HAPI FHIR MDM Resource Types

[Aileen Stehn]

I wanted to match patient resources with fhir hapi mdm, and it worked. Now I wanted to add the diagnosis date as an additional matching variable. I know that this is usually done via the condition resource, so I linked the patient resource to the condition resource so that each patient created also has an associated condition resource with the diagnosis date. When I specify in the MDM rules that I want to use the diagnosis date variable from the condition for the match, I notice in the results that this variable is not being used. However, if I only post the condition resources and use the diagnosis date as the matching variable, the comparison works correctly. Does matching only work for resources within the same resource type?