Complex sentence: Creo Elements/Direct Drafting is designed as an open system, i.e. contractors made the necessary application-specific solutions: for example, a "standard_part" eLibrary for mechanical engineering.
Split into simpler sentences: Creo Elements/Direct Drafting is designed as an open system, i.e. contractors made the necessary application-specific solutions. For example, a "standard_part" eLibrary for mechanical engineering.