extension namespace identifier

A seven digit number allocated by SNOMED International to an organization that is permitted to maintain a SNOMED CT Extension.

Notes

• The namespace identifier enables an authorized organization to generate a unique SNOMED CT identifier (SCTID) for each of their SNOMED CT components. It forms part of the SCTID assigned to every component created by that organization.

• Short format SCTIDs, which are used for components that originate from SNOMED International, do not include a namespace identifier. For these SCTIDs the partition identifier provides sufficient information about the origin of the component.

Alternatives

• Namespace identifier

• NamespaceId

This is an abbreviation for expression constraint language.

The SNOMED CT computable language used to represent expression constraints.

• ECL

edition

This is an abbreviation for SNOMED CT edition.

SNOMED CT edition

A complete set of SNOMED CT components and reference set members that either belong to an identified SNOMED CT module or belong to one of the modules on which that module depends.

Notes

• The module used to define the scope of an edition is referred as the focus module of that edition.

• All SNOMED CT editions (except the International Edition) are a combination of one or more extension modules, together with the modules from the SNOMED CT International Edition.

• A complete SNOMED CT edition may be prepared and released by SNOMED International or by the provider of a SNOMED CT Extension. Alternatively, a SNOMED CT edition may be derived from one or more release packages, by combining the contents of an identified focus module with the contents of the relevant version of all modules on which the focus module depends.

• The dependencies between modules are represented using the .

• A SNOMED CT edition can be identified using a Uniform Resource Identifier (URI) as specified by the URI Standard (2.1 URIs for Editions and Versions).

• The SNOMED CT International Edition consists of the focus module , | SNOMED CT core module| , and the module on which it depends, | SNOMED CT model component module| .

• The US National Edition (including the US SNOMED to ICD-10-CM maps) consists of the focus module , , and the three modules on which this depends, , and .

• Edition

This is a synonym for SNOMED CT author.

A person responsible for creating or editing SNOMED CT concepts, concept definitions, and descriptions.

• Author

• Editor

This is a synonym for SNOMED CT expression constraint.

A computable rule that is used to define a set of clinical meanings.

• SNOMED CT expression constraints are defined using the expression constraint language (ECL).

• Expression constraints can be used for a variety of purposes including:

enabled application

This is an abbreviation for SNOMED CT enabled application.

SNOMED CT enabled application

A software application designed to support the use of SNOMED CT.

Alternatives

• Enabled application

• SNOMED CT application

Provide Feedback

expression constraint language

The SNOMED CT computable language used to represent expression constraints.

Notes

Alternatives

• ECL

Provide Feedback

Provide Feedback

expression

This is an abbreviation for SNOMED CT expression.

SNOMED CT expression

A structured combination of one or more concept identifiers that represents an idea.

Notes

• An expression containing a single concept identifier is referred to as a precoordinated expression. An expression that contains two or more concept identifiers is a postcoordinated expression.

• The syntax used to represent SNOMED CT expressions is called the SNOMED CT compositional grammar and is formally defined in the Compositional Grammar - Specification and Guide.

• The concept identifiers in a postcoordinated expression are related to one another in accordance with rules expressed in the SNOMED CT Concept Model. These rules allow an expression to refine the meaning of a concept by applying more specific values to particular attributes of a more general concept.

• The expression 284196006:363698007=770850006 represents a burn to the skin of the left index finger.

• An expression can also include the terms related to each of the identified concepts as shown below:

: =

• Expression

European Committee for Standardization

A standards organization whose mission is to foster the economy of the European Union in global trading, the welfare of European citizens, and the environment.

Notes

• The European Committee for Standardization is a major provider of European standards and technical specifications.

Alternatives

• CEN

• Comité Européen de Normalisation

• Europäiches Komitee für Normung

• CEN TC251 - Health informatics

EHR

This is an abbreviation for electronic health record.

electronic health record

A systematic collection of health information about individual patients or populations that is stored in digital form.

Notes

• An Electronic health record may contain a complete and detailed record of a patient's health or may consist of a summary of information of particular relevance to continuing delivery of care.

Alternatives

• EHR

extended edition

A SNOMED CT edition to which a specified set of additional modules has been added.

Notes

• An extended edition provides a way to add a set of modules containing maps, subsets and other derivatives to an edition.

• The module dependencies of all the additional modules must be satisfied by other modules in the extended edition.

• Additional modules included in an extended versioned edition may include additional reference sets and reference set members and metadata concepts (with descriptions and a subtype relationship linking them to the appropriate branch of the | SNOMED CT Model Component| hierarchy). However, they should not include other concepts, descriptions, relationships or OWL reference set members.

• The SNOMED CT International Edition with both the | International Health Terminology Standards Development Organisation general dentistry diagnostic module| and the | International Health Terminology Standards Development Organisation odontogram module| .

• The SNOMED CT Spanish Edition with the .

This is an abbreviation for SNOMED CT extension.

A set of terminology components and reference set members that add to and are dependent on the SNOMED CT International Edition.

• An extension is created, structured, maintained, and distributed in accordance with SNOMED CT specifications and guidelines.

• An extension consists of one or more modules. All components and reference set members maintained in an extension include a module identifier that assigns them to a module in that extension.

A versioned edition to which specified versions of additional modules have been added.

• An extended versioned edition provides a way to add a set of modules containing maps, subsets and other derivatives to a versioned edition.

• An extended versioned edition is only valid if the module dependencies of all the additional modules are satisfied by other modules in that extended versioned edition.

This is an abbreviation for semantic equivalence.

The relationship between two classes that have the same logical meaning.

• The equivalent classes may be represented in different ways for example as SNOMED CT concept definitions, SNOMED CT expressions, or axioms expressed using a syntax such as OWL Functional Syntax.

• Semantic equivalence is represented by the Ξ symbol or by a sequence of three equals signs === .

The part of a SNOMED CT expression that applies qualifying details to a focus concept.

• A spiral fracture of the shaft of humerus can be represented by an expression in which the concept fracture of humerus is made more specific by the addition of a refinements containing attributes that more precisely indicate the location and morphology.

: ⬅︎ Focus concept { = , ⬅︎ Refinement = } ⬅︎ ...

This is a synonym for SNOMED CT expression constraint template.

A SNOMED CT expression constraint containing template slots that can be populated by specific values when in use.

• An expression constraint template is particularly useful when non-technical users need to create structured constraints or queries. A technically competent designer creates the template and users enter values in the template slots. A form-driven query tool may also be used to create structured constraints or queries.

A term that includes or is derived from the name of a person or place.

• The eponym is typical the name of a person who invented, discovered or created the original description of the concept to which the eponymous term applies.

• SNOMED CT Editorial Guidelines encourage inclusion of eponymous terms as synonyms but deprecate their use in fully specified names.

A subset in which the members are represented by enumeration.

• An extensional subset definition of SNOMED CT components may be represented by a list of the identifiers of the components.

• The standard format for distributing an extensionally defined subset of SNOMED CT components is a simple reference set.

A systematic collection of health information about individual patients or populations that is stored in digital form.

• An Electronic health record may contain a complete and detailed record of a patient's health or may consist of a summary of information of particular relevance to continuing delivery of care.

• EHR

entire

This is part of structure-entire-part.

structure-entire-part

A modeling approach used in SNOMED CT to represent anatomical entities such as body organs, systems, or regions.

Notes

• Structure is the most general way to refer to an organ, body system, or region.

• Entire refers to a complete organ, body system, or region.

• Part refers to a part of an organ, body system, or region. Part does not refer to the entire organ, body system, or region.

Figure 1 below illustrates the relationships between the structure , entire , and part concepts applied to the heart.

• SEP

enabled implementation

This is an abbreviation for SNOMED CT enabled implementation.

SNOMED CT enabled implementation

An implementation of an information system that is able to make effective use of SNOMED CT in an organization or region.

Notes

• SNOMED CT enabled implementation has a broader meaning than SNOMED CT enabled application. An implementation involves practical deployment of one or more applications to address personnel and organizational issues that allow the potential benefits to be realized.

Alternatives

• Enabled implementation

• SNOMED CT implementation

This is a synonym for SNOMED CT expression template.

A SNOMED CT template that represents an expression in which one or more elements are replaced by SNOMED CT template slots.

• An expression template includes one or more predefined variables which when replaced by appropriate values creates a conformant expression.

• An expression template can be used to specify how data items entered via several controls in a structured user interface should be combined to represent a composite meaning.

eponym

This is an abbreviation for eponymous term.

eponymous term

A term that includes or is derived from the name of a person or place.

Notes

• The eponym is typical the name of a person who invented, discovered or created the original description of the concept to which the eponymous term applies.

• SNOMED CT Editorial Guidelines encourage inclusion of eponymous terms as synonyms but deprecate their use in fully specified names.

Examples

• Down syndrome

• Moro reflex

• Whipple procedure

• Eponym

explicit context

This is an abbreviation for [situation with explicit context](https://confluence.ihtsdotools.org/display/DOCGLOSS/situation with explicit context "Glossary link: situation with explicit context").

situation with explicit context

A concept that specifically defines the context of a clinical finding or procedure.

Notes

• A situation with explicit context is defined as a subtype of the situation to which it applies with an attribute associating it with the relevant clinical finding or procedure.

Example

• Family history of diabetes mellitus is a situation with explicit context concept. It defines the context as family history by indicating that the is a .

• In contrast, diabetes mellitus itself is not a situation with explicit context. It can be used in many different situations including family history , past medical history or current diagnosis.

• Clinical situation

• Context

• Explicit context

A subset whose membership is defined by an extensional subset definition.

An extensional subset definition is defined as

• A subset in which the members are represented by enumeration.

• An extensional subset definition of SNOMED CT components may be represented by a list of the identifiers of the components.

A European Standard developed by CEN TC251 that defines a rigorous and stable information architecture for communicating all or part of an electronic health record (EHR) of a patient.

• EN13606 supports the interoperability of systems and components that communicate (access, transfer, add, or modify) EHR data via electronic messages or as distributed objects while: * preserving the clinical meaning * maintaining the confidentiality of the patient's data.