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

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288 | SNOMED CT Release Format 1 (RF1) Guide July 2012 Table 229: RF1 fields that are not use in RF2 File Concept Concept Concept Relationship Field CTV3Id SNOMEDID FullySpecifiedName Refinability 3.3.4.16. Identifier file Rationale for change To avoid cluttering the concept table. To avoid cluttering the concept table. This field duplicates one of the fully specified names represented in the Description file.This duplication has led to misunderstanding of the use of fully specified names in multi-lingual distributions of SNOMED CT. As this information is only useful in some environments, it has been moved out of the Relationship file to avoid cluttering it. Moved to Moved to the | CTV3 simple map| Reference Set. Moved to the | SNOMED RT IDsimple map| Reference Set. The original FSN, which may be required for translation purposes, can be identified as the FSN for the concept that has the earliest effectiveTime. Moved to the | Relationship refinability reference set |. The Identifier file has been added to provide a standardized means of attaching co-referent Identifiers from many different schemes to SNOMED CT components. This provides a means to: • link UUIDs and SCTIDs, and; • add external Identifiers such as LOINC codes, where these are truly co-referent; and; • track history and organizational responsibility by linking old SCTIDs to new ones, where components are transferred from one name space to another, in order to allow uninterrupted use of the old SCTIDs. This provides a mechanism for generically binding SNOMED CT components to an arbitrary number of alternative Identifiers. It is a more scalable solution than appending columns as needed to the Concept file. Note that the Identifier file is not intended as a mapping solution. This structure is only intended to support cases where the external Identifier means exactly the same thing as the SNOMED CT component to which it is attached. For example, it is not envisioned that ICD-9, ICD-10 or CTV3 codes would be entered into this file. The Identifier file is intended to provide a mechanism to represent external codes for SNOMED CT components where the meaning is exactly the same. For example, in the Australian Medicines terminology (AMT), concepts are "generated" from data sourced from the Therapeutic Goods Administration (TGA) and the TGA has an ARTGID for every therapeutic item. This mechanism allows the ARTGIDs to be attached directly to the corresponding AMT concept when generated. In this instance, the Identifier file assists meeting the use case without burdening the descriptions file or concepts file with this content. 3.3.4.17. References table In the previous Release Format, the References Table contained References from inactive components to other equivalent or related components that were current in the Release Version in which that component © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
was inactivated. Each Reference indicated the nature of the relationship between the inactive and persistent component. In RF2, this information will be held in a number of Association reference sets (see the "History Tables" section in this guide and the "SNOMED CT Release Format 2 - Reference Set Specifications" document for more detail). 3.3.4.18. Textual Descriptions In the previous Release Format, a separate Textual Descriptions file held long descriptions (of up to 512 bytes, in plain text format). In RF2, these textual descriptions are transferred to the Description file. 3.3.4.19. Mapping 3.3.4.19.1. Mapping Overview No bespoke mapping file structures (for example, CrossMapSets tables) have been defined in RF2. Instead, the simple map Reference Set pattern and alternate map Reference Set pattern should be used, in conjunction with other Reference Set patterns, to define Reference Sets for mapping purposes. See the "SNOMED CT Release Format 2 - Reference Set Specifications" document for more details. 3.3.4.19.2. Representing RF1 cross maps in RF2 RF1 cross maps that have a type of either one-to-one or one-to-many can be represented in RF2 as described below. The type of an RF1 cross map can be identified from the MapSetType field in the CrossMapSets table. The following values in the MapSetType field are possible: Table 230: RF2 Cross Mapping Type Representations Value 1 2 3 4 Meaning One-to-one One-to-many Alternate on-to-one maps Alternate one-to-many Examples ICD-O ICD-9-CM None known of None known of Mapped to RF2 Can be mapped automatically, as described below Can be mapped automatically, as described below Can be mapped automatically. Further definition will be given if necessary. May need manual intervention to map. For cross maps that have a MapSetType of either '1' or '2', first, create a concept under the |Complex map| sub-hierarchy to describe the Complex map Reference Set, in the following location: SNOMED CT Model component Foundation metadata concept Reference Set Complex map MapSetRealmId Formats | 289 Where MapSetRealmId is set to the contents of the MapSetRealmId field in the CrossMapsSets record of the cross map to be represented in RF2 format. Where the MapSetRealmId field is blank or null, then an © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
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SNOMED CT ® Release Format 1 (RF1)
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Contents | 3 Release Format 1 - Det
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Chapter 1 Preface The purpose of th
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Table 3: Document Types Type Name a
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IHTSDO Glossary (DRAFT) • On line
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Chapter 2 Structure and Content Gui
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Figure 1: Multiple levels of granul
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Table 5: Example: Defining arthriti
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The full definitions of the concept
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Other components (i.e. Relationship
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2.1.2.2.1.3. Linking related Concep
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• Local content requirements that
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Consistent representation is a prer
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Figure 8: Abstract logical model of
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1. As originally stated: : • | Ha
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2.2.1.3.2.3.1. Supertype aspects of
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Figure 11: Example hierarchy with l
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Concept E F G H J K L M Note: Compr
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Concept M List of proximal primitiv
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Table 11: Non-redundant attribute v
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G. | Severe upper limb laceration |
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As a result of this limitation some
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2.2.1.4.3. Historical relationships
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2.2.2.1.1.2. Refinement attribute n
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2.2.2.1.4.3. Use of "unapproved att
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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
Page 237 and 238: CONCEPTID 417163006 417746004 12820
Page 267 and 268: 3.2.13. Enumerated values Value 0 1
Page 269 and 270: Table and Field Subsets SubsetType
Page 271 and 272: 3.3. Release Format 2 Update Guide
Page 273 and 274: • The Release Format should minim
Page 275 and 276: 3.3.3.4. Backward compatibility The
Page 277 and 278: 3.3.4.5. Field Ordering Records in
Page 279 and 280: externalised structures such as Ref
Page 281 and 282: ContextId If either the RealmId fie
Page 283 and 284: eplaced by more descriptive ones if
Page 285 and 286: descriptions associated with concep
Page 287: Figure 45: Illustration of module d
Page 291 and 292: Finally, add members to the Referen
Page 293 and 294: 3.4.1. File Naming Convention - Ove
Page 295 and 296: • Test/Beta Release File("xsct",
Page 297 and 298: In certain cases, an RF1 data file
Page 299 and 300: VersionDate refers to the official,
Page 301 and 302: Example: Excluding the Fully Specif
Page 303 and 304: 4.2.1.3. Pre-processing of distribu
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Page 317 and 318: 4.4.1.4.1. Avoiding multiple hits o
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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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