I'm looking for a way to organize my collection of pdfs (books, papers, some articles). I'd like something open source and portable, that supports searching, tags, categories...
could you expand on this? Do you know of a tool that keeps the source files, or are you describing only a cataloging system like e.g. how to set up a spreadsheet?
then ISBN, then title.
collections like multivolume series, or encyclopedia sets are collated and treated like one item on stack