Policy Plus - Slow but steady filter progress

I did just a little scratching at the filter feature for Policy Plus. The Filter Options dialog can now produce a filter configuration object, but actually using those settings is proving difficult. I'm currently trying to figure out what it means for a parent product to be enabled but not some of its children. Once I come to a decision on that, I can write the chunk that checks whether a product or range is met, then everything else falls into place with the check for whether a support element (either a product/range or another support definition) is met.