Yes.  StrataFrame does have automated support for both primary and composite keys.  This includes relationship management and when the business objects are created or updated.  There are also a number of built in methods such as FillByPrimaryKey that intrinsically supports the primary key and compound keys.

Yes.  StrataFrame has the ability to manage all of your NULL fields through the business object.  This is a very simple customization to make on a single field or for all of your business objects.  It is very flexible and easy to implement.

Does strataframe.net has any configuration to allow developer to choose whether user can modify primary/composite key?

Does it auto check if any not nullable field is empty?

Thank you