Enabling Conversion Using A Base Currency Table - IBM Cognos User Manual

(such as euro triangulation) to follow. For more information, see "Enable
Conversion Using a Euro Table" on page 118.
We recommend that you always build cubes in Cognos Transformer using the
system locale that matches the locale of the measures in your cube, and that you
explicitly define a default currency for the data in each model.
Also, if you use more than one data source to supply the conversion rates for the
Currency Table, you must ensure that the column names match so that the
information is combined properly in Cognos Transformer.

Enabling Conversion Using a Base Currency Table

You use the base Currency Table to confirm or change the default currency for the
data in your model.
Initially, it shows the default currency of the country or region specified in the
locale setting of your operating system, such as <Base default> (USA). You can
change this to any other currency, including the euro. When you load a conversion
table into a populated model, the data appears in the Conversion Rates box.
You should clear the Timing options in the property sheets for all currency data
sources so that updates to the Currency Table do not interfere with category
generation in the rest of your model. If you decide to leave all Timing options at
their default settings, ensure that the names of the date columns for the base and
euro currencies differ from the name of the column used to create your time
dimension, and from each other. Otherwise, Cognos Transformer cannot
differentiate between them.
The Check Model tool issues a warning if your model contains a Currency Table
but none of the measures have currency conversion enabled. You can ignore this
message; however, currency conversion will not be available in any OLAP
reporting components.
The Currency symbol and Decimals options available in the reporting components
that support run-time currency conversion are determined by the Country or
region code list. To override these defaults, you must specify alternatives in the
Currency Record dialog box.
Preparing Rate Conversion Source Files
You must prepare your source files for rate conversion.
Procedure
1. Create one or more source files to populate the required currency conversion
2. If you have a time dimension that does not contain unique levels, you must
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tables in your model. These files should contain columns for
v the dates to which the conversion rates apply
v the codes for the countries or regions to which the conversion rates apply
v the conversion rates, expressed as the amount by which you multiply a unit
of the given currency to convert it to a unit of the base currency
v optionally, a label for the currency
If you do not specify a label, it is derived from the country or region code.
manually make the levels unique. For more information about uniqueness, see
"Resolving Uniqueness Problems in Your Data Source" on page 23.