Add new member to Period Dimension, and how to choose Period Type

 hi,

added one member YearTotal2 to Period Dimension, in order to accumulate in cross year(eg:  FY12->Apr:Dec + FY13->Jan:Mar).

while add the member, there is one option : Period Type: 

Base Time Period,

Summary Time Period

Year TIme Period

Alternate TIme Period

how to choose such parameter, searched such paramter from the epma document, cannot get any good info.

thanks for your sharing.

for example: I added two member marked as summary time period, I would happen to such error:

Error Details

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Error : The Period Type property is invalid for member 'YearTotal2' in the Period dimension.  This value is not allowed for a top-level member.