Deduplication is an operation on the contents of the repository that searches for duplicates of elements and relationships. It is then determined which element is considered original in the new situation and the other elements with the same characteristics are considered duplicates. Deduplication is then carried out consisting of a number of actions:

• Merging the contents of the elements
• Merging the relationships
• Updating the diagrams to point to the original
• Renaming and isolating the duplicates
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This is a repetitive task that fortunately can be easily automated within, for example, Sparx Enterprise Architect.