This is a new feature in civil 3D allowing you to attach any data template to all objects and entities in civil3D. Not only alignments, corridors, surfaces... but all plain Autocad Entities as well.
Are there any plans to support reading and writing these in the futur?
Thank you for bringing this up. This has been raised as a potential new feature. No specific plans exist to support it yet, but interest is being gathered through feedback like this.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.