The
.Nm
library provides a flexible interface for reading and writing
-streaming archive files such as tar and cpio.
+archives in various formats such as tar and cpio.
+.Nm
+also supports reading and writing archives compressed using
+various compression filters such as gzip and bzip2.
The library is inherently stream-oriented; readers serially iterate through
the archive, writers serially add things to the archive.
In particular, note that there is currently no built-in support for