SNOMED CT Editorial Guide

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Modeling 

Parent concept

Most distal appropriate descendant of 105590001 |Substance (substance)|

Semantic tag

(substance)

Definition status

Primitive

Attribute

738774007 |Is modification of (attribute)| relationship to the substance with unspecified hydration

726542003 |Has disposition (attribute)|, as appropriate

Hydrates

Hydates are modeled with an 738774007 | Is modification of (attribute)| relationship to the substance with unspecified hydration. 

For example,

    • Ferrous oxalate dihydrate (substance) is modification of → Ferrous oxalate
    • Caffeine hydrate (substance) is modification of → Caffeine
    • Zinc sulfate heptahydrate (substance) is modification of → Zinc sulfate

Naming Guidelines

FSN

Pattern:

  • X hydrate (substance)
  • X dihydrate (substance)
  • X monohydrate (substance)

For example,

      • Copper sulfate pentahydrate (substance)

Preferred Term

Pattern:

    • X hydrate
    • X dihydrate
    • X monohydrate

For example,

      • Copper sulfate pentahydrate

Exemplar

The following illustrates the inferred view.

 Caffeine hydrate (substance) IS MODIFICATION OF Caffeine (substance)

Anhydrous compounds

Anhydrous compounds have an 738774007 | Is modification of (attribute)| relationship to the unspecified substance, i.e. where the level hydration is not specified.

For example,

    • Sodium carbonate anhydrous (substance) is modification of → Sodium carbonate
    • Theophylline anhydrous (substance) is modification of → Theophylline

Naming Guidelines

FSN

Pattern:

  • X anhydrous (substance)

For example,

      • Theophylline anhydrous (substance)

Preferred Term

Pattern:

  • X anhydrous

For example,

      • Theophylline anhydrous

Synonyms

Anhydrous X

Exemplar

The following illustrates the inferred view.

Theophylline anhydrous (substance) IS MODIFICATION OF Theophylline (substance)


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