Fix Spotlight continually re-indexing your hard drive | MacIssues http://www.macissues.com/2014/07/07/fix-spotlight-continually-re-indexing-your-hard-drive/#more-1438
Mac Dev Center: Spotlight Query Programming Guide: Query Expression Syntax http://developer.apple.com/mac/library/documentation/Carbon/Conceptual/SpotlightQuery/Concepts/QueryFormat.html#//apple_ref/doc/uid/TP40001849