A Mac Spotlight Importer for Adobe Lightroom Catalogs. Allows users to search for filenames inside catalogs from within the Spotlight window.

The Adobe Lightroom .lrcat catalog files are sqlite databases. The catalog files do not store the picture files themselves but a reference to them on disk. Executing the following query returns the filenames that are stored in the catalog file:

SELECT originalFilename FROM AgLibraryFile

Apple provides a mechanism for developers to create custom importers for lesser known or custom file types. The documentation from Apple can be found here.

LSI uses the FMDB Sqlite wrapper for Objective-C.