Simulink Identifiers

A Simulink^® Identifier (SID) is a unique and unmodifiable designation automatically assigned to a Simulink block, model annotation, or Stateflow^® object within a Stateflow chart. The SID helps to identify specific instances of these components in your diagram, especially when sharing models between people within a team.

The SID has these characteristics:

• Persistent within the lifetime of a Simulink block, model annotation, or Stateflow object

• Saved in the model file

• Remains the same if the block or object name changes

• Cannot be modified

The SID format is:

model_name:sid_number

• model_name is the name of the model where the block, annotation, or Stateflow object resides.

• sid_number is a unique number within the model, assigned by Simulink.

The SID includes additional colons in certain cases, for example on an instance of a block from a user library.