The following are the steps involved in creating a custom instrument
table:
Create a new subject area within the ERwin model.
Move the required super-class tables as part of the subject area.
Create the custom instrument table in ERwin. Specify logical name, physical
name and description for the table. Define any columns that do not come from any
of the standard super-class tables as part of the custom instrument table.
Specify logical, physical names, domain and other column properties for each
column.
Create subtype relationship between the custom instrument table and various
super-class entities.
Note:
User defined tables ( custom ) tables should not have "PORTFOLIO" keyword
in the name of the table.