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And I just take in account the actual results that Calibre give when I fill in the tags and create the VLs...
I did a minimal(?) test. Here are the results:
The minimal library contains four books with the following titles and tags:
"Grapes and Olives": Grapes, Olives
"Apples and Oranges": Apples, Oranges
"Apples and Lemons": Apples, Lemons
"Olives and Oranges": Olives, Oranges
There are three VLs with the following names and searches:
"NOT A AND NOT B": ((not tags:"=Apples") AND (not tags:"=Oranges"))
"NOT ( A OR B )": not (tags:"=Apples" OR tags:"=Oranges")
"NOT ( A AND B )": not (tags:"=Apples" AND tags:"=Oranges")
Results:
The VL "NOT A AND NOT B" contains one book: "Grapes and Olives"
The VL "NOT ( A OR B )" contains one book: "Grapes and Olives"
The VL "NOT ( A AND B )" contains all books EXCEPT the book "Apples and Oranges".
Comments:
The two VLs "NOT A AND NOT B" and "NOT ( A OR B )" seem to be functionally identical, and either can be used as the "Standard" VL in the OP.
The VL "NOT ( A AND B )" give the result you seem to expect from the VL "NOT A AND NOT B"?
Is there a bug in Calibre or do I do something wrong when I create the VLs or the tags?
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