Hi,
Are you using a portal application?
In each portal app there is the portalapp.xml file, in which you can place attributes.
These attributes can be changed later (after creating iView from this app) directly from the property editor for example or from code.
See here for more info on component profile:
https://help.sap.com/saphelp_nw73/helpdata/en/49/d822ad79cf0e80e10000000a42189b/content.htm?
Best Regards,
Tal