kk25 wrote
1. How many users are allowed to use DokuWiki?
There is no maximum limit.
kk25 wrote
2. Is a versioning of the pages or the files possible and can I see who is the author of the different versions?
Yes, that is a standard feature of DokuWiki.
kk25 wrote
3. What is maximum size of attachments?
4. How many pages can I create on the wiki? Or how many space for storing pages and attatchments is available on DokuWiki?
The only limit is your file system.