Saved (predefined) searches

But tag sidebar is already taken for tags, isn't it? )

why not have a special icone to show that the "tag" is a search ?
or to put all search on top or on the bottom of the tag list ?
with the ability to minimize the list of search or the list of tags

Very interesting. Such a "virtual tag" should be selectable using the same standard as for regular tags, that is dropdown in the search-box and using it by pressing Ctrl+Enter.

"virtual tag" : I like the name :-) it sum up the whole idea.

with logical-expressions-for-tag-search-like-tag1-and-not-tag2-or-tag3
it could be interresting

Hi

My first thought was - in some cases this like tag hierarchies (e.g. your example with hobbies).
My second thought was - this is very similar to 'saved search queries' requested here:
http://roadmap.cintanotes.com/topic/15284-saved-pr... (which is already 'planned')

Maybe we could/should store the 'saved search queries' as virtual tags in the tag sidebar. This would nearly fulfill your request - wouldn't it?

Tag hierarhies wouldn't be useful in this case, because chosen tags could be selected from different branches/hierarhies.
But I think that "virtual tags" a.k.a "saved search queries" placed near common tags, would be ideal. In the comments section of that topic Boris Monti mentioned this:
> With logical-expressions-for-tag-search-like-tag1-and-not-tag2-or-tag3
> it could be interresting

So virtual tags with "saved search option" and "tag selection option", i.e. (tag1 OR tag2 OR TEXT like 'todo') are way beyond my expectations!