You can achieve this with data groups. See Configuring a Data Group Data Source that Lets You Switch Between Multiple Data Sources for details.

Manually creating a data source for parameterizing large, complex XML messages can be time-consuming and tedious.

For a fast way to accomplish this, have SOAtest automatically generate a CSV data source template based on the structure of the request or response message that you want to parameterize. Columns in the generated data source are automatically mapped to the appropriate elements in the request or response message. The only thing you need to do is add values to the generated data source template.

For details, see Generating a Data Source Template for Populating Message Elements_soa.

Video Tutorial: Using Data Sources to Parameterize Tests