Satoshi Nakamoto's Transaction Chain Diagram Hash Value In Satoshi Nakamoto's diagram: 



The line coming from transaction block 1 and going the the "Hash" label in transaction block 2 appears to represent the hash of the entire transaction block (Owner 1's Public Key + Hash + Owner 0's Signature) rather than represent the Hash value shown in transaction block 1 (in which case the line should (technically) be attached to the Hash block rather than to the border of the transaction block). Can anyone confirm exactly how the Hash value shown is computed and whether or not it contains the previous owner's signature?
Can anyone confirm exactly how the Hash value shown is computed


By taking the raw data for the transaction (as in the bytes that are sent over the wire for the transaction) and passing it through a hash function. For Bitcoin, that is SHA-256 double (SHA-256 done twice).


  and whether or not it contains the previous owner's signature? 


It depends. For simplicity's sake, you could say that it contains the previous owner's signature.

However, due to the activation of segwit, it does not always contain the signature. For segwit, the hash is not actually the hash of the entire transaction but rather parts of it that are non-segwit. Transactions that are non-segwit will have the signatures as part of the hashed data.