Carlos --
The WBS code is a calculated numeric code which is used to enumerate the
Work Breakdown Structure of tasks in a project. When you type the first
task in a project, it is automatically numbered with a WBS of 1. When you
indent a subtask beneath it, the subtask is numbered with a WBS code of 1.1.
The second subtask would be numbered as 1.2 and so on. To view the WBS code
for any project, simply insert the WBS field in any task view, such as the
Gantt Chart view. The WBS field can be modified only slightly, by clicking
Project - WBS - Define Code.
An outline code field is a user defined field. The RBS field is an example
of an enterprise outline code field. Project Server 2002 and 2003 offer
enterprise outline code fields for tasks, resources, and projects. Hope
this helps.