Hi,

Here how you can similar scenario:

1) Create a data table (local data storage) with property .RoleName

2) In records create RoleName as "other".

3) In the work class create two property .RoleName and .NewRoleName

4) Fetch the .RoleName from the datapage D_RoleNameList which in turn query the table created in the first step.

5) Have refresh this section on the .RoleName change event.

6) For .NewRoleName has condition on visibility.   something like .RoleName=='Other'

7) Write an activity on post processing "commitRoleName"

8) Have a when rule in the first step 

9) Create a role page for data class 

10) do a property-set and then obj-save. and then remove the role page.