SNOMED Documentation Search


 Other Documents

Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

To indicate that an expression has a definition status of 'equivalent to', three consecutive equals signs (i.e. "===") are placed at the start of the expression. For example, the following expression represents the definition of the fully defined concept

scg-expression
Concept
t31978002
|Fracture
of
tibia|
:

Scg expression
Borderridge
ShowFormatblock
   === 46866001|Fracture of lower limb| + 428881005|Injury of tibia|:
       116676008|Associated morphology| = 72704001|Fracture|,
       363698007|Finding site| = 12611008|Bone structure of tibia|

Because expressions are most often used to represent the full definition of a clinical meaning, 'equivalent to' is the assumed definition status when it is not explicitly stated. For this reason, the expressions above has an identical meaning to the following expression:

Scg expression
Borderridge
ShowFormatblock
   46866001|Fracture of lower limb| + 428881005|Injury of tibia|:
   116676008|Associated morphology| = 72704001|Fracture|,
   363698007|Finding site| = 12611008|Bone structure of tibia|

Using 'equivalent to' as the assumed definition status helps to ensure the backward compatibility of this version of compositional grammar with the previous one.

...

For example, the primitive precoordinated concept

scg-expression
Concept
t46635009|Type
1
diabetes
mellitus|
ShowFormatinline
can be defined using the expression:

Scg expression
Borderridge
ShowFormatblock
   <<< 73211009|Diabetes mellitus|: 363698007|Finding site| = 113331007|Endocrine system|

The definition status of 'subtype of' on this expression indicates that the definition is not necessarily sufficient to define the concept

scg-expression
Concept
t46635009|Type
1
diabetes
mellitus|
.
Display Footnotes Macro
 
Page break