Some descriptive flexfields in Oracle E-Business Suite are documented explicitly with specific setup suggestions, but most descriptive flexfields in Oracle E-Business Suite, which are meant to be set up on a site-by-site basis, are not explicitly documented.
In most cases, you can identify which descriptive flexfield appears on a particular form using the following procedure.
To identify the descriptive flexfield present in a window:
Navigate to the window and block for which you want to set up the descriptive flexfield.
Use the Help menu to choose Diagnostics > Examine. If Examine is disabled or requires a password on your system, contact your system administrator for help.
The Examine Field and Variable Values window initially displays the hidden block and field names of the field your cursor was in when you opened Examine. Note the block name displayed to help you select the correct flexfield in a later step.
Use the list on the Block field to choose $DESCRIPTIVE_FLEXFIELD$.
If there is more than one descriptive flexfield for your form, use the list on the Field field to select the one you want (the list displays the hidden block names and field names for all descriptive flexfields on the form).
If you do not see the descriptive flexfield you want, it may be because your form has special logic that prevents the flexfield from being read by Examine, such as logic that makes the flexfield appear only under certain conditions. Make sure the descriptive flexfield is visible, that those conditions are met, and that your cursor is in the same block as the flexfield. Try using Examine again.
The flexfield title that appears in the Value field is the title you should choose in the Descriptive Flexfield Segments form. See: Defining Descriptive Flexfield Structures.