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

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276 | SNOMED CT Release Format 1 (RF1) Guide July 2012 3.3.4.3. History tables History tracking in RF2's main files uses a log-style, append-only data model. Therefore, the separate ComponentHistory file that formed part of the original Release Format is no longer required with RF2. The associations between inactive and active Concepts that are currently supported by Historical Relationship types (e.g. | SAME AS |, "REPLACED BY) will continue to be supported. References held in the References table from an inactive component to other equivalent or related components that were current in the Release Version in which that component was inactivated will also continue to be supported.However, both of these associations have now moved from the Relationships file and the References file to one of the following |Historical association| reference sets. Table 218: RF1 to RF2 History Field Mappings RF1 source MAYBE A (in Relationships table) Refers to ('7' in References table) Similar to ('3' in References table) MOVED FROM (in Relationships table) Moved from ('6' in References table) MOVED TO (in Relationships table) Moved to ('5' in References table) Alternative ('4' in References table) WAS A (in Relationships table) REPLACED BY (in Relationships table); and Replaced by ('1' in References table) SAME AS (in Relationships table) Duplicated by ('2' in References table) RF2 |Historical association| reference set |POSSIBLY EQUIVALENT TO association reference set | |REFERS TO concept association reference set | |SIMILAR TO association reference set | |MOVED FROM association reference set | |MOVED TO association reference set | |ALTERNATIVE association reference set | |WAS A association reference set | |REPLACED BY association reference set | |SAME AS association reference set | These reference sets all conform to the Association reference set pattern, and are further described in the "SNOMED CT Release Format 2 - Reference Set Specifications" document. 3.3.4.4. Field naming Lower camel case has been used for field names in distribution file headers and in documentation that describes these files. File names will use upper camel case (starting with a capital letter). File names have also been altered to use a singular not plural form. An example of upper Camel Case is ThisIsUpperCamelCase. An example of Lower Camel Case is thisIsLowerCamelCase. © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
3.3.4.5. Field Ordering Records in the Concept, Description, Relationship and Reference Set member files each start with the following four fields: • id; • effectiveTime • active • moduleId The four fields have the following meanings: • The id field provides a unique Identifier for the component described by the record; • The effectiveTimegives the nominal release date at which this version of the component came into effect; • The active flag states whether the components active or inactive; • The moduleId identifies the source module in which the component is maintained. The Identifier file does not follow the same format, as it works in a slightly different way to the other files, and is described in more detail in the "SNOMED CT Release Format 2 - Data Structures Specification" document. 3.3.4.6. Concept enumerations Concept enumerations have been used across RF2 to replace integer enumerations that can only be understood by referencing external documentation. For example, in RF1, a concept status value of '4' indicates concepts that are inactive because they are ambiguous. In RF2, concept enumeration simply uses concepts in a metadata hierarchy to represent the enumerated value set rather than using arbitrary integer values directly. Using concepts to represent the enumerated values has the following advantages: • The terminology is self contained, removing the requirement for external documents to explain the meaning of enumerated values; • Full language handling capabilities are available for the enumerated values' representation, useful for standardized multi-lingual representation, and translation support; • Machine readable model constructs can be used to further describe and enrich the enumerated values. The following fields have been converted to concept enumerations: Table 219: RF1 to RF2 enumerated field changes File Concept Description Description Relationship Existing RF1 field name IsPrimitive DescriptionType InitialCapitalStatus CharacteristicType RF2 field name definitionStateId typeId caseSignificanceId characteristicTypeId Care should be taken not to confuse Concept Enumerations with the term "enumeration" as used in representational formats. A Concept Enumeration is a concept whose immediate children represent possible values in a range. Each possible value is represented by a single child concept, whose preferred term may be used, for example, to enable selection from a pick-list of one or more values from the range. Mappings from RF1 values to RF2 concept enumerations are given below: Formats | 277 © 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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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
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Page 279 and 280: externalised structures such as Ref
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Page 317 and 318: 4.4.1.4.1. Avoiding multiple hits o
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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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