Pedigree Query

I have finally found out what CC= means ( Center of Distribution) but still don't know the real meaning of it. Also found out what DI= means ( Dosage Index) but still dont know what that means. So can someone please tell me something about this mare High N' Wry ; she is by Esops Foibles and Wry Swis...

We just bought an AQHA mare over the weekend and she has TB on her papers. She has High N' Wry M, 1981 DP= 5-4-10-05 (24) DI= 1.40 CD= 0.17 This is her granddam. I need to know what the DP= is and all the numbers that follows, also what does DI= mean and what does CD= mean? We are AQHA owners and th...