Agree with recommendation but will defer adding a profile of Parameter to a future publication based on priorities of other additional features that need to be added for the STU 4 publication cycle. Consider the profile of a Parameter resource for future versions. For this version, add the following to  http://hl7.org/fhir/us/cqfmeasures/2023Jan/measure-repository-service.html#package For the $package operation, when combinations of "in" parameters specify more than one measure to package, the operation SHOULD return an OperationOutcome error. These combinations include the following: The "id" input (in) parameter and Measure/ {id} /$package have different values for the id,_ More than one of "id", "url" or "identifier" input parameters are specified If Measure/{id} /$package is used to specify the measure, then url and identifier "in" parameters must not be present in the Parameters resource or as a URL parameter Implementations are not required to support mixing of "in" parameters in the URL and inside a POSTed Parameters resource; it is acceptable to return an OperationOutcome if mixing is not supported. Implementation MAY support such mixing of input parameters. These constraints are applicable even if if some or all of the in parameters are specified in the URL