Spotlight is a fast, as-you-type system-wide search found in Mac OS X 10.4. Using a metadata search engine, Spotlight finds almost anything on the computer, including documents, pictures, music, System Preference panes, as well as specific words in documents and PDFs. Searches can also be modified with date created, date modified, size, type and many more attributes.
Spotlight for Mac OS X Tiger lets you blaze through your files and applications and see results as soon as you type the very first letter.
When you search via Spotlight, youre actually accessing a comprehensive, constantly updated index that sees all the metadata inside supported files the what, when and who of every piece of information saved on your Mac including the kind of content, the author, edit history, format, size and many more details.
Spotlight returns documents she authored or edited, images she emailed, messages she wrote (and messages you sent to her) and her contact information.
The Spotlight Store is a file system-level database that holds all of the meta-data attributes about the files, as well as an index of their contents, on a file system.
Since the core of Spotlight lives at the very lowest levels of the operating system, it is only natural that there are some command-line tools for power-users to work with file system meta-data and perform queries.
And, Apple is the first to bring you this kind of functionality built into the operating system.