Managing iViews and other PCD Objects

Hi,
I have visited some help on Managing iViews and other PCD Objects at
http://help.sap.com/saphelp_nw04/helpdata/en/fd/ea5c42da4de92ce10000000a1550b0/frameset.htm
But I want to know when are these things actually put to use. For example, I would simply create an iview and add it to a page. Can you give me a real scenario where this is required. Especially if any of you have used this on your projects.
How do I start if I wish to pick up this feature? Any blogs on good exapmles which I can use deploy and learn?
Thanks!!

HI,
Refer these links
<a href="https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/3367e690-0201-0010-d285-c69bd884c9f3">PCD</a>
<a href="https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4192">weblog</a>
<a href="https://www.sdn.sap.com/irj/sdn/weblogs?blog=/pub/wlg/4109">weblog1</a>
====================================
I just tried out some of the API's, i hae not encountered any business scenario's concerning these API's.

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Hi Kust,
To access the PCD objects the code you used looks ok for me but your main issues is related to the dc access permissions. This thread discussed about the similar issue. Please review this below thread.
/message/979328#979328 [original link is broken]
Regards
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