1.   The traversal algorithm also allows users to specify link-type priorities.

2.   Users specify their needs rather than having to construct the procedures to retrieve the required data.

3.   The user specifies the option required by pointing the mouse to the icon and pressing a button on the mouse to activate that process.

4.   The user can specify an issue number or use the default which is the latest version.

5.   The user has specified a value for the number of items in the named list which exceeds the valid range.

6.   The user has specified a preferred issue of a module but this issue does not exist in LIFESPAN.

7.   The user has specified a preferred issue which is not in the valid format.