Is it possible to filter the prodinfo element in a ditamap?

I have a ditamap that is used for five different product guides. Right now we use the prodinfo element of the map to generate the product-specific title for the PDF output.

I've tried adding the different product names as separate prodinfo elements in the map, but filtering doesn't produce the result I'm looking for. I've tried setting the attributes of each prodinfo element and using the product ditaval to choose the correct product name in the title of the guide. Our cover page uses the prodinfo element to populate the title page. I want to extend it so that we're not having to enter the product information each time we use the ditamap. I was hoping to insert a series of prodinfo elements in the topicmeta for the map. The output, to PDF, simply showed the default variable entry for the prodinfo element (Product). The variable is BM_ProdName which is tied to the prodinfo element.

I don't know if I've actually described this well.

Thoughts?

Wanda