[iostrym]

I would like that when a pdf is added in calibre, a specific metadata from PDF is read and added in ISBN metada in calibre.
Like it is done for epub where ISBN epub is paste in ISBN calibre metadata. In calibre I don't think this could be configured...
I'm using ISBN as a version number to trace my evolution in PDF or epub. But maybe there is a better solution.

By the way, what is the rule for Calibre for currently import pdf metadata ?

I notice that :

first word of pdf subjet + words in pdf keywords are used as calibre TAG. It is quite strange that first word of pdf subject is taken like that. Also I don't succeed to put several word in pdf "keyword" because there are seen as only one keyword. Even with "," or ";" or " "

ex :
toto, titi
toto; titi
etc... each time the calibre corresponding tag is "toto, titi" or "toto; titi"

[EDIT] My fault, it is my pdf editor (pdf x change viewer) that add " " before and after all keywords... don't know why.

is the official calibre metadata behavior when importing a pdf documented somewhere ?

thanks a lot for your help