Hi all,

I'm currently trying to work out why I get an error when trying to load a 
dict with several dataframes in it with HDF5, JLD, see 
https://github.com/timholy/HDF5.jl/issues/158

which results in this error:
*ERROR: stored type DataFrames.Index does not match currently loaded type*

I just wanted to reach out to the dataframes crowd: I don't actually know 
what DataFrames.Index is or does. In the issue I filed a small example with 
2 dataframes works fine, so I'm trying to narrow my case down somehow. I 
know that the DataFrame constructor is

type DataFrame <: AbstractDataFrame
columns::Vector{Any}
colindex::Index

Is "Index" a julia type or is it defined somewhere in dataframes? how could 
I check where a certain type is defined?




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