Tags Hierarchical Tags (like CMS categories) + Vote if tags are valid!

[محروم.كوم]

Hierarchical Tags.
I have a review article about both the new porsche 911 and some upcoming competition from mercedes and would like to tag/categorize it as

• 911
• porsche
• review
• mercedes

I have a tag system with
porsche
- 911
- - 1990 edition
- - 2000 edition
- Panamera
mercedes
- s-class
- c-class

Now I use the tag 1999 edition, but the system also adds the tag porsche (so that I can not opt-out!) as it is its parent-parent tag. Any time the tag 911 is used, it has to be a topic about porsche!

Voting for tags.
Now one user adds the category s-class to this post but 99% of my users vote this tag is invalid! Another user adds the tag 1990 edition and 85% of my users vote for yes, so this tag is added and displayed as valid.

I very much need hierarchical tags as I have articles with three levels tags but these tags/categories are just displayed next to each other. __DEFINE_LIKE_SHARE__