Command Overview

In this section we include a short description of the table commands in alphabetical order, (see the Detailed Command Description in Volume C of the MIDAS User Guide for a more detailed explanation).

Reference to tables

is done by the filename. The extension .tbl must be appended to the filename in commands which can work both on images and tables (e.g.: READ/DESCRIPTOR table.tbl).

Reference to columns

can be done either by ``name'' or by ``number''. Columns are referred to by name as :label, where label is a character string (Note the starting colon `:' in front of `label'.) The string (max. 16 characters, case insensitive) should start with a letter and may contain alpha-numeric characters and the underscore symbol. Columns are referred by number as #n, where n is the integer defining the column position.

Access to rows

can be done in two modes, ``sequential'' or ``direct''.

• Sequential access is defined by the row number as @n, where n is an integer constant.
• Direct access is done through the values in the reference column.