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 attribute shows the date of the last changes to the drawing. If the
advanced option XS_IMPERIAL_DATE is set, the date format is mm/dd/yyyy. Otherwise the format
is dd.mm.yyyy.
Use this attribute in part, cast unit, and assembly lists.