In a data load or dimension build rules file, you can refer to header information in the data source. Placing header information in the data source allows you to use the same rules file for multiple data sources with different formats, because the data source format is specified in the data source header and not the rules file.
Header information defined in the data source takes precedence over header information defined in the rules file.
To specify the location of header records in a data source:
Using a text editor or spreadsheet, place header information in the first record of one or more data sources.
Select Options, then Data source properties.
In the Data Source Properties dialog box, select the Header tab.
In the Header tab, enter the header location information.
Click OK.
“Defining Header Records” in the Oracle Essbase Database Administrator's Guide