Hi,
On 11 Dec 2015 at 11:20:55, KirbY ZhoU (kirbyzhou@gmail.com(mailto:kirbyzhou@gmail.com))
wrote:
 Import and Export XAR will lost tree hierarchy?
 I used to have a multi level tree hierarchy inside my wiki space.
 But, when I import it, all the pages are flatten as the direct children of the space
WebHome.
 I use the default export tools to export a large 100M+ xar file under Xwiki-6.3
 I use "Admin Tools" application to import large xar file under Xwiki-7.3.
 Is it incompatible with tree hierarchy? 
This is because starting with 7.2 we’ve introduced the concept of nested spaces,
see 
http://platform.xwiki.org/xwiki/bin/view/Features/ContentOrganization
In doing so, we’ve deprecated the parent/child relationship but you can still turn it on: 
http://www.xwiki.org/xwiki/bin/view/ReleaseNotes/ReleaseNotesXWiki72#HHidin…
Thanks
-Vincent