Based on "Developer Info: Collection Design", the Info panel can display properties in three different kinds of text: Filters, Static Text, and Links. Howerer, I'm only able to define the cxml that shows as Filters, the cxml looks like this:
If I understand the question, you will need to look at the values in the <FacetCategories> nodes, found above the <Items> tag in your copy paste. As an example, setting the "Age" facetcategory for IsMetaDataVisible will show the value in the infopane. If
you set IsFilterVisible False, there will not be a filter, which for this single faceted collection example, will seem strange.
The supported FacetCategory Types are Number, Date, String, LongString, and Link, here are some examples from an AMG Movie Collection, if you play around with your FacetCategory values and look at the filterpane, search, and infopane, the capabilities will