Hi Bert,
If you have a NW 7.50 add annotations like this
@ObjectModel.compositionRoot: true
@ObjectModel.writeEnabled: true
@ObjectModel.writeActivePersistence: 'snwd_so' ---> your table name
@OData.publish: true
After activation the CDS, there is a new BOPF. You have generate the classes and activate it.
Then use CRUD Template in Web IDE.
Regards
Klaus