[pjb]

I agree with achuri and the later comments about metadata. One example: there are lots of task I cannot do if the temperature outside is too low; if I had a tag/flag for "warm enough to varnish" it would make it easy to find/enable/hold a bunch of tasks to keep the deck cleared/full of tasks that could actually not/be done at that time in their given contexts. Work around is to use the comment section but that is just messy. Multiple contexts is an answer, but metadata is more flexible.