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A Concept references a defined concept using Coding references a symbol from a defined code system.   It uses a code defined in a terminology system to associate semantics with a given term, codelist, variable, or group of variables. The presence of a Concept Coding element associates a meaning to its parent element. Including multiple Concept Coding elements for a given parent indicates synonymous meanings provided by different code systems or code system versions.

The Code is a string pattern that identifies a concept as defined by the code system.

The System is a URI that identifies the code system that defines the code. If the code is taken from a code system resource then the URL for the code system should be used to represent the System. SystemName is a readable name for the System. SystemVersion identifies the version of the System. 

CommentOID references a unique ID of a CommentDef element that provides the rationale for the use of the Concept.

The Decode child element allows to add a human-readable name for the concept in one or more languages.

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Coding Element
Coding Element

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Coding Attributes
Coding Attributes


Example
titleCoding for ItemDef

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Coding Example - ItemDef
Coding Example - ItemDef

Example
titleCoding for CodeListItem elements, with Decode elements

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Coding Example - Decode
Coding Example - Decode

Example
titleCoding for CodeListItem elements, without Decode elements

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Coding Example - CodeList
Coding Example - CodeList

Example
titleCoding for CodeList elements, reference to external codelist system

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Coding Example - CodeList referencing a complete external codelist system
Coding Example - CodeList referencing a complete external codelist system

Example
titleCoding for CodeList elements, reference to external codelist

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Coding Example - CodeList referencing a complete external codelist
Coding Example - CodeList referencing a complete external codelist

Code Block
<CodeList OID="CL.NRIND" Name="Reference Range Indicator" DataType="text"> <EnumeratedItem CodedValue="ABNORMAL"> <Concept Code="C78802" System="https://www.cdisc.org/standards/terminology" SystemName="CDISC/NCI CT" SystemVersion="2019-12-20"/> <Concept Code="394844007" System="http://snomed.info/sct" SystemName="SNOMED-CT" SystemVersion="2019.10.03"> <Decode> <TranslatedText xml:lang="en">Outside reference range</TranslatedText> <TranslatedText xml:lang="es">por fuera de los parámetros de referencia</TranslatedText> </Decode> </Concept> </EnumeratedItem> <EnumeratedItem CodedValue="HIGH"> <Concept Code="C78800" System="https://www.cdisc.org/standards/terminology" SystemName="CDISC/NCI CT" SystemVersion="2019-12-20"/> <Concept Code="281302008" System="http://snomed.info/sct" SystemName="SNOMED-CT" SystemVersion="2019.10.03"> <Decode> <TranslatedText xml:lang="en">Above reference range</TranslatedText> <TranslatedText xml:lang="es">por encima del intervalo de referencia</TranslatedText> </Decode> </Concept> </EnumeratedItem> <EnumeratedItem CodedValue="LOW"> <Concept Code="C78801" System="https://www.cdisc.org/standards/terminology" SystemName="CDISC/NCI CT" SystemVersion="2019-12-20"/> <Concept Code="281300000" System="http://snomed.info/sct" SystemName="SNOMED-CT" SystemVersion="2019.10.03"> <Decode> <TranslatedText xml:lang="en">Below reference range</TranslatedText> <TranslatedText xml:lang="es">por debajo de los límites de referencia</TranslatedText> </Decode> </Concept> </EnumeratedItem> <EnumeratedItem CodedValue="NORMAL"> <Concept Code="C78727" System="https://www.cdisc.org/standards/terminology" SystemName="CDISC/NCI CT" SystemVersion="2019-12-20"/> <Concept Code="281301001" System="http://snomed.info/sct" SystemName="SNOMED-CT" SystemVersion="2019.10.03"> <Decode> <TranslatedText xml:lang="en">Within reference range</TranslatedText> <TranslatedText xml:lang="es">dentro de los límites de referencia</TranslatedText> </Decode> </Concept> </EnumeratedItem> <Concept Code="C78736" System="https://www.cdisc.org/standards/terminology" SystemName="CDISC/NCI CT" SystemVersion="2019-12-20"/> <Concept Code="442705008" System="http://snomed.info/sct" SystemName="SNOMED-CT" SystemVersion="2019.10.03"> <Decode> <TranslatedText xml:lang="en">Reference range interpretation value</TranslatedText> <TranslatedText xml:lang="es">valor de interpretación de rango de referencia</TranslatedText> </Decode> </Concept> </CodeList>

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