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E026 Duplicate Key Item

Umple semantic error reported when a key has a duplicate item

If an item (attribute, association, state machine) appears twice in a key, it is an error, since Umple cannot tell the preferred order of items.

Example

// The following example has error 26
// since the key has 'a' twice
class X26dupiteminkey {
  a;
  b;
  key {a, b, a} 
}

      

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