problem：Why do I not have subcategories when importing BibLaTex format file

1galaxy

I not have subcategories when importing BibLaTex format bibliography, but I do have subcategories when importing from RDF format. And I'm sure there are subcategories in the original library.
I have tried zotero7 and zotero6.

How can I solve this problem？
Thanks!

adamsmith

You mean collections? Biblatex doesn't have a concept of collection or anything similar. What tool are you importing from?

1galaxy

I mean that when the BibLaTex file exported from zotero on another device was imported into my zotero, the items in it were not categorized.

adamsmith

right. BibLaTeX doesn't have collections (which I assume you mean by 'categorized') so they get lost when exporting and re-importing.

bwiernik

Just to be sure — if you are transferring your own library from one computer to another, do not use export/import. Instead, see https://www.zotero.org/support/kb/transferring_a_library