Quote:
Originally Posted by ownedbycats
Yes, it can. Here's an entry called "Test.enum" (for enumerated) after the column was set to hierarchical in preferences > look & feel > tag browser.
Attachment 199848 |
So then this might be an option for delineating a hierarchical controlled vocabulary. The only caveat is that values cannot contain a comma. (If this is important to you then you could use some other character in its place which looks similar but will not be treated by Calibre as a comma. For example (but you could use other choices), a turned comma: ⸲)
I've just tested and confirmed that columns with a fixed set of permitted values can have that set of permitted values changed after creation. (This would seem to be important for something as broad as a Genre category, which I assume would occasionally throw up new genres that were not initially considered.)