https://download.eclipse.org/modeling/mdt/ocl/javadoc/5.0.0/org/eclipse/ocl/examples/standalone/validity/ValidateCommand.ModelToken.html
ValidateCommand.ModelToken (MDT-OCL Documentation)
mdtocldocumentation
https://download.eclipse.org/modeling/mdt/ocl/javadoc/5.0.0/org/eclipse/ocl/examples/standalone/validity/ValidateCommand.OutputToken.html
ValidateCommand.OutputToken (MDT-OCL Documentation)
mdtocldocumentation