Value Set Definition Standard Project
A New Normative Standard for Value Set Definitions
Contents
Overview
[From the PSS] Describe the elements that make up a “Value Set Definition”, and ballot this as a normative HL7 specification, including a demonstration of how this is met in FHIR profiles and HL7 Model Interchange Format (MIF).
The definition of value sets is a required activity in completing the specification of most health information technology artefacts. To date, the approach for doing so has not been consistent within HL7 constructs and elsewhere. Many of the required elements and approaches are embedded in existing HL7 artefacts but not consistently. Currently, an explicit list of all the fields in an HL7 value set definition are surfaced only in the informative balloted MIF, with a general description of them in the normative Core Principles specification. A more accessible and standardized list of these fields is required to facilitate interoperability and sharing of value set definitions across HL7 artefacts and the Health IT community at large.
Success criteria: Publishing of the normative standard, and a demonstration of value set definitions that conform to this published normative specification.
Project Processes
This project is using DropBox as a collaborative document sharing process during the formative draft development process. If you are interested in viewing the current draft please attend the meetings. If you are interested in participating in the editing and review of the drafts, please send a request to get access to the dropbox folder to Rob McClure ( rmcclure AT mdpartners.com ).
Project Participants
Preparation Tooling
Conference Call Schedule and Minutes
Remember USA is now on STANDARD TIME EST is UTC -5
Meetings changed to every week - Tuesdays @ 4pm EST for 60 min.
Rob is not available NEXT TWO WEEKS - Ted to run or will be cancelled. Watch for cancellations
SAME Mikogo ID
Telephone uses standard HL7 Vocab number: 1 (770) 657-9270,,,598745#
Topic: VSD Regular bi-weekly Meeting Date & Time: Tuesday at 1400 ET Duration: 1 hour
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Click on the following link to download a quick reference guide for participants: http://www.mikogo.com/jump/quickguide?uilang=en
Remember US ET will end Daylight Savings Time on Nov. 2, and EST is -5 UTC
Current Weekly Agenda
We are driving to finish comment review and begin document improvement
- Agenda:
- Continue with few remaining comments
Note - fixed CodeBasedContentSet on 2015-08-21 based on RM and TK skype call. Also added expressions as allowed "code". Need to consider where to place something that would allow expressions as valid members of a value set. Some sort of flag. This is also something that belongs on the binding syntax. Both places likely needed. As a VSD element it would control if the TS should consider an expression as valid - IE< this is a receiver function, and not so much a definition element that requires all potential expressions to be enumerated as "standing members" for any expansion.
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- Running list of Completed Issues:
- Will submit as DSTU in Normative track and not as Normative in first ballot. [2014-07-22]
- We completed the review of the Logical Elements/Functions to define Content Logical Definition based on the MIF
- See Valueset MIF ContentDefinition for updated comments.
- Discussion on how to control use of DYNAMIC defined value sets continued on 12/20 meeting.
- Rob and Lloyd still have to create document and use cases to explain approach to "STATUS" / DYNAMIC stability.
- Metadata sheet review now complete
- Completed discussion of Value Set Expansion metadata with changes added to end of spreadsheet.
- A Value Set Definition can reference 0..* "Trusted Value Set Expansion Reference" that can be a service or an actual expansion
- An Expansion can be characterized by a date (required), a time (optional) and an identifier (optional)
- Completed discussion of Value Set Expansion metadata with changes added to end of spreadsheet.
- As of VSDSpec v18, UML model accurately describes those elements that are "definitional" in that if they change, a new value set or value set version should be created.
- 4/22/14 Completed documentation of determination of VSD version STATUSes
- This initial ballot will leave inclusion of concept expressions as value set members as OUT OF SCOPE. This remains highly important but will be addressed in the following ballot.
- This document has the abstracted decisions from minutes. [1]
- We will allow the use of slightly more complex datatypes (DSET and EN are currently used) [Example content attribute was discussed when this decision was reached]
- Purpose changed to Scope in v24
- We allow NonComputableContent CE to be included in a general CLD, therefore some CLD may have both computable and non-computable content.
- Clarified that Value Set Reference CE should not also allow Code System Constraint Parameters as such a thing could be inconsistent with the actual referenced value set.
- Clarified that the CLD “slot” in the value set version actually should hold, in essence, a “UnionwithContent” operation on the included content expressions. This can either be an implicit description of how to manage the CEs listed, or we can explicitly have a CLD point to 1..1 UnionWithContent
- NCC will remain as part of the MIF-based syntax as a type of Code System Content with LOTS of best practice guidance by Lloyd and Ted. This DOES MEAN that MIF-based syntax CLD is not always computable 2015-06-09
- Items for discussion at upcoming Work Group Meeting
- Acceptable modeling approach to add additional syntax types for CLD (see meeting notes Sept 23rd).
- discussion of Jay Lyle's alternative model approach - he is to identify elements that he has left out and/or added before the WG meeting. Discussion Tuesday Q4.
Final version of the Ballot - here.
Minutes documents:
20131016_VSD_Minutes 20131022_VSD_Minutes 20131030_VSD_Minutes 20131106_VSD_Minutes 20131113_VSD_Minutes 20131120_VSD_Minutes 20131122_VSD_Minutes 20131127_VSD_Minutes 20131129_VSD_Minutes 20131204_VSD_Minutes 20131206_VSD_Minutes 20131211_VSD_Minutes 20131213_VSD_Minutes 20131218_VSD_Minutes 20131220_VSD_Minutes 20140103_VSD_Minutes 20140108_VSD_Minutes 20140115_VSD_Minutes 20140128_VSD_Minutes 20140204_VSD_Minutes 20140211_VSD_Minutes 20140218_VSD_Minutes 20140225_VSD_Minutes 20140304_VSD_Minutes 20140311_VSD_Minutes 20140318_VSD_Minutes 20140325_VSD_Minutes 20140401_VSD_Minutes 20140408_VSD_Minutes 20140415_VSD_Minutes 20140422_VSD_Minutes 20140429_VSD_Minutes 20140513_VSD_Minutes 20140520_VSD_Minutes 20140527_VSD_Minutes 20140603_VSD_Minutes 20140610_VSD_Minutes 20140617_VSD_Minutes 20140701_VSD_Minutes 20140702_VSD_Minutes 20140708_VSD_Minutes 20140722_VSD_Minutes 20140729_VSD_Minutes 20140910_VSD_Minutes 20140923_VSD_Minutes 20140930_VSD_Minutes 20141014_VSD_Minutes 20141021_VSD_Minutes 20141028_VSD_Minutes 20141104_VSD_Minutes 20141125_VSD_Minutes 20141202_VSD_Minutes 20141216_VSD_Minutes 20141223_VSD_Minutes 20141230_VSD_Minutes 20150106_VSD_Minutes 20150113_VSD_Minutes 20150203_VSD_Minutes 20150217_VSD_Minutes 20150303_VSD_Minutes 20150317_VSD_Minutes 20150331_VSD_Minutes 20150414_VSD_Minutes 20150428_VSD_Minutes 20150526_VSD_Minutes 20150609_VSD_Minutes 20150818_VSD_Minutes 20150901_VSD_Minutes 20150915_VSD_Minutes 20150929_VSD_Minutes 20151013_VSD_Minutes 20151020_VSD_Minutes 20151103_VSD_Minutes
Key Target Dates
Resubmission of updated content hopefully right after Jan. 2015 meeting. No need for re-ballot given DSTU status unless we want to do so.
Project Documents
The project working documents are being maintained using Google Docs. These can be found at: Links to project documents