duplicate is a data element in the repository that is considered a duplicate based on a number of properties. Duplicates can occur with concepts that can be divided into elements and relationships. Elements Elements are actually the blocks on a diagram with certain properties within a modeling language and an appearance. Duplications can be considered the same based on these characteristics:

• Name of the element (possibly based on missing punctuation marks)
• Version number
• Modelling language and Object type within the language. Also referred to as a stereotype.

Relationships Relationships or connectors are actually the connecting lines on a diagram with certain properties within a modeling language and an appearance. Duplicate relationships can be considered the same based on these characteristics:

• Name of the relationship or cardinalities of the start and end points of the connectors
• Version number
• Modelling language and Object type within the language. Also referred to as stereotype