This is a template attribute. Template attributes can be used in filtering, or to retrieve data from the model to use in drawings and reports. For example, when you create a report, Tekla Structures replaces the attributes added in the report template with the corresponding object property values.

This template attribute shows the drawing name (drawing mark from Document manager).

The difference between NAME_BASE and NAME is that NAME shows the drawing type and mark (from Document manager), whereas NAME_BASE shows the mark only.

NAME = A [K1]

NAME_BASE = [K1]