When updating the SID model you should follow these guidelines:

• Follow guidelines in GB922-1U User Guidelines
  
• All entities/attributes should be defined
  
• All attributes should be public, including role attributes for associations
  
• Naming conventions for association names should be followed
  
• Naming convention for association classes should follow the association naming guideline that uses the names of both entities involved in the association
  
• Use tipAttribute - support stereotype to specify if an attribute is optional/mandatory (you can find more information on tipAttribute stereotype in the TIP Profile page)