Using a local Array in a Business Rule

Newbie question here...
I am writing a business rule that applies a standard rate to a lot of different lines in a business rule. This rate only varies by year, so from a logical perspective I think of it as a 1 dimensional variable. However the rate is actually stored in my normal Essbase cube (8-dimensions) something like the following:
Dimension Dimension Member
Account: Rate
Dim2: No Dim2 Value (A dimension member called "No dim2 Value")
Dim3: No Dim 3 Value
Dim4: No Dim4 Value
Dim5: No Dim5 Value
Dim6: No Dim6 Value
Dim7: No Dim7 Value
Year: [varies by year]
So right now my formula to calculate things looks something like the following:
"Target Account 1" = "Driver Account 1" * Rate ->
"No Dim2 Value" ->
"No Dim3 Value" ->
"No Dim3 Value" ->
"No Dim5 Value" ->
"No Dim6 Value" ->
"No Dim7 Value"
But I have to do this for several "Target" and "Driver" Accounts in the rule, which means an ugly looking rule. What I would like to do is create a local array at the beginning of my business rule and populate it with the rate:
ARRAY _rate[Year]
and then set the value of the array equal to
Rate -> "No Dim2 Value" -> "No Dim3 Value" -> "No Dim3 Value" ->
"No Dim5 Value" -> "No Dim6 Value" -> "No Dim7 Value"
This will allow me to simplify my formula down to
"Target Account 1" = "Driver Account 1" * _rate
My first question is "can I do this?" I've been able to create an array and use it in the formula, but I can't figure out how to populate the values in the array from my main Essbase cube.
The second question is "does it make sense to do this?" In addition to making the code easier to read, my guess is that populating the array once and just using it within the scope of the rule would be a bit more efficient than referencing that big cross dim expression, but I really don't know.
Any advice anyone has would be appreciated.
Thanks
-Glenn

I am familiar with what you are trying to accomplish.
Having Essbase store a fixed rate over time to be used in calculations is possible. However formulas start to look complex depending on how many dimensions you have and what the desired outcome is.
There are alternate techniques to the one you mentioned.
You can create a new database for rates only and make it with fewer dimensions. Then use the @XREF function to retrieve it in your formulas.
If the rate doesn't change very often you can put the Rate inside of the formula as is.
For example Y2006_Rate = 5%.
Brian Chow

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