Deal with list fields #20
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Fields which contain lists of more than one object (whether that's a dictionary, list etc) are stored in a single column with the FHIR field name appended with "_dense".
We don't expect this to be a common pattern for heavily used parts of the data. If found to be common, for lists of codeableConcept types a second column "x_denseCodes" listing just the codes in the adopted "url|code" format could also be provided to increase search speed. The "x_dense" column will remain to aid reconstruction into standard FHIR.