View source for Update RIM description of ExecutionAndDeliveryTime

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|bgcolor="#aaaaff" align=center| '''Recommendation for HL7 RIM Change'''
|bgcolor="#bbbbff"| '''RECOMMENDATION ID:'''
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|| Sponsored by: ''InM - Infrastructure and Messaging''
|| Approval date by committee: to be approved
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|| Revision (# and date): n.a. - see Wiki history page
|| Date submitted:
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|| Editor/Author: ''René Spronk''
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|| PROPOSALNAME: ''Update RIM description of ExecutionAndDeliveryTime''
|| &nbsp;
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== Stewards Position ==
REQUIRED - This table should contain one row for each Steward Committee affected by the recommendation.
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|bgcolor="#aaaaff" align=center| '''TC'''
|bgcolor="#bbbbff" align=center| '''RECOMMENDATION APPROVAL STATUS'''
|bgcolor="#aaaaff" align=center| '''AFFECTED ENTITIES OF INTEREST TO TC''' <br/> (responsibility level: S=Steward; I=Interested)
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|| ''InM - Infrastructure and Messaging''
|| ''Approved'' (See [[Extend usage of ExecutionAndDeliveryTime]])
|| ''S''
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== Issue ==
Redefine (in a backwards compatibe fashion) the description of the QueryByParameter.executionAndDeliveryTime attribute in the RIM. 

The current definition doesn't specify how the attribute should be interpreted in the case of a Deferred or Immediate query. HL7 version 2 contains a definition for its interpretation within Deferred queries; this proposal seeks to add a definition of its interpration in Immediate queries.

For ''Immediate queries'' executionAndDeliveryTime should be interpreted as the point in time '''before''' which the responding system should have send a response. This to avoid waiting for an undefined period of length by a system that has just sent a query. The responding system may elect to send a query-response with zero results in it, forcing the querying system to send a 'query continuation interaction' to get hold of a next part of the result set.

== Recommendation(s) ==
Change the defintion of the executionAndDeliveryTime as shown below:

=== RIM Recommendation(s) ===
Change the current definition of executionAndDeliveryTime from

 3.6.10.7 QuerySpec.executionAndDeliveryTime:: TS (0..1)
 Definition:Specifies the time the response is to be returned.

to

 3.6.10.7 QuerySpec.executionAndDeliveryTime:: TS (0..1)
 Definition: Specifies the time the response is to be returned. 
 If the query priority is Deferred, then executionAndDeliveryTime should be interpreted as the 
 point in time when the response should be sent.
 If the query priority is Immediate executionAndDeliveryTime should be interpreted as the 
 point in time '''before''' which the responding system should have send a response. 

The proposed change is backwards compatible.

The semantics of the above  description for Deferred queries is based on the corresponding v2 field:

Current definition of RCP-4: (which InM has agreed to extend by similar wording as the above for v3)
 5.5.6.4    RCP-4   Execution and Delivery Time   (DTM)   01441
 Definition:  Specifies the time the response is to be returned.  This
 field is only valued when RCP-1-Query priority contains the value D
 (Deferred).

=== Vocabulary Recommendation(s) ===
*Not applicable.

== Rationale ==
*The specification of a 'timeout' fits within the current description of the semantics of this attribute. The alternative would be to create a new attribute - this isn't seen as a necessity given the semantic match. 
*Note that the proposed definition still holds when a new query priority should be added to the UV QueryPriority value set.
*A similar proposal has been approved for HL7 version 2. The definition of RCP-4 will be changed for those cases where 

== Recommended Action Items ==
*Implement the proposed solution


==Discussion==

*See [[Extend usage of ExecutionAndDeliveryTime]] for the original InM proposal, and motion of approval of the proposal.

== Resolution ==


[[Category:Harmonization Proposal]]