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

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10 | SNOMED CT Release Format 1 (RF1) Guide July 2012 SNOMED CT Affiliate Licence. Details of the SNOMED CT Affiliate Licence may be found at www.ihtsdo.org/licensing/. No part of this document may be reproduced or transmitted in any form or by any means, or stored in any kind of retrieval system, except by an Affiliate of the IHTSDO in accordance with the SNOMED CT Affiliate Licence. Any modification of this document (including without limitation the removal or modification of this notice) is prohibited without the express written permission of the IHTSDO. Any copy of this document that is not obtained directly from the IHTSDO (or a Member of the IHTSDO) is not controlled by the IHTSDO, and may have been modified and may be out of date. Any recipient of this document who has received it by other means is encouraged to obtain a copy directly from the IHTSDO, or a Member of the IHTSDO. (Details of the Members of the IHTSDO may be found at www.ihtsdo.org/members/). © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
Chapter 2 Structure and Content Guide This part of the guide covers the features of SNOMED CT that need to be understood by those implementing SNOMED CT in software applications. These features include the components, derivatives and supporting materials that are distributed as part of each SNOMED CT Release. In addition, the guide addresses the ways in which these components may be referenced to represent instances of clinical information in clinical records and other types of instance data. 2.1. SNOMED CT Technical Overview This section provides an overview of the components and derivatives that form part of a SNOMED CT release as well as several other topics that relate to the use of SNOMED CT to represent instances of clinical information. These topics are explored in more depth by other sections in this part of the guide: • Logical Abstract Models (2.2); • Representational Forms (2.3). More detailed information about technical design and content is provided in other parts of the guide: • Release File Specifications; • Concept Model Guide. 2.1.1. Components This section summarizes the essential components of SNOMED CT (concepts, descriptions and relationships). A SNOMED CT enabled implementation must be able to process and make appropriate use of these components, which are distributed as a set of Release Files. 2.1.1.1. Concepts A SNOMED CT Concept is a clinical idea to which a unique SNOMED CT identifier has been assigned. Each Concept is associated with: • A unique human-readable Fully Specified Name (FSN), which specifies the meaning represented by the Concept. • A set of other Descriptions, each of which represents the same Concept using a different human-readable term. These Descriptions support alternative representations such as synonyms and translations into different languages. • A set of Relationships to other Concepts which provide a logical definition of the Concept that can be processed by a computer. © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434 Structure and Content Guide | 11
Page 1 and 2: SNOMED CT ® Release Format 1 (RF1)
Page 3 and 4: Contents | 3 Release Format 1 - Det
Page 5 and 6: Chapter 1 Preface The purpose of th
Page 7 and 8: Table 3: Document Types Type Name a
Page 9: IHTSDO Glossary (DRAFT) • On line
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
Page 53 and 54: 2.2.2.3.1. Close-to-user expression
Page 55 and 56: It is important to note that combin
Page 57 and 58: 2.2.2.3.6.1. Example of equivalent
Page 59 and 60: 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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