I'm looking for library/technique for storing my game resources - levels, object (effects,world info), items(price,effects,...), NPC(visual info, behavior), everything except graphics/audio stuff. I've seen lua used for Awesome WM configuration. protobuf looks good, but it seems to be designed for network communication. I've tried to write my own parser, but as the project grows it's more and more harder to manage it and catch all the bugs.

My requiremets:

• stability
• easy extension of data without need to convert older versions to newer
• good(don't have to be the best) performance of loading
• not much coding
• not XML!