The

Specref
RefType file t Relationship file

holds one

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per row. Each

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is of a particular type, and has a source

Gloss
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and a destination

Gloss
PreSpace false t concept.

An example of a

Gloss
PreSpace false t relationship

is given below:

Concept
t 371883000|Outpatient procedure| ShowFormat inline

Concept
t 116680003|Is a| ShowFormat inline

Concept
t 71388002|Procedure| ShowFormat inline

where:

• Concept
  t 371883000|Outpatient procedure| ShowFormat inline

  is the source

  Gloss
  PreSpace false t concept;

• Concept
  t 116680003|Is a| ShowFormat inline

  is the

  Gloss
  PreSpace false t relationship type

  Gloss
  PreSpace false t concept

  and;

• Concept
  t 71388002|Procedure| ShowFormat inline

  is the destination

  Gloss
  PreSpace false t concept.

  
  

Caption label
CapId relationship-file-detailed-specification CapType Table
Relationship file - Detailed specification

Bookmarked content insert
Start filespec Page REUSE:Relationship File

Only one

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record with the same id field will be current at any point in time. The current record will be the one with the most recent effectiveTime before or equal to the point in time under consideration.

If the

Gloss
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field of this record is false ('0'), then the

Gloss
PreSpace false t relationship

is

Gloss
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at that point in time. If the

Gloss
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field is true ('1'), then there is a

Gloss
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between the

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PreSpace false t SNOMED CT concepts

identified by

Specref
RefType field t sourceId

and

Specref
RefType field t destinationId

.

The

Specref
RefType field t sourceId

,

Specref
RefType field t destinationId

,

Specref
RefType field t relationshipGroup

,

Specref
RefType field t typeId

, characteristicTypeIdand

Specref
RefType field t modifierId

will not change between two rows with the same id, in other words they are immutable. Where a change is required to one of these fields, then the current row will be de-activated (by appending a row with the same id and the

Gloss
PreSpace false t active

field set to false) and a new row with a new id will be appended.

The

Specref
RefType field t relationshipGroup

field is used to group

Gloss
PreSpace false t relationships

with the same

Specref
RefType field t sourceId

field into one or more logical sets. A

Gloss
PreSpace false t relationship

with a

Specref
RefType field t relationshipGroup

field value of '0' is considered not to be grouped. All

Gloss
PreSpace false t relationships

with the same

Specref
RefType field t sourceId

and non-zero

Specref
RefType field t relationshipGroup

are considered to be logically grouped.

The

Specref
RefType field t relationshipGroup

field will be an unsigned

Specref
RefType data type t Integer

, and will not be limited to a single digit value. There is no guarantee that they will be assigned sequentially, and the values will not be unique across

Gloss
PreSpace false t concepts.

Related Links

• SNOMED CT Machine Readable Concept Model.
• 3.1.3. Relationships
• Appendix C. Unicode UTF-8 encoding

• Gloss
  PreSpace false t Relationship

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