Tag slug

[voltan]

hello
I think , we need slug for tags ( tag table ) for some words like (( pi engine )) or (( zend framework )) , slug need for title

I add slug manual on my tag word : http://www.faragostaresh.com/blog/tag/pi-engine
But here my tag work is pi-engine But I need pi engine for tag and pi-engine for url !!

wordpress tag system support it : for example http://www.smashingmagazine.com/tag/design-patterns/