Hello Together
We want give our Partners a Page (Not a Space), in which they can create their own "child"-pages for our customers. But without permission to create general pages or modify our pages.
Background:
We want have A special User can only Create and Edit Pages which are Child of one Page.
For our Partner-Developers we want give access to create their own Knowledge Articles, but without access to change our Articles.
For this we have a space called "Servicedesk" (Knowledgebase of our Jira Servicedesk) which is visible to all users.
In this Space i want add one "Parent"-Page for each Partner or Software-Name.
And for this Page we want give Access to modify and create Childpages of this to our partners.
But each other Page they can not Edit / Create.
My solution:
We give Access to Create and Modify Pages on this Space.
But set the Page-Restrictions for each Page (Only View and Edit only for us)
For the Page which the Partner should have access, we add him as "Edit" too)
But this is a little bit complex, because we have over 200 pages, which we have to set the restrictions first 
And for each new "normal" page we have to add the same restrictions.
Question:
Maybe someone know a better solution to give Create/modify Access to Page with Childrens?
Or maybe know a similiar solution like this?
Thanks
Martin