Spotlight � Apple’s new metadata search framework introduced in OSXTiger.
MetaDataWithSpotLight allows applications to define arbitrary metadata for their documents and search through them. It basically makes really advanced searching feasible on all file types, and will allow developers easily to implement fast searching into their apps.
Public documentation is located at: [http://developer.apple.com/macosx/spotlight.html]
*The feel-good public marketing campaign: [http://www.apple.com/macosx/features/spotlight/] *Great How-to http://www.macdevcenter.com/pub/a/mac/2005/07/15/spotlight.html *How to stop Spotlight messing with your files behind your back: http://developer.apple.com/qa/qa2006/qa1497.html
To force Spotlight to index a folder, just use this command:
mdimport -f /path/to/folder/you/would/like/to/index
Searching with grep & Spotlight’s kMDItemDisplayName: http://textsnippets.com/posts/show/364