For hand histories, I think the following tags apply:
- Poker variant (texas-hold-em, omaha, 7-card-stud)
- Betting structure (limit, no-limit, pot-limit)
- live or online
- cash-game or tournament
- Stakes (1-2nl)
- hand-history
Some of the information is duplicate (no-limit and 1-2nl), but which do we cut?
I suppose a related question would be how much information we plan to cram into a tag?
texas-hold-em + no-limit => nlhe
no-limit + stakes => 1-2nl
1-2nlhe?
It will be very hard to follow tags nicely if we go to that level of granularity.