Modeling with advanced techniques > Features > Custom process features > Naming conventions for custom process features
  
Naming conventions for custom process features
The names of custom process features are automatically generated from the name string in the definition file. Any non-alphanumeric characters in the original string (excluding underscores) are converted to underscore characters. Each time a feature is used to the same part, a numeric suffix is incremented to make the name unique to all owning parcels. For example, you might have red_paint1, red_paint2, and so on if the red_paint feature was applied more than once on the same part.
If necessary, you can change the name of a custom process feature using the Rename command on the Feature tab, in the Custom Feature group.