typecode = SBML_TRIGGER
| Version 1 | Version 2 | 
| The Trigger component is not part of SBML Level 1 Version 1 | The Trigger component is not part of SBML Level 1 Version 2 | 
| Version 1 | Version 2 | 
| The Trigger component is not part of SBML Level 2 Version 1 | The Trigger component is not part of SBML Level 2 Version 2 | 
| Version 3 | Version 4 | ||||||||||||||||||||||||||||
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