NAME

       Bio::Map::RelativeI - Interface for describing what a Position's coordiantes are
                             relative to.

SYNOPSIS

           # do not use this module directly
           # See Bio::Map::Relative for an example of
           # implementation.

DESCRIPTION

       A Relative object is used to describe what the co-ordinates (numerical(), start(), end())
       of a Position are relative to. By default they are implicitly assumed to be relative to
       the start of the map the Position is on.  But setting the relative() of a Position to one
       of these objects lets us define otherwise.

FEEDBACK

   Mailing Lists
       User feedback is an integral part of the evolution of this and other Bioperl modules. Send
       your comments and suggestions preferably to the Bioperl mailing list.  Your participation
       is much appreciated.

         bioperl-l@bioperl.org                  - General discussion
         http://bioperl.org/wiki/Mailing_lists  - About the mailing lists

   Support
       Please direct usage questions or support issues to the mailing list:

       bioperl-l@bioperl.org

       rather than to the module maintainer directly. Many experienced and reponsive experts will
       be able look at the problem and quickly address it. Please include a thorough description
       of the problem with code and data examples if at all possible.

   Reporting Bugs
       Report bugs to the Bioperl bug tracking system to help us keep track of the bugs and their
       resolution. Bug reports can be submitted via the web:

         https://redmine.open-bio.org/projects/bioperl/

AUTHOR - Sendu Bala

       Email bix@sendu.me.uk

APPENDIX

       The rest of the documentation details each of the object methods.  Internal methods are
       usually preceded with a _

   absolute_conversion
        Title   : absolute_conversion
        Usage   : my $absolute_coord = $relative->absolute_conversion($pos);
        Function: Convert the start co-ordinate of the supplied position into a number
                  relative to the start of its map.
        Returns : scalar number
        Args    : Bio::Map::PositionI object

   type
        Title   : type
        Usage   : my $type = $relative->type();
        Function: Get the type of thing we are relative to. The types correspond
                  to a method name, so the value of what we are relative to can
                  subsequently be found by $value = $relative->$type;

                  Note that type is set by the last method that was set, or during
                  new().

        Returns : the string 'map', 'element' or 'position', or undef
        Args    : none

   map
        Title   : map
        Usage   : my $int = $relative->map();
                  $relative->map($int);
        Function: Get/set the distance from the start of the map that the Position's
                  co-ordiantes are relative to.
        Returns : int
        Args    : none to get, OR
                  int to set; a value of 0 means relative to the start of the map.

   element
        Title   : element
        Usage   : my $element = $relative->element();
                  $relative->element($element);
        Function: Get/set the map element (Mappable) the Position is relative to. If
                  the Mappable has more than one Position on the Position's map, we
                  will be relative to the Mappable's first Position on the map.
        Returns : Bio::Map::MappableI
        Args    : none got get, OR
                  Bio::Map::MappableI to set

   position
        Title   : position
        Usage   : my $position = $relative->position();
                  $relative->position($position);
        Function: Get/set the Position your Position is relative to. Your Position
                  will be made relative to the start of this supplied Position. It
                  makes no difference what maps the Positions are on.
        Returns : Bio::Map::PositionI
        Args    : none got get, OR
                  Bio::Map::PositionI to set

   description
        Title   : description
        Usage   : my $description = $relative->description();
                  $relative->description($description);
        Function: Get/set a textual description of what this relative describes.
        Returns : string
        Args    : none to get, OR
                  string to set