[DaltonST]

@DolusBonus:

LC comes preloaded for DDC mappings to LC Genre, so it works out-of-the-box if you use DDCs. Just run it via the menu.

If any DDCs are missing for whatever reason, you can add them using the template .csv file for DDC mappings attached to the Original Post.

If you want to change any DDC mappings, you can change them in that same .csv file.

If you want to use LCC mappings, there is a template file for LCC attached to the OP.

Since LC automatically derives both DDC and LCC from ISBNs simultaneously, you might as well tell it to update both Custom Columns while it has the data anyway.

Personally, I use DDC mappings to derive LC Genre for books that have a DDC. If not, and if they have a LCC, I use LCC mappings. I just flip the switch in Configuration to swap from using DDC to using LCC for the mappings to LC Genre.

So, my books have the following classification metadata: Tags; Genres (via my CALM and Q&S plug-ins); DDC; LCC; LC Genres (using DDC mappings if they have a DDC, and LCC mappings if not and if they do have a LCC); and LCEAD.

Generally speaking, most factual (non-fiction) books have a LCC, and most fiction books do not have a LCC. Many exceptions to that rule of thumb, of course.

Obviously, you can select each type of Fiction (Science, Romance, Thrillers, etc.) and use Bulk Metadata Edit to set missing DDC and LCC values as appropriate. Afterwards, run the LC Genre update menu item.

Again, LC comes preloaded for DDC mappings to LC Genre, so it works out-of-the-box if you use DDCs. After you have set your LC Configuration Options, just run it via the menu, which is attached below. Note the sub-menu ToolTip.


Good luck.


DaltonST