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Message Development Framework (MDF)

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Title: Message Development Framework (MDF)


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Message Development Framework (MDF)
  • Is a Methodology for building HL7 models
  • Is a description for defining HL7 standard
    messages
  • Full instruction book for HL7 participants
  • Basis for member training
  • Five years in development
  • Continues to evolve as we gain experience

5
MDF Model Relationships
Analysis
Design
Voting
Requirements Analysis Use
Case Model (UCM)
Domain Analysis Domain Information
Model (DIM)
Interaction Design Interaction Model (IM
)
Message Design HierarchicalMessageDescr
iptions (HMD)
Approval Ballots
2-nd Order 1 choice of 0-n Drug
0-1 Nursing
Reference Model Repository
RIM
6
Models developed in Phases
7
Models are used to build the HMD
Reference
Information Model
Interaction
Model
Common
Hierarchical
Message
Message
Element
Description
Types
8
The HMD ITS then give messages
9
Committee Vs. HL7 RIM
  • What is the RIM?
  • A HL7-wide common reference model that integrates
    all Technical Committees domain views
  • Why do we need a common model?
  • To ensure consistency of concepts
  • To ensure consistent vocabulary
  • How will we coordinate these efforts?
  • Iterative reviews
  • Harmonization meetings
  • Who controls the RIM?
  • The MM committee
  • Format, syntax, style
  • Revision histories
  • The Technical Steering Committee
  • Dispute resolution
  • Overseer

10
Reference Information Model Domain Subject Areas
  • Stakeholders
  • Patient
  • Person
  • Stakeholder
  • Healthcare_service_ provider
  • Organization
  • Healthcare finances
  • Patient_billing_account
  • Healthcare_benefit_plan
  • Guarantor_contract
  • Patient_encounters
  • Pharmacy_service_event
  • Scheduling
  • Patient_service_location
  • Patient_service_order
  • Patient_encounter
  • Patient_service_event
  • Patient_clinical_pathway
  • Master_tables
  • Clinical_pathway_master
  • Service_catalog_item
  • Observation_service_ catalog_item

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RIM Harmonization Process
Prepare RIM Change Proposal
Document Rationale for not supporting RIM change
proposal
Present RIM Harmonization Report to TSC
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Sources of Models for Harmonization
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Reference Information Model Subject Classes
  • The Subject Classes are those classes in the RIM
    that express the concepts that are central to
    managing healthcare, e.g. Patient, Order.
  • Subject Classes are the focus for trigger events,
    use cases application roles.
  • State transition modeling of Subject Classes
    discovers potential trigger events.
  • Subject Classes capture the domain behaviors that
    the HL7 committee feels are most important

14
State Transition Modeling
  • Identify States
  • From Use Cases
  • Document States
  • Which attributes must be valued/unvalued?
  • What are the constraints on the values?
  • What associations must be established?
  • What associations must not exist?
  • Capture State Model
  • UML State Transition Model

15
Message Design
16
Message Specification
17
Message Information Model (MIM)
18
Information Model Mapping
MIM and R-MIM
19
Putting the pieces together
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How this is done
  • UML and the Rational Rose toolset is used to
    capture many models
  • HL7 has developed a large number of tools and
    templates to assist in the process
  • Detailed tools training tutorials are held during
    Work Group meetings and harmonization meetings
  • Model and Methods is the overseer of the tools
    and the process
  • URL to download Tooling
  • http//www.mcis.duke.edu/standards/HL7/committees
    /methodology-modeling/Rose tooling/
  • this includes a text file to describe what each
    downloadable file is
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