entry / asset url integrity check Is there any mechanism in Craft (or a plugin) which protects entries or assets from being deleted, if they are used in an asset / entry field used in an entrytype, global, ...? 

Or is there a way to show how many relations an asset or an entry has? (I know some CMSs which show you the amount of "inbound" links to the assets and pages).

Thanks!
I just saw this. Consider this plug-in:
https://github.com/born05/craft-assetusage