Changing the Document Class for a set of documents after a perticular date

We don't have any feature to change the document class of a document. Since the class is one of the keys that uniquely identifies a document, and many related tables also have them, it's sort of a messy thing.

Some customers have developed customizations that runs around and changes the class in a lot of table. If this is important to you you can also create one. Or develop a script, or even a custom event that does the work. In a way, it's not hard, but you need to identify all tables that you have data in and which has DocClass as a key or another attribute. Things becomes harder if you have also printed the document class into the document files...

If you don't have too many, one workaround is to use the Copy Document Title command, and change the class in the copy, then remove the old document.

Good luck!
 

Thanks @Mathias Dahl 

I was just speaking to my colleague and he only claified what excatly he wanted, sorry - this is the real requeirement:

In one Doc Class, we have quite a lot of Docs, approximately 3 TB. So his plan is to create a new Document Repocitory and move those docs into it without changing the Doc Class (or maybe after creating a new class - whatever is easier) However, he plans to do it for only a part of all those docs in the original class. So the real requirement is changing the repocitory only for the docs created (or checked in) after a perticular date in that class. Do you think that’s possible? Do you recommend we create a case for IFS Support to discuss the complete requirement? 

Thanks alot Matthias

Thanks @Mathias Dahl