AQL implementations, and of course AQL itself.

- thomas

On 20/08/2018 10:21, Ian McNicoll wrote:
Yup but AQL is so cool for this kind of thing :)

I still want to do

Select c FROM EHR Contains folder x contains composition c

since logically folder x contains compositions.

Ian

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