MetaFS allows users to access information
about their files (such as MP3 tags or JPEG
EXIF tags) easily and consistently using
extended attributes. It also allows them to
perform fast searches using this
information. It can be easily extended by
writing plugins to support new types of
metadata and uses the FUSE library to act as
a layer between user programs and the
filesystem, which allows indexes to be kept up-
to-date in realtime, and eliminates the need
for a specialized metadata API.