Hello,

i´ve searched this forum, but couldnt find a solution for my problem.

I want to associate 2 categories for a item.

For example i have 2 categories: Persons and Companies.

So i create the category companies with f.e. Microsoft and Apple.
Now i want to create a person database. I create Michael and i want to associate him with Apple.
In the item from Michael i see the Field Company: Apple (perfectly with a link, so i get to directly to the apple item)
And in die Apple item there is a list with all persons who a working at apple. (ans once again with a link on the name so i move to the item from "Michael"

I hope you can understand my problem, my english is a bit rusty

Your English is perfectly fine.
K2 only supports one category, you can use extensions to have multiple categories but I don't think this is a good idea.

I would personally create the persons as categories and the companies as tags.