Ghostable and GhostableInLibraqry and UnGhostable ?

When a site is provisioned SharePoint doesn't really copy the pages for that site (i.e. default.aspx,setting.aspx,viewlsts.aspx) into a new database table or directory. These files exist only once on each of the front end web servers(12hive/14hive). Instead SharePoint, creates a reference to those files in the database tables that define the new site. This is called "ghosting".which improves the performance of a site.i.e ghosted pages are filesystem pages.


Unghosting means that pages which are present in a database and supported the customization.

GhostableInLibrary however specifies that the file be cached as part of a list whose base type is Document Library and that you can work with the file as you would with any other file in the library (check-in, check-out, version history)

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