It can be useful to report on the coverage of new or changed lines in your source code. You can do this by tagging the new or changed lines, and then creating a report that provides additional information specific to these tagged lines. You can choose to report on some or all of your tagged lines.
You first have to create tags in your source code. The tags can be any appropriate string (such as, for example, sdnw01, or chng02) entered in the left (columns 1 through 6) or right (columns 73 through 80) margin of your source code. Your tags can only be six characters long.
You then run your program in test coverage mode.
You can create the tag-specific information in the test coverage report using the command line TCReport utility.