Modules for reading, writing, and manipulating sequence features

 An I/O iterator subsystem for genomic sequence features.
 .
 Bio::FeatureIO is a handler module for the formats in the FeatureIO set (eg,
 Bio::FeatureIO::GFF). It is the officially sanctioned way of getting at the
 format objects, which most people should use.
 .
 The Bio::FeatureIO system can be thought of like biological file handles.
 They are attached to filehandles with smart formatting rules (eg, GFF format,
 or BED format) and can either read or write feature objects (Bio::SeqFeature
 objects, or more correctly, Bio::FeatureHolderI implementing objects, of
 which Bio::SeqFeature is one such object). If you want to know what to do
 with a Bio::SeqFeatureI object, read Bio::SeqFeatureI.
 .
 The idea is that you request a stream object for a particular format. All the
 stream objects have a notion of an internal file that is read from or written
 to. A particular FeatureIO object instance is configured for either input or
 output. A specific example of a stream object is the Bio::FeatureIO::gff
 object.