At my work place, I'm running into an issue where I need to decide whether to bump the major revision (publishing a new version of the web service) or bumping just the minor revision (hoping that the existing consumers don't notice the change).

The change to the existing web service is as follow:

1. existing web service has class A and an enumerated object B. I added a new property to A, and added a new enum value to B.
before
class A
{
int number;
}

enum B { Apple = 1, Oranges = 2}

after
Class A
{
int number;
string name;
}

enum B { Grapes=3, Apple = 1, Oranges 2 }

Does my change require to bump the major revision? Any advise is appreciated.

Thanks

Great overview of a subject that can be confusing. But I believe you need to point out the difference in the request and response, because if you add new elements to the response, then will the Web Service consumer also be forced to re-generate the Web Service client code