Producers often offer several levels of service depending on consumers' subscription levels (for example). This is implemented at the WSRP level with the registration concept: producers can assert which level of service to provide to consumers based on the values of given registration properties.

There might also be cases where you just want to update the registration information because it has changed. For example, the producer required you to provide a valid email and the previously email address is not valid anymore and needs to be updated.

It is therefore sometimes necessary to modify the registration that concretizes the service agreement between a consumer and a producer. Let's take the example of the producer requiring an email you configured in Section 6.5.2.1, “Using the configuration portlet”. If you recall, the producer was requiring registration and required a value to be provided for the email property.

Suppose that you want to update the email address that you provided to the remote producer. To do so, you need to tell the producer that our registration data have been modified. Let's see how to do this. In case that you want to configure access to the producer as previously described, please go to the configuration screen for the self producer and modify the value of email to foo@example.com instead ofexample@example.com:

Now, click "Update properties" to save the change. A "Modify registration" button should now appear to let you send the new data to the remote producer:

Click this new button and, if everything went well and your updated registration has been accepted by the remote producer, you should see something similar to: