For example, I have a RESTful service called Purchase Service. Should I name my repository:

1. purchaserestservice
2. purchase-rest-service
3. purchase_rest_service
4. or something else?

What's the convention? How about in GitHub? Should public repositories follow some standard?

I'd go for purchase-rest-service. Reasons:

1. What is "pur chase rests ervice"? Long, concatenated words are hard to understand. I know, I'm German. "Donaudampfschifffahrtskapitänspatentausfüllungsassistentenausschreibungsstellenbewerbung."

2. "_" is harder to type than "-"