I have a page listing blog posts which come from a blog collection. Each post has a category which is maintained as a taxonomy. What I'd like to be able to do is exclude blog posts in certain categories from being shown in the list.

I've tried various permutations using :isnt such as taxonomy:categories:isnt="Feature updates" but with no success.

Does anyone have any thoughts or insights as to whether this is possible and if so what's the correct syntax to use?

Thanks