D.S.
I would like to suggest the book "no cry sleep solution" that gives ideas for understanding a child's sleep patterns and how we can help them sleep.
Also, my son is now a year old and has never slept a lot. Looking back over the last year, there were points where he just needed to be close and I would wear him (in a carrier, or in my bathrobe even!) while he napped. That way he could get the sleep he needed and feel safe and comfortable with naptime. Sometimes it took a few days, but after keeping him close for a little while he would nap on his his own (usually after some breastmilk). Try the book I mentioned, it has good suggestions for things to check about our own behavior and our child's surrounding, and how those might affect baby's ability to nap. It's a tricky balance between encouraging a nap before they're tired enough, or after they're overtired! Hang in there!
All said, from your post it still sounds like she is getting enough sleep, and rest time may just be all that she needs.
Take care!