Common Terminology Services 2 CTS 2 Submission Team Status Update HL7 Vocabulary Working Group May 17, 2011

Goals Brief History Review timeline and next steps Specification layout and approach HL7 Vocabulary Structures in CTS 2 – Code System, Concept, Concept Domain, Value Set, Binding – HL7 Change Set 2© Copyright 2011, Mayo Clinic2011/05/17

History Working through the HSSP Process… Work actually began around 2006 in HL7 Issued by HL7 as a Service Functional Model (SFM) in Fall 2009 – SFM RFP issued by OMG 2010 Preliminary submissions June 2010 – Mayo Clinic – II4SM Final submissions due May 23, 2011 – For June OMG meeting 3© Copyright 2011, Mayo Clinic2011/05/17

Current Activities Mayo working on completing, packaging and publishing documentation and examples Submit OMG CTS2 Revised Submission on May 23, Four weeks to provide minimal changes to the revised submission. Final Submission presented to OMG during Technical Meeting June /05/17© Copyright 2011, Mayo Clinic4

OMG Timeline 5© Copyright 2011, Mayo Clinic Event or ActivityDatePurpose Revised Submissions DueMay 23, 2011Submit final submission. OMG Technical Meeting (Salt Lake City, UT)June 20-24, 2011 To present final revised submission to OMG and obtain numerous votes. Revised Submission Presentation June 20-24, 2011Present CTS 2 final submission. Final evaluation and selection by TF / Recommendation to AB and TC June 20 and 23, 2011 OMG Process TC Vote to recommend specification June 20, 2011OMG Process [Anticipated] Approval of recommendation by Architecture Board / Review by TC June 23, 2011OMG Process Platform Technical Committee Adoption Vote June 24, 2011 OMG Process Assign Charter Finalization Task Force Following the passing of the spec, a finalization task force is chartered (FTF) to address technical issues that arise from implementation feedback based upon the publicly available spec. Publication of Beta Specification to OMG websiteJuly 2011Specification available for implementers. OMG Technical Meeting (Jacksonville, FL)September 10-14, 2012 Attend Healthcare DTF and Ontology PSIG meetings. Attend final vote by Board of Directors to adopt specification. 2011/05/17

Specification Layout Platform Independent Model (PIM) – (Very) formal specification – Purpose is to, as unambiguously as possible, define the meaning and behavior (semantics) of any compliant implementation. – View as the equivalent of a formal specification for implementing a language (C, Java, etc.) 2011/05/17© Copyright 2011, Mayo Clinic6

Specification Layout REST PSM – Based on “Representational State Transfer” (REST) – Basic model: Resources – one XML Schema per component Functionality – mapping to URLs that accomplish all functionality SOAP PSM – Web services. Same schema, but functionality is invoked via SOAP procedure calls – Targeting cross platform federation (mix of REST and SOAP nodes 7© Copyright 2011, Mayo Clinic2011/05/17

Compliance Resource orientation provides fine-grained implementation / compliance points Semantic Components – Which resources are represented by the service Functional Components - What functionality the service provides 8© Copyright 2011, Mayo Clinic2011/05/17

CTS2 Semantic Components Code System Catalog– a catalog of terminologies, who publishes them, how often Code System Version – information about code system releases Entity Description – Concepts, textual definitions, terms (concept + description + language tables) Association – formal concept / concept relationships (relationship and ancillary) 9© Copyright 2011, Mayo Clinic2011/05/17

CTS2 Semantic Components (continued) Value Set Catalog– a catalog of value sets, their purpose, etc. Value Set Definition – the formal rules for creating and resolving value sets Map Catalog– a catalog of maps, their purpose, etc. Map Version – map rules – based on a combination of the RF2 extended map model and GEM 10© Copyright 2011, Mayo Clinic2011/05/17

CTS2 Semantic Components (continued) Concept Domain Catalog– a catalog of abstract data elements and their meanings. Concept Domain Binding – the association of concept domains and value sets (w/ optional Statement – the interface between RDF rendering and structured XML 11© Copyright 2011, Mayo Clinic2011/05/17

CTS2 Functional Components Read – retrieval by URI or primary identifier Query – ability to construct queries and filters Import/Export – import and export from different formats such as RF2 Incremental Update – push/pull updates across federated nodes History – what happened and when Temporal – what the service looked like on a given date 12© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Code System Core Principles Definition: “A Code System is a managed collection of Concept Representations, including codes, but sometimes more complex sets of rules and references, optionally including additional Concept Representations playing various roles including identifiers of the concepts, human- readable text, etc.” 13© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Code System 14© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Concept Core Principles Definition: “A Concept is a unitary mental representation of a real or abstract thing – an atomic unit of thought. It should be unique in a given Code System.” 15© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Concept 16© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Concept Domain Core Principles Definition: “An HL7 Concept Domain is a named category of like concepts (a semantic type) that is specified in the Vocabulary Declaration of an attribute in an information model or property in a data type, whose data types are coded or potentially coded, and may be used in a Context Binding.” 17© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Concept Domain 18© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Binding Core Principles Definition: “Vocabulary Binding is the mechanism of identifying specific codes to be used to express the semantics of coded model elements in HL7 information models or coded data type properties.” 19© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Binding 20© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Value Set Core Principles Definition: “A Value Set represents a uniquely identifiable set of valid concept identifiers, where any concept identifier in a coded element can be tested to determine whether it is a member of the Value Set at a specific point in time.” 21© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 Value Set 22© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 VML HL7 employs Vocabulary Maintenance Language (VML) to structure changes to the vocabulary elements. 23© Copyright 2011, Mayo Clinic2011/05/17

HL7 Vocabulary Structures in CTS 2 VML 24© Copyright 2011, Mayo Clinic2011/05/17

Submission Resources CTS 2 Submission Wiki – HL7 CTS 2 SFM (DSTU) – 2_DSTU_2009OCT.pdf 2_DSTU_2009OCT.pdf OMG RFP for CTS 2 – CTS 2 Submission Team – Harold Solbrig – Kevin Peterson – Russ Hamm – Rick Kiefer – Craig Stancl 25© Copyright 2011, Mayo Clinic 2011/05/17