# Can LOINC be defined as a Controlled Terminology?

**URL:** <https://forum.loinc.org/t/can-loinc-be-defined-as-a-controlled-terminology/950>\
**Category:** general-discussion\
**Created:** [September 8, 2017, 2:00am UTC](https://forum.loinc.org/t/can-loinc-be-defined-as-a-controlled-terminology/950 "2017-09-08T02:00:25Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![system](https://forum.loinc.org/uploads/default/original/1X/dbab97ce9b2987d788a376e254fcaae249f3b672.png) [@system](https://forum.loinc.org/u/system)\
**Post date:** [September 8, 2017, 2:00am UTC](https://forum.loinc.org/t/can-loinc-be-defined-as-a-controlled-terminology/950/1 "2017-09-08T02:00:25Z")

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I noticed you have a set of instructions for configuring MedDRA. But how would we add LOINC?

The example for the UNII dictionary only shows two columns. For LOINC it needs several variables whose values confer uniqueness to the row. For example, a row-uniqueness is usually determined by the combination of LOINC NUM, COMPONENT, PROPERTY, SYSTEM and METHOD.

Thanks

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**Author:** ![thanhan](https://forum.loinc.org/letter_avatar_proxy/v4/letter/t/8edcca/32.png) [@thanhan](https://forum.loinc.org/u/thanhan)\
**Post date:** [August 26, 2020, 11:25pm UTC](https://forum.loinc.org/t/can-loinc-be-defined-as-a-controlled-terminology/950/2 "2020-08-26T23:25:40Z")

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You have tried to access UNII

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**Author:** ![system](https://forum.loinc.org/uploads/default/original/1X/dbab97ce9b2987d788a376e254fcaae249f3b672.png) [@system](https://forum.loinc.org/u/system)\
**Post date:** [June 23, 2023, 3:36pm UTC](https://forum.loinc.org/t/can-loinc-be-defined-as-a-controlled-terminology/950/3 "2023-06-23T15:36:38Z")

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