Hi Praveen
It's a defect in the example. A Customer (a specialization of PartyRole) must by definition have exactly one engagedParty - which is the party (individual or organization) that is playing the role (of customer in this case, or indeed any other role).
The examples were fixed in the v5 API assets, as you can see in the Open API table https://www.tmforum.org/oda/open-apis/table
In general, the examples are illustrative not normative - its the swagger/OAS file that actually defines the model. We do try to validate the examples against the schema, and in v5 this has been done much more rigorously.
Hope it helps
------------------------------
Jonathan Goldberg
Amdocs Management Limited
Any opinions and statements made by me on this forum are purely personal, and do not necessarily reflect the position of the TM Forum or my employer.
------------------------------