SNOMED CT® Release Format 1 (RF1) Guide - ihtsdo

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2 | SNOMED CT Release Format 1 (RF1) Guide July 2012 Contents Chapter 1: Preface...............................................................................5 Where is the Glossary?............................................................................................................5 Document Properties...............................................................................................................6 Amendment History .................................................................................................................6 Status.......................................................................................................................................6 Additional information...............................................................................................................7 Inventory of Documentation.....................................................................................................8 Copyright Notice.......................................................................................................................9 Chapter 2: Structure and Content Guide.........................................11 SNOMED CT Technical Overview..........................................................................................11 Components................................................................................................................11 Derivatives...................................................................................................................19 Extensions...................................................................................................................22 Instance data...............................................................................................................24 Logical Abstract Models.........................................................................................................26 Logical Model of SNOMED CT Components..............................................................26 Logical Model of SNOMED CT expressions................................................................45 Representational Forms.........................................................................................................61 Release Files...............................................................................................................61 Representing SNOMED CT identifiers........................................................................61 Representing Extensions.............................................................................................68 Representational Forms for Expressions.....................................................................76 Stated Relationships Guide.........................................................................................84 Other Representational Forms....................................................................................89 Additional Reference Materials....................................................................................90 Chapter 3: Release File Formats....................................................102 RF1 Compatibility and Conversion Tools..............................................................................102 Release Format 1.................................................................................................................103 Release Format 1 - Overview....................................................................................104 Release Format 1 - Structure diagram......................................................................105 Core Table Structure..................................................................................................105 Subset Mechanism....................................................................................................110 Navigation hierarchies...............................................................................................115 Cross-Mapping..........................................................................................................116 Content History..........................................................................................................122 Distribution Files .......................................................................................................138 © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
Contents | 3 Release Format 1 - Detailed specification.................................................................139 The Stated relationships tables.................................................................................215 Cross Mappings Guide..............................................................................................215 Text Definitions..........................................................................................................231 Enumerated values....................................................................................................267 Release Format 2 Update Guide..........................................................................................271 Introduction................................................................................................................271 Principles used in the design of RF2.........................................................................272 Rationale for moving from RF1 to RF2......................................................................273 Details of Key Changes.............................................................................................275 SNOMED CT - File Naming Conventions.............................................................................292 File Naming Convention - Overview..........................................................................293 FileType element.......................................................................................................293 ContentType element.................................................................................................295 ContentSubType element..........................................................................................296 Country|Namespace element....................................................................................298 VersionDate element.................................................................................................298 Extension element.....................................................................................................299 Chapter 4: Terminology services Guide (RF1)..............................300 Representing SNOMED CT in an application......................................................................300 Direct use of release files in a relational database....................................................300 Alternative relational structure...................................................................................300 Non-relational structures...........................................................................................301 Importing and updating from Release Files.........................................................................302 Importing distribution files..........................................................................................302 Importing new releases and updates.........................................................................303 Importing Extensions.................................................................................................304 Providing access to history information.....................................................................305 Foundation Terminology services.........................................................................................305 Access to release information...................................................................................306 Access to components..............................................................................................306 Access to essential concept Identifiers......................................................................306 User Interface Terminology services....................................................................................308 Text Searches............................................................................................................308 Hierarchical Navigation..............................................................................................317 Applying Subsets.......................................................................................................332 Access to qualifiers and refinable characteristics......................................................342 Testing and traversing subtype Relationships......................................................................343 Top-level ancestor checking......................................................................................343 Navigation concept checking.....................................................................................343 Subtype descendant testing......................................................................................343 Subtype search scope restriction..............................................................................343 Optimizing concept subsumption testing...................................................................343 © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
Page 1: SNOMED CT ® Release Format 1 (RF1)
Page 5 and 6: Chapter 1 Preface The purpose of th
Page 7 and 8: Table 3: Document Types Type Name a
Page 9 and 10: IHTSDO Glossary (DRAFT) • On line
Page 11 and 12: Chapter 2 Structure and Content Gui
Page 13 and 14: Figure 1: Multiple levels of granul
Page 15 and 16: Table 5: Example: Defining arthriti
Page 17 and 18: The full definitions of the concept
Page 19 and 20: Other components (i.e. Relationship
Page 21 and 22: 2.1.2.2.1.3. Linking related Concep
Page 23 and 24: • Local content requirements that
Page 25 and 26: Consistent representation is a prer
Page 27 and 28: Figure 8: Abstract logical model of
Page 29 and 30: 1. As originally stated: : • | Ha
Page 31 and 32: 2.2.1.3.2.3.1. Supertype aspects of
Page 33 and 34: Figure 11: Example hierarchy with l
Page 35 and 36: Concept E F G H J K L M Note: Compr
Page 37 and 38: Concept M List of proximal primitiv
Page 39 and 40: Table 11: Non-redundant attribute v
Page 41 and 42: G. | Severe upper limb laceration |
Page 43 and 44: As a result of this limitation some
Page 45 and 46: 2.2.1.4.3. Historical relationships
Page 47 and 48: 2.2.2.1.1.2. Refinement attribute n
Page 49 and 50: 2.2.2.1.4.3. Use of "unapproved att
Page 51 and 52: Interim recommendations 1. Wherever
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2.2.2.3.1. Close-to-user expression
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It is important to note that combin
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2.2.2.3.6.1. Example of equivalent
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Figure 25: Alternative expressions
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Figure 27: Possible expressions of
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Figure 28: SCTID Short Format - App
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PartitionId 05 Description A Cross
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SctId 999999990989121104 2.3.2.9. T
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2.3.3.2. Specification for Namespac
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2.3.3.3.1.4. Procedures 2.3.3.3.1.4
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1. Every Concept in an Extension:
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Table 17: Processing Transfers betw
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In May 2008, the HL7 Version 3 Stan
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An expression supports combinations
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digitNonZero= %x31-39 The first cha
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excision of left fallopian tube. No
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This existential restriction is lab
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• In order to generate the OWL ve
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• Though there are many candidate
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2.3.7.2.2.1. Single byte encoding C
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9 0 9 Table 29: The full array for
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else {document.getElementById("out"
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http://www.augustana.ab.ca/~mohrj/a
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version. It seems unwise to prevent
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Table DescDualKey Table ConcDualKey
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The IHTSDO recognizes that, while i
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3.2.2. Release Format 1 - Structure
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3.2.3.2. Core Tables Data - Structu
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Data Fields InitialCapitalStatus De
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3.2.4.1. Subset Mechanism - Structu
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Data Fields ContextId 3.2.4.2.2. Su
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Subset SNOMED CT Top Level Navigati
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• as a combination of codes; •
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Table 41: Cross Mapping Tables Cros
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Table 44: Cross Map Targets Table K
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The History Mechanism is also used
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In addition, the ReferencedId field
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Table Descriptions Descriptions Rel
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Table 49: Relationships depending o
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Table 51: Changes to Relationships
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Table 52: Changes to Relationships
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• The only Relationships that it
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ComponentId ConceptId ReleaseVersio
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A readme.txt file is distributed wi
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Value 6 10 11 Limited Moved elsewhe
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As new concepts are added to SNOMED
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Table 73: DescriptionStatus Values
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3.2.9.2.2.4. InitialCapitalStatus T
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3.2.9.3. relationships tables Each
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3.2.9.3.2.3. ConceptId2 Table 84: -
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An integer value that expresses an
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3.2.9.4.1.2.4. SubsetType Table 95:
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A string that identifies a Context
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3.2.9.4.2.1.2. Data Fields Table 10
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• MemberStatus 3.2.9.4.2.3.1.1. S
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3.2.9.4.2.4.1.3. MemberStatus Table
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3.2.9.4.2.5.2. Data Fields Table 11
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3.2.9.4.2.7.1.1. SubsetId Table 124
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3.2.9.4.2.8.1.3. MemberStatus Table
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3.2.9.4.3. Subset Definition File P
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3.2.9.5.1.2.3. MapSetSchemeId Table
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This discussion of rules is include
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3.2.9.5.1.3.2.3. MapRule Table 151:
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3.2.9.5.1.4.2.3. TargetRule Table 1
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RELAT_NMS = column in the LOINC tab
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The value of the SNOMED CT / LOINC
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The SNOMED CT Relationships Table e
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LOINC Analyte Name(s) DESMETHYLAMIO
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LOINC Analyte Name(s) COMPLEMENT IC
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The information provided includes d
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3.2.9.6.4.1.2. ReleaseVersion Table
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Value 6 7 8 9 10 11 Note: Name Limi
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3.2.9.6.5.1.1. ComponentId Table 17
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Release Format 1 is represents a sn
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RF1 Descriptions Table Descriptions
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Table 177: Concepts Table Use of re
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Use of recommended additional indic
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Use of recommended additional indic
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Table 184: Cross Map Sets Table Use
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Keys Partition Size Type Field Name
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Table 192: Word Equivalents Table U
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3.2.10. The Stated relationships ta
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Figure 41: Overview of Cross Map Sc
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Table 197: Cross Maps Sets Table Ma
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Table 201: Cross Maps Sets Table Ma
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Table 205: Cross Map Sets Table Map
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If this approach is followed, there
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This approach allows a more consist
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1. A record may contain many record
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• Temporally related to the selec
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CONCEPTID 95333004 7119001 95336007
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CONCEPTID 109778006 109788007 15270
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CONCEPTID 417163006 417746004 12820
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CONCEPTID 102706005 1677001 9145400
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CONCEPTID 399023006 399154007 39905
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CONCEPTID 399306005 399239005 39937
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CONCEPTID 125086000 78678003 388393
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CONCEPTID 339008 47002008 128419007
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CONCEPTID 16817006 15367004 1580700
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CONCEPTID 14509009 39250009 8627300
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CONCEPTID 122868007 122465003 78817
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CONCEPTID 19207007 74923002 6639100
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CONCEPTID 54305003 84100007 3216600
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CONCEPTID 255496004 255499006 24646
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CONCEPTID 62834003 5668004 34810001
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CONCEPTID 53224005 4150005 74636004
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CONCEPTID 47538007 19359003 3011000
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3.2.13. Enumerated values Value 0 1
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Table and Field Subsets SubsetType
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3.3. Release Format 2 Update Guide
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• The Release Format should minim
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3.3.3.4. Backward compatibility The
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3.3.4.5. Field Ordering Records in
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externalised structures such as Ref
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ContextId If either the RealmId fie
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eplaced by more descriptive ones if
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descriptions associated with concep
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Figure 45: Illustration of module d
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was inactivated. Each Reference ind
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Finally, add members to the Referen
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3.4.1. File Naming Convention - Ove
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• Test/Beta Release File("xsct",
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In certain cases, an RF1 data file
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VersionDate refers to the official,
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Example: Excluding the Fully Specif
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4.2.1.3. Pre-processing of distribu
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• Reject, highlight or apply othe
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Table 236: Essential concept Identi
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The purpose of this section of the
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Table 240: Example results for a Se
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• For each dual key, add rows to
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• Description104951019 is elimina
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4.4.1.4.1. Avoiding multiple hits o
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Table 248: Relationship Example Con
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• Since the depth of the hierarch
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4.4.2.5. Using navigation Subsets t
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Table 253: Concepts used in the Exa
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SubsetId Mem
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• 302402006 | radius and/or ulna
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Now we have tree nodes and their ch
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Subsets may be used to derive table
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• One Subset can be used as the b
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• A Context Concept Subset only r
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• A Navigation Subset specifies a
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• A RealmID identifies the specia
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4.5. Testing and traversing subtype
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This approach removes the need for
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4.5.5.2.4. Using the transitive clo
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Figure 55: Terminology server provi
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A field in the Component History Ta
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Cross maps table A data table consi
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• References Table Inactive compo
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A field in the Cross Maps Table tha
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A Subset that specifies sets of Nav
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A field in the Concepts Table that
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TargetId A SNOMED CT Identifier tha
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WordText A field in the Word Equiva
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