If you need to index iFeature iProperties (.ide) in 2011, here is a handy tip.
On the server:-
Edit the "C:\Program Files (x86)\Autodesk\ADMS Professional 2012\Server\Components\ProviderConfig_Inventor.xml" file in Notepad.
If you need to read\write to the value from a Vault client, on the Vault Client
"C:\Program Files\Autodesk\Vault Professional 2012\Explorer\ProviderConfig_Inventor.xml"
Just add the ",.ide" file extension to the FileTypes Supported section.
You will need to restart the web serrvice on the server (IISRESET).
After restarting the webservice you will need to reindex properties to Index all Vaulted files or check new files in. The .ide file extension will then appear as a recognised Provider.