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.
In drawing templates, these attributes show the contents of the
Description, Info 1, and Info
2 fields in the Revision handling dialog box for the latest revision of the drawing. In REVISION lists they also show the
revision history.

You can also use these attributes as print file name switches. For example, to add the contents of the Info 1 field in the drawing print file name, add
%TPL:REVISION.TEXT2%
as the value for the advanced option XS_DRAWING_PLOT_FILE_NAME_A, XS_DRAWING_PLOT_FILE_NAME_W, XS_DRAWING_PLOT_FILE_NAME_G, XS_DRAWING_PLOT_FILE_NAME_M, or XS_DRAWING_PLOT_FILE_NAME_C.