This is something that I have been trying to do also.
I am in the process of setting up a Repository/Referatory for freely available Medical Education Resources. Each WP Post contains content about a medical resource, and a link to the resource. Each post can belong to one or more category, and can be tagged to represent target audience, difficulty, resource type, etc.
The Relevanssi plugin has made searching and filtering by category amazingly powerful. Thank You.
However the number of resources is going to continue to grow in the coming months and years, and would love to be able to further filter by tags.
For example: Search for “searchterm”, in Category “Diabetes”, and tagged as “Lecture, Senior Doctor”
somesite.com/?s=searchterm&cat=8&tags=lecture,snr-dr
Using the “&Cats” term in the search I can search in multiple Categories (although seems to be working as an OR filter rather than AND), this functionality for tags would make my day!!
Loving the plugin. Thanks
(currently using the free version, as a department we may soon look to the Premium version)