How to filter by attributes with type Strings

The documentation is not really detailed about setting attributes with type Strings. I assume I've to type each string value in a new line in the set attributes dialog box. This works fine and my XML looks like this<br /><br /><para CMS = "prodA prodB"><br /><br />having set the two string values "prodA" and "prodB".<br /><br />But how to filter these attributes? The filter CMS="prodA" shows my paragraph correctly, but CMS="prodB" does not show this paragraph as it should. Filters seem to match only the first of the set of string values.<br /><br />I would like to show this paragraph in two document versions for these two products prodA and prodB.<br /><br />Framemaker 8.0.3<br /><br />Tilman