how to process segwit blocks?

[jl777]

I see a lot of marketing oriented info about segwit...
Is there any technical reference as to how it changes the protocol and blockchain data?
and how to validate these segwit tx

do nodes that ignore the segwit data get protection against double spends?

 

[jl777]

https://github.com/bitcoin/bips/blob/master/bip-0141.mediawiki

just a few small changes

 

[Chronos]

Thanks for the link. Good overview of SegWit.