Feature request: Tag categories / colours

[benkloester]

I'm using the Android app, and as my cloud of tags starts to grow it gets harder to find things.

Sorting by frequency definitely helps, but because I've designed my ontology as a few different high-level categories, within each of which the tags are not much overlapping, there's not really a core subset of tags that will always consistently be in front (perhaps this is more a problem with my ontology design than the UI though?).

To help with this it would be useful to add an additional dimension with which to segment the tags. This could be as simple as different colours.

Or it could be something more complex like defining tag categories, with tags in each, and then making use of this hierarchy somehow in the UI.
Ideas:

• a series of screens, one per category, showing the tags in that category (i think not lightweight enough)
• categories are just a special kind of tag, which always appear first, and which filter the list of other tags (kind of confusing?)
• Or some combo of the two?
• Other ideas?

Seems like colours are the least worst option I can think of. It would mean adding another config page to assign colours to tags though.

[Insti]

My idea for this was to use some kind of predictive tag grouping view that shows tags that are used together similar to how phone keyboards predict your next word.
It can learn from your existing tags so you don't need to manually categorise everything.