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A software function that interfaces with and provides access to information from one or more representations of a terminology.
Terminology services __ enable a wide range of different electronic health record applications to access key features of SNOMED CT.
Different applications can interact with a terminology service to support a range of application specific record services including data entry, storage, retrieval, display and analysis.
A concept that is directly related to the root concept by a subtype relationship.
All other concepts are subtype descendants of at least one top level concept.
The list below shows the top level concept in the 2019-01-31 SNOMED CT International Release.
138875005 |SNOMED CT Concept| ⬅︎ The root concept 123037004 |Body structure| 404684003 |Clinical finding| 308916002 |Environment or geographical location| 272379006 |Event| 363787002 |Observable entity| 410607006 |Organism| 373873005 |Pharmaceutical / biologic product| 78621006 |Physical force| 260787004 |Physical object| 71388002 |Procedure| 362981000 |Qualifier value| 419891008 |Record artifact| 243796009 |Situation with explicit context| 48176007 |Social context|
A narrative text explanation of the meaning of a concept that may exceed the maximum permitted length for a fully specified name.
Textual definitions are optional and are only provided for a limited number of concepts, where there is a requirement additional detail.
Textual definitions are distributed as descriptions with a description type .
A file that conforms to the standard description file format is used to distribute textual definitions
A link between a terminology component and an information model artifact.
Terminology components include SNOMED CT concepts, expressions, reference sets, and constraints.
Information model artifacts include classes and attributes in reference models for electronic health records and communication specifications.
Terminology bindings enables formal specification of rules for:
One use of textual definitions is to indicate alignment of a SNOMED CT concept with a specific clinical definition of a condition.
For example has the following textual definition:
consistent use of SNOMED CT in an information model; and
transforming data to a shared model of meaning.
There are two distinct types of terminology binding
A value set binding is a terminology binding that represents the set of permitted values that can be used to populate a coded data item.
A meaning binding is a terminology binding that represents the clinical meaning of a data item or collection of data items.
Terminology binding can also refer to the process of creating and maintaining links between terminology components and information model artifacts.
A set of coded values that may be applied to a particular attribute in an information model. The set may be expressed extensionally (by enumeration of the codes) or intensionally (by rules such as expression constraints).
The association between a named attribute value in the information model and a specific coded value or expression.
A rule that determines the way that a coded expression is constructed, based on multiple attribute values in the information model.
Software that provides access to one or more terminologies, classifications or code systems through a defined application programming interface (API).
Each API call provides a defined terminology service, such a finding code of concept matching a set of search criteria.
A terminology, coding scheme, or classification to which some or all SNOMED CT concepts are mapped.
ICD-10 is the target scheme for the SNOMED CT to ICD-10 map.
The process of rendering text from a source language into a target language.
English is the source language for the International Edition of SNOMED CT.
This is a synonym for other-code.
A code or identifier in a code system, classification, or terminology other than SNOMED CT.
Not to be confused with:
The hyphenated form other-code (or other-codes) is used to avoid confusion with the more general reference to another code.
This is an abbreviation for SNOMED CT template slot.
A marked position in a SNOMED CT template that can be removed or replaced an with appropriate values during processing.
There are two main types of template slots:
Replacement Slots , which are replaced by a SNOMED CT concept, expression or string during template processing
Information Slots , which provide metadata about how the template is to be processed.
Superseded by - Alpha release package.
A SNOMED CT release package made available only for initial review and testing by implementers and other stakeholders.
An alpha release package must not be used in production clinical systems or in clinical settings. This includes Affiliate Licensees or any third parties, except those who have formally committed to test it.
An alpha release is used to test the format and content of the SNOMED CT release. Feedback is elicited and changes are made prior to publication of the beta release.
Alpha releases were formerly known as a technology preview releases.
Alpha package
Alpha release
This is an abbreviation for normal form transformation.
Refers to the process of generating a normal form normal form.
A SNOMED CT expression in which none of the referenced concepts are fully defined and where there is no redundancy or duplication of meaning.
In theory, an expression can be transformed to its normal form by replacing each reference to a fully defined concept with a nested expression that represents the definition of that concept. However, this process often results in redundancy or duplication of meaning requiring removal of less specific attribute values and mergers of attribute groups. Therefore, use of description logic classifier is more effective way to normalize and compare expressions.
Prior to the July 2019 International Edition, two normal form expressions could be compared to determine whether they were logically equivalent equivalence or whether one expression was subsumed by the other. The July 2019 release included enhancements to the description logic used by SNOMED CT. As a result of these enhancements, expression transformation is no longer a reliable option for subsumption testing. Instead, postcoordinated expressions should be classified using a description logic classifier to determine subsumption.
This is a synonym for SNOMED CT browser.
A software application that provides a user interface through which to explore SNOMED CT content.
A typical SNOMED CT browser can locate concepts and descriptions by identifiers and by searching the text of description terms.
Various views of located concepts may be displayed including the set of related descriptions, the hierarchical relationships and other defining relationships.
Browser
Terminology browser
A concept that is directly related to the SNOMED CT model component concept by a subtype relationship .
The SNOMED CT model component concept is .
All metadata concepts are subtype descendants of at least one top level metadata concept.
The top level of the metadata hierarchy represents broad groups of metadata as follows:
A language into which the original text is translated or rendered.
Spanish is the target language for the SNOMED CT Spanish Edition.
Target language
A comprehensive view of all the supertype ancestors of a concept.
The view is derived by traversing all of the 116680003 | is a| relationships between that concept and the root concept.
A transitive closure table represents the transitive closure of the 116680003 | is a| relationships of all active concepts and facilitates efficient subsumption testing.
This is a synonym for normal form transformation.
Refers to the process of generating a normal form normal form.
A SNOMED CT expression in which none of the referenced concepts are fully defined and where there is no redundancy or duplication of meaning.
In theory, an expression can be transformed to its normal form by replacing each reference to a fully defined concept with a nested expression that represents the definition of that concept. However, this process often results in redundancy or duplication of meaning requiring removal of less specific attribute values and mergers of attribute groups. Therefore, use of description logic classifier is more effective way to normalize and compare expressions.
Prior to the July 2019 International Edition, two normal form expressions could be compared to determine whether they were logically equivalent equivalence or whether one expression was subsumed by the other. The July 2019 release included enhancements to the description logic used by SNOMED CT. As a result of these enhancements, expression transformation is no longer a reliable option for subsumption testing. Instead, postcoordinated expressions should be classified using a description logic classifier to determine subsumption.
The language in which the original text is written.
English is the source language for the International Edition of SNOMED CT.
Source language
This is an abbreviation for translation service provider.
Person or organization supplying translation services.
TSP
This is an abbreviation for HL7 TermInfo.
An HL7 project that developed the "HL7 Version 3 Implementation Guide: Using SNOMED CT in HL7 Version 3" as a Draft Standard for Trial Use (DSTU).
The guide is an the HL7 Version 3 draft standard for achieving semantic interoperability to communicate clinical information represented by SNOMED CT concepts.
TermInfo
This is an abbreviation for SNOMED CT template.
A SNOMED CT expression, expression constraint, or query containing one or more SNOMED CT template slots to be populated with values prior to or during processing.