The Bundle ID is in the format com.yourcompany.$(PRODUCT_NAME:rfc1034identifier)
The Xcode project accepts the default value for the Bundle identifier, as described above. At the same time, $(PRODUCT_NAME:rfc1034identifier) gives the name of the product.
Here (PRODUCT_NAME:rfc1034identifier) is the package identifier suffix.
Let's consider that you created a project called "HelloWorld". For this project, $(PRODUCT_NAME:rfc1034identifier) returns "HelloWorld" as productName. This will be the packet identifier suffix.
Satya
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