how to create classified content tree and link leaf to tags

[transistor]

how to create classified content tree and link leaf to tags(conditional)

[transistor]

for example, how to create sub category algorithms and data structures to category computer? and to link category algorithms and data structures to tags data structures?

[BetterRed]

Try this ==>> calibre User Manual: Managing subgroups of books, for example “genre”

[transistor]

i want to create classification tree first, and the join tags conditionally to leaves automatically.

[BetterRed]

Calibre creates its categories (Authors, Publishers Tags, custom column categories etc) as they are used. So you'll have to create dummy books with the required classification hierarchies

I don't know what you mean by joining tags conditionally to leaves automatically

Conditioned on what criteria? Automated on what knowledge?

If you drag a book onto a category in the left sidebar then the book will have that category assigned to its metadata.

BR

[Adoby]

You can also just add a custom column to the calibre library. Then put the classification there. Then, when you save books to disc, you can use the classification to create subfolders accordingly. In however many levels you desire. The only problem is that each book then only can have one single classification.

If you instead access the books from inside calibre you can use the search functions and possibly also virtual libraries and have books belong to any number of classifications.

So for instance a book with tags algorithms, computers and data structures can be simultaneously classified as part of:

Books on computers
Books on algoritms
Books on data structures.
Books on computers, algorithms and data structures
Books on algorithms and data structures
Books on data structures and algorithms

And so on. Whatever you find meaningful and want to search for.

I assume that by "leaf" you mean "book".

[transistor]

assume there are books with tags module theory and linear algebra simultaneously.
there is a tree with leaf abstract algebra
i want these book will automatically be listed under that leaf

[itimpi]

Originally Posted by transistor

assume there are books with tags module theory and linear algebra simultaneously.
there is a tree with leaf abstract algebra
i want these book will automatically be listed under that leaf

The simplest way to do this under Calibre would be for both books to have a tag ‘algebra’ as well as tags ‘module theory’ and ‘linear algebra’ respectively. This tends to be the most flexible approach that I think many Calibre users end up adopting as it is the easiest.

The other way would be to make use of the heirarchical tags feature and have tags like ‘algebra.module theory’ and ‘algebra.linear algebra’. Using this approach both books would appear in the tag browser under the ‘algebra’ category with sub-categories of ‘module theory’ and ‘linear algebra’.

[Adoby]

Originally Posted by transistor

assume there are books with tags module theory and linear algebra simultaneously.
there is a tree with leaf abstract algebra
i want these book will automatically be listed under that leaf

How do you map between "abstract algebra" and "module theory"+"linear algebra"? Or more general between Classification(n) and Tag(i) AND Tag(j). (And perhaps also OR and NOT.)

Can a book have more than one classification?

One calibre way to provide the mapping is to create a saved search named "abstract algebra" and in the search include the search terms ("module theory" AND "linear algebra"), if that is the intended mapping. Possibly add other combinations of tags as well to the search. This saved search with the mapping can then be used to create a virtual library, possibly with a visible tag to quickly switch to list only those books. Perhaps not the best way if you have a lot of mappings, but might be convenient for some major high level classifications like "math", "programming" and "linguistics".

You would have to prepare each mapping (search) manually. At least I don't think there is a way to create searches automatically from some form of list with mappings.

Much easier, as has been suggested above, is to tag the book with the correct classification directly. If a book has tags "module theory" and "linear algebra" add the tag "abstract algebra", possibly in a custom column called #classification. This can be done in bulk by performing searches and tag all found books for each search with the correct classification. And later, when adding new books, fill in the correct classification while you normalize other metadata.

[BetterRed]

@transistor - have a look at User Categories, see ==>> Tag browser

They provide the means to associate a set of individual category items (Authors, Publishers, Tags etc) into arbitrary groups. So, tags module theory and linear algebra would be members of the algebra user category, when you tagged a book with module theory it would appear in the algebra user category automatically.

You define them via this:



And there is a User Category optional plugin, it makes maintenance of them easier.

BR