- A homogeneous material with a definite composition Profile of Substance for decision support/quality metrics. Defines the core set of elements and extensions for quality rule and measure authors.
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Key: = Must support, = QICore-defined extension, = Is-Modifier
Field Card. Type and Description 
category 0..*List<Concept>A code that classifies the general type of substance. This is used for searching, sorting and display purposes.Binding: Substance Category Codes (Extensible)
code 1..1ConceptA code (or set of codes) that identify this substance.Binding: Substance Code (Example)
description 0..1StringA description of the substance - its appearance, handling requirements, and other usage notes.identifier 0..*List<Identifier>Unique identifier for the substance.ingredient 0..*List<Ingredient> (TBD)A substance can be composed of other substances.instance 0..*List<Instance> (TBD)Substance may be used to describe a kind of substance, or a specific package/container of the substance: an instance.Key: = Must support, = QICore-defined extension, = Is-Modifier
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