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Relationships that are used to define extension concepts can be modified. However, please note that only the values of mutable attributes may be modified. As indicated in
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Relationships authored by SNOMED International, which define concepts in the International Edition, should not be modified. If an error is detected in the International Edition, which requires one or more relationships to be modified, the issue should be documented and reported to SNOMED International using the Content Request Service. In situations in which an extension producer needs to modify a relationship to temporarily fix an issue, this should be done in a module owned by the extension producer, and reported to SNOMED International It is recommended that extension producers try to avoid modifying international relationships, as such modifications may affect the results of subsumption testing and therefore may have an impact on cross-edition interoperability.
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Mutability of relationship attributes |
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The table below provides a summary of the process to follow when modifying a relationship in an extension.
File Type | Process |
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Stated Relationship or Relationship | A new row which represents a new version of the modified relationship is added to the respective relationship file. |
The attributes of the new version of the relationship are set as follows:
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