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

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226 | SNOMED CT Release Format 1 (RF1) Guide July 2012 Concept “A” “A” “A” “A” Option 3.2.11.5.3.3. Branching Model 4 5 6 7 Rule Age >= 60 AND Coexists “B” Age < 60 AND Coexists “C” Age >= 60 AND Coexists “C” TRUE TargetId 103053 104055 105059 101050 TargetCodes The branching approach tests each element of a rule separately and if any test fails it provides a specified reference to the next Cross Map to be tested. If all the tests are true the associated Cross Map Target is used. If any test fails the specified option is tested next. If this approach is followed significant optimization can occur so that any test is only performed once for each Concept mapped. However, one disadvantage is that addition, removal or revision of any Cross Map requires a review of the entire set of Cross Maps for that Concept. Another disadvantage is that branching logic is less transparent than sequential testing. There are greater risks of logical errors requiring debugging of different test cases. Table 210: Example of the Cross Map Branching Model Concept “A” “A” “A” “A” “A” “A” “A” Option 1 2 3 4 5 6 7 MapRule Age < 60 (ELSE 4) AND Coexists “B” (ELSE 3) AND Coexists “C” (ELSE 2) TRUE Coexists “C” (ELSE 7) Coexists “B” (ELSE 6) AND Coexists “C” (ELSE 5) TRUE Coexists “C” (ELSE 7) TRUE 3.2.11.6. Applying rules to Cross Map Targets TargetId 106058 102056 104055 107054 103053 105059 101050 X Y Z V TargetCodes The proposed structures allow rules to be associated with Cross Map Targets instead of Cross Maps. A Cross Map Target may be the target of several Cross Maps. If there are no rules in a Cross Map any rules in the referenced Cross Map Target are tested. © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434 W, Y W Y X, Z X Z V
This approach allows a more consistent representation of the rules that relate to generating a particular mapping. However, since each Cross Map Target is a stand-alone component that may be referenced by Cross Maps associated with several different Concepts the rules must be complete and order independent. The decision on whether to apply the rules to the Cross Maps or the Cross Map Targets depends on the nature of the mapping of SNOMED CT. In cases where there is a clear-cut set of primary Concepts from which mappings are to be generated, it is preferable to reflect this with rules in the Cross Maps for those Concepts. In less clearly defined cases, it may be better to express the rules in the Cross Map Target. Example Extending the illustration in the previous section, Cross Maps from Concept “B” could reference some of the same Cross Map Targets as Concept “A”. However, in the case of the map from Concept “B” the co-existence of condition “A” must be tested rather than “B”. Concept “B” could be mapped to: • “W” if the patient is under aged 60 and has co-existing condition “A” but not “C” ; • “X” if the patient is aged 60 or over and has co-existing condition “A” but not “C” ; • "W, Y" if the patient is under aged 60 and has co-existing conditions “A”and“C” ; • "X, Z" if the patient is aged 60 or over and has co-existing conditions “A”and“C” ; • An additional Target Code “S” if neither of the conditions “A”or“C” is present. Using the sequential approach the Cross Maps for Concept “B” would be as follows: Table 211: Cross Map Rules Concept “B” “B” “B” “B” “B” Note: Option 1 2 3 4 5 Rule Age < 60 AND Coexists “A” AND Coexists “C” Age >= 60 AND Coexists “A” AND Coexists “C” Age < 60 AND Coexists “A” Age >= 60 AND Coexists “A” TRUE TargetId 106058 107054 102056 103053 108057 TargetCodes The first four rows Cross Maps refer to the same four Cross Map Targets that were used in the mapping from Concept “A”. However the rules differ because these are Cross Maps from Concept “B” rather than from Concept “A”. If rules are to be stated for these Cross Map Targets, these must be made complete and order independent so that they are not dependent on the Concept that initiated the mapping. Table 212: Cross Map Target Rules TargetId 101050 TargetCodes V TargetRule W, Y X, Z Coexists “A” AND NOT Coexists “B” AND NOT Coexists “C” © 2002-2012 International Health Terminology Standards Development Organisation CVR #: 30363434 W X S Formats | 227
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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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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 209 and 210: Table 184: Cross Map Sets Table Use
Page 211 and 212: Keys Partition Size Type Field Name
Page 213 and 214: Table 192: Word Equivalents Table U
Page 215 and 216: 3.2.10. The Stated relationships ta
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Page 223 and 224: Table 205: Cross Map Sets Table Map
Page 225: If this approach is followed, there
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Page 231 and 232: • Temporally related to the selec
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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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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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