To facilitate the global cross-referencing of mime-types, file extensions, and
"user-friendly" file type descriptions, PhoenixOS maintains a table associating
the three. API calls are provided to perform the following tasks:

  Add Type Record (given extension(s), mime-type, and description)
  Change Record Type (given extension)
  Change Record Description (given mime-type)
  Delete Type Record (given mime-type)
  Lookup Mime Type (given extension)
  Lookup Description (given extension)
  Lookup Description (given mime-type)
  Lookup Extension(s) (given mime-type); returns comma-delimited list of extensions
  Find First / Find Next Mime Type

Each record is able to hold any number of file extensions (of any length), a
single mime-type (of any length), and a file description (of any length).
File extensions are defined as text matching any characters after the last
dot in a filename. For example, the filename "example.html" would have an
extension of "html". File extensions are case sensitive, however case is not
sensitive when matching mime types.