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Changes cannot be made to the Qualifier Value hierarchy without permission from the Head of Terminology.

Definition

Examples

One of several possible values for an attribute used to define concepts

The 362981000 |Qualifier value (qualifier value)| hierarchy contains concepts used as the target value of an attribute in a defining relationship.

The range of values for a particular attribute is provided in the specific concept model of the domain. For further information on the range of values for a specific domain, please refer to the MRCM Project

Number (qualifier value) hierarchy

Concepts that describe numeric values have been added as descendants of  260299005 |Number (qualifier value)|. While the FSN and PT for these concepts use numeric characters, the concepts represent descriptions of a number and are not actually numeric values. To reinforce this, a synonym with the textual description of the number is created for each concept.

For example, 

True numeric values

Textual descriptions of numbers provide a path to representing true numeric values, should that become an option.

Concepts representing numbers

FSN

X (qualifier value)

Trailing zeros are not allowed (e.g. 10, not 10.0)

Preceding zeros are required (e.g. 0.5, not .5)

For example,

  • 25 (qualifier value)
  • 37.5 (qualifier value)
  • 125 (qualifier value)

PT

X

Trailing zeros are not allowed (e.g. 10, not 10.0)

Preceding zeros are required (e.g. 0.5, not .5)

For example,

  • 25
  • 37.5
  • 125

SYN

A synonym representing the concept as a textual description is required

Synonyms are not case sensitive. No commas or other punctuation is allowed. An exception is the hyphen

For example,

  • Twenty-five
  • Thirty-seven point five
  • One hundred and twenty-five

Unit of presentation (unit of presentation) hierarchy

The 732935002 |Unit of presentation (unit of presentation)| hierarchy is used to support harmonization between SNOMED CT's Drug Concept Model and the International Organization for Standardization's Identification of Medicinal Products (IDMP) standards for product strength.

Unit dose

The Unit dose (qualifier value) is unacceptable for representing unit of presentation.

Concepts representing Unit of Presentation

FSN

X (unit of presentation)

For example,

  • Actuation (unit of presentation)
  • Capsule (unit of presentation)
  • Suppository (unit of presentation)
  • Tablet (unit of presentation)

PT

X

For example,

  • Actuation
  • Capsule
  • Suppository
  • Tablet

SYN

Synonyms are not allowed

Disposition (disposition) hierarchy

The 726711005 |Disposition (disposition)| hierarchy is required to support the remodeling of the 105590001 |Substance (substance)| hierarchy. These concepts are used as the attribute values for the 726542003 |Has disposition (attribute)|.  The (disposition) semantic tag is used to differentiate concepts in this hierarchy from similar concepts in other hierarchies. 

Concepts representing Disposition

FSN

X (disposition)

For example,

  • Coagulation factor inhibitor (disposition)
  • Acute phase reactant (disposition)
  • Human immunodeficiency virus fusion inhibitor (disposition)

PT

X

For example,

  • Coagulation factor inhibitor
  • Acute phase reactant
  • HIV fusion inhibitor

Modeling

Techniques, as qualifier values, should include the word technique in their FSNs.

For example,

International System of Units - unit of mass (qualifier value) hierarchy

The 258681007 |International System of Units unit of mass (qualifier value)| hierarchy contains concepts representing metric units of mass.

Concepts representing Unit of Mass
FSN

X metric unit of mass
Lower case with case sensitivity, ci

PT

X metric unit of mass

Lower case with case sensitivity, CS

SNOMED CT exception: abbreviated without the expanded form

SYN

X metric unit of mass

Lower case with case sensitivity, ci

International System of Units - derived unit of volume (qualifier value) hierarchy

The 282115005 |International System of Units-derived unit of volume (qualifier value)| hierarchy contains concepts representing metric units of volume.

Concepts representing Derived Unit of Volume
FSNX metric unit of volume
Lower case with case sensitivity, ci

PT

X metric unit of mass

Lower case with case sensitivity CS

SNOMED CT exception: abbreviated without the expanded form

For example,

  • dL

  • mL

  • L

SYN

Lower case with case sensitivity ci

For example,

  • deciliter

  • milliliter

  • liter

Pharmaceutical dose form (dose form) hierarchy

The 736542009 |Pharmaceutical dose form (dose form)|* hierarchy contains concepts support the drug model.  Please see the Drugs Project Confluence page, Pharmaceutical dose form Hierarchy - Editorial Guidelines.

Other Qualifier Value Subhierarchies that Support the Drug Model

See the separate guidelines for the following qualifier value subhierarchies that support the drug model at the Drugs Project Confluence page, Supporting hierarchies.  

*For these concept model domains that support the drug model, see the attribute and range tables at the Pharmaceutical/Biologic Product Attributes Summary page.



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