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

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216 | SNOMED CT Release Format 1 (RF1) Guide July 2012 Classification ICD-O Topography International Classification of Diseases for Oncology Geneva, World Health Organization Version Version 2, Version 3 The cross-mapping approach in SNOMED Clinical Terms is based on these general principles. • SNOMED CT concepts always retain their meaning: • SNOMED CT is a concept -based reference terminology where extensive scientific expertise has been utilized to provide a rich work of medical concepts along with their descriptions, synonyms, logical descriptors and relationships to other concepts. Therefore, in developing these mappings, SNOMED CT concepts have retained their meaning and not the meaning suggested by a classification. • Automated mapping is a goal: • The cross mapping scheme is designed to support automated cross mapping (in future releases) by striving for one-to-one mappings when possible and by providing a technical schema that supports rule-based processing. • Implementation Review of mappings is expected: • The mapping files are intended as tools to jumpstart SNOMED CT sites in cross mapping projects. It is expected that each site will review these files and implement cross mapping functions and values specific to their needs. • Some concepts may be part of a SNOMED CT extension file and can be ignored if that extension is not used. These concepts are designed with a 10 in the partition identifier component of the concept ID. 3.2.11.1. Specification of cross-reference schema The SNOMED CT structure for supporting Cross Maps includes three tables specific to the cross map function. The structure of these tables provides tremendous flexibility to support the expression and delivery of several types of cross mappings. The technical structure of these tables is summarized elsewhere in the Technical Reference Guide. © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434
Figure 41: Overview of Cross Map Schema 3.2.11.2. SNOMED CT to ICD-9-CM Epidemiological and Statistical Map ICD-9-CM, the International Classification of Diseases 9th Revision Clinical Modification Version, is a coding scheme sponsored by the National Center for Health Statistics (NCHS). It is used extensively in the United States for reporting and tracking of mortality, statistical reporting of diseases as well as billing and reimbursement processing. The SNOMED CT to ICD-9-CM cross-map is updated to reflect the version of ICD-9-CM current as of the date of its release. It includes all the SNOMED CT Clinical Findings (disorders and findings). Note: It is important to note that this mapping table is NOT intended for direct billing or reimbursement without additional authoritative review. Whenever possible, the ICD code or codes(s) with the highest level of specificity have been selected. Terms that cannot be assigned to appropriate ICD-9-CM code or codes are considered unmappable. They are denoted by a null in the Target Codes field and a zero in the MapAdvice field. 3.2.11.2.1. Mapping Categorization Methodology The MapAdvice field in the Cross Maps table contains the categorization methodology that provides further information about the characteristics of the map. The methodology is as follows: Table 195: Mapping Categorization Methodology Category 0 Description Unmappable. SNOMED CT term cannot be assigned to an appropriate ICD-9-CM code. Formats | 217 © 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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Page 169 and 170: 3.2.9.4.2.8.1.3. MemberStatus Table
Page 171 and 172: 3.2.9.4.3. Subset Definition File P
Page 173 and 174: 3.2.9.5.1.2.3. MapSetSchemeId Table
Page 175 and 176: This discussion of rules is include
Page 177 and 178: 3.2.9.5.1.3.2.3. MapRule Table 151:
Page 179 and 180: 3.2.9.5.1.4.2.3. TargetRule Table 1
Page 181 and 182: RELAT_NMS = column in the LOINC tab
Page 183 and 184: The value of the SNOMED CT / LOINC
Page 185 and 186: The SNOMED CT Relationships Table e
Page 187 and 188: LOINC Analyte Name(s) DESMETHYLAMIO
Page 189 and 190: LOINC Analyte Name(s) COMPLEMENT IC
Page 191 and 192: The information provided includes d
Page 193 and 194: 3.2.9.6.4.1.2. ReleaseVersion Table
Page 195 and 196: Value 6 7 8 9 10 11 Note: Name Limi
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Page 199 and 200: Release Format 1 is represents a sn
Page 201 and 202: RF1 Descriptions Table Descriptions
Page 203 and 204: Table 177: Concepts Table Use of re
Page 205 and 206: Use of recommended additional indic
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Page 211 and 212: Keys Partition Size Type Field Name
Page 213 and 214: Table 192: Word Equivalents Table U
Page 215: 3.2.10. The Stated relationships ta
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Page 225 and 226: If this approach is followed, there
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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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