IBM Cognos User Manual page 131

3. If categories have not been generated for the time dimension in your model,
click Generate Categories from the Run menu. By generating categories
immediately, you do not have to wait until cube creation to see the Period
information in the Conversion Rates box of the Currency Table dialog box.
4. Add a data source to your model for each conversion rate source file. If you
create the time dimension from more than one source file, make sure that the
date column names match.
5. For each source in the Data Sources list, double-click it to open its property
sheet, click the General tab, and clear the Sets the current period check box
and all check boxes under Timing.
Alternatively, ensure that the conversion date column has a different name
from that of the column used to create the time dimension.
6. Click OK.
Creating a Base Table
Follow these steps to create a base table.
Procedure
1. From the File menu, click Currency Table and select the Use an external
currency data source check box.
2. If you want to change the base currency from the default, which matches the
locale setting of your operating system, under Base Currency, click Properties
to open the Currency Record dialog box, select a different Country or region
code from the list and click OK.
3. Confirm that the Base table columns box shows the correct names for the
Date, Country or region code, Rate, and optional Label source columns. If not,
click the ellipsis (...) button to the right of the column name box and make
corrections in the New Association dialog box.
If the base table columns are not yet defined, click Add to specify the
associations for mandatory source columns in the New Association dialog box.
4. When all of the Currency Table options are set, click Load Table.
Conversion rates are added for each period (date category) you specified, and
the required currency records are created for your model.
Enabling Currency Conversion
After preparing the conversion source files and creating a base table, you can
enable the currency conversion.
Procedure
1. Specify the time dimension level to which the conversion rates apply by
clicking each currency in the Currencies box of the base Currency Table and
clicking Properties to open the Currency Record dialog box.
2. Confirm that the Date level property is correctly set.
3. Click OK to update the currency data.
4. Open the property sheet for each measure that requires currency conversion
and, on the General tab, click Allow currency conversion.
Example - Converting Measures Using a Base Currency File
You use a comma-delimited text file to supply currency conversion rates for the
periods defined by the time dimension in your model.
Chapter 5. Modeling Your Key Performance Measures
117