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Note: The current bulk data handling specification does not handle deleted items, and the recommendation is that periodically a complete download should be done to check for "gaps" to reconcile the deletions (which could also be due to security changes), however content shouldn't usually be "deleted" it should be marked as inactive, or end dated.

Proposal: Include deletions bundle(s) for each resource type to report the deletions (when using the _since parameter) which would be in a new property "deletions" in the process output, as demonstrated in the status tracking output section below. This bundle would have a type of "collection", and each entry would be as per a deleted item in a history


    <!-- no resource included for a delete -->
      <method value="DELETE"/>
      <url value="PractitionerRole/[id]"/>
    <!-- response carries the instant the server processed the delete -->
      <lastModified value="2014-08-20T11:05:34.174Z"/>

The total in the bundle will just be the count of deletions in the file, the total in the operation result will indicate the number of deletion bundles in the ndjson (same as the other types).

If the caller doesn't want to use the deletions, they can just ignore the files in the output, and not download those specific files.

List defined subsets

The previous sections are all that is defined by the FHIR Bulk Data extract specification, however we may choose to implement an additional parameter to this operation to permit the selection to also filter to resources that are included in a specified list resource. The approach is similar to the same capability defined by FHIR