1 6/29/83 forum request: previousref, pref
 2 
 3 Syntax:  pref {trans_spec} {-control_args}
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 5 
 6 Syntax as an active request:  [pref {trans_spec} {-control_args}]
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 8 
 9 Function:
10 Prints or returns the transaction index of the previous transaction in the
11 same chain as the specified transaction, or in the same chain as the
12 current transaction if no trans_spec is given.
13 
14 
15 Arguments:
16 trans_spec
17    is the transaction for which the previousref is desired.
18 
19 
20 Control arguments:
21 -include_deleted, -idl
22    print or return the index of the previous transaction in the chain even
23    if it is deleted.
24 -only_deleted, -odl
25    print or return the index of the previous deleted transaction in the chain.
26 -only_non_deleted, -ondl
27    print or return the index of the previous non-deleted transaction in the.
28    chain. (Default)