[GeoNetwork-users] geodata colaboration platfom (lock data and versioning)

Hi i would like to use Geonetwork as a kind of SDI. I would like to enable
people (working groups) to share, maintain and change the data.

My question is:
- is there a way to make a kind of history or versioning?
- is there a possibility to lock or check out datasets
- what is the best way to store and share big data? is there a better
solution than a FTP HTTP Server?

thanks in advance
paul
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