You can delete the entire object type, but not the individual properties of a selected object type once an object type has been created.
To delete an BQY object type and properties:
Choose File , then Administer IBM Information Catalog.
The Connect To Information Catalog Repository dialog box is displayed.
Type the ODBC data source name in the Database Alias field if it is different than the default database alias value.
In the Object Type drop-down list box, select Interactive Reporting document.