Ewan Birney


Bio::Annotation - A generic object for annotations.


    use Bio::Annotation;
    use Bio::Annotation::DBLink;
    use Bio::Annotation::Comment;

    my $link = new Bio::Annotation::DBLink(-database => 'TSC',
                                     -primary_id => 'TSC0000030'
    my $ann = Bio::Annotation->new('-description'  => 'some description');

    my $comment = Bio::Annotation::Comment->new('-text' => 'Text of comment');
    my $comment2 = Bio::Annotation::Comment->new('-text' => 'Second comment');

    my $ref = Bio::Annotation::Reference->new( '-authors' => 'author line',
                                           '-title'   => 'title line',
                                           '-location'=> 'location line',
                                           '-start'   => 12);

    # description is a simple, one line description
    print "Description is ",$ann->description, "\n";

    foreach $comment ( $ann->each_Comment ) {
       # $comment is a Bio::Annotation::Comment object
       print "Comment: ", $comment->text(), "\n";

    foreach $link ( $ann->each_DBLink ) {
       # link is a Bio::Annotation::DBLink object
       print "Link to ",$link->primary_id, " in database", $link->database,"\n";    }

    foreach $ref ( $ann->each_Reference ) {
       # link is a Bio::Annotation::Reference object
       print "Reference title ", $ref->title , "\n";


The object represents generic biological annotation of an object. It has the ability to provide

    a brief, one line description
    free text comments
    links to other biological objects
    references to literature

It does not have the following abilities

    The basis (experimental/non experimental/homology) 
       of the annotation. This is considered to be part of
       the object which owns the annotation. This is 
       because the type of relevant basis is usually 
       dependent on the object

    The previous revisions of the object
       This should be a property of whatever database this
       object comes from


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

  bioperl-l@bioperl.org          - General discussion
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Reporting Bugs

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


AUTHOR - Ewan Birney

Email birney@ebi.ac.uk


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


 Title   : new
 Usage   : $annotation = Bio::Annotation->new( '-description' => 'a description line');
 Function: Makes a new Annotation object. The main thing 
           you will want to do with this is add comment objects and
           dblink objects, with calls like


 Example :
 Returns : a new Bio::Annotation Object
 Args    : hash, potentially with one field, -description


 Title   : description
 Usage   : $obj->description($newval)
 Example : 
 Returns : value of description
 Args    : newvalue (optional)


 Title   : add_gene_name
 Usage   : $self->add_gene_name($name1[,$name2,...])
 Function: adds a reference object
 Example :
 Returns : 
 Args    : a string, or a list of strings


 Title   : remove_gene_name
 Usage   : $self->remove_gene_name($index)
 Function: removes a particular gene name
 Example :
 Returns : 
 Args    : index of the name to remove


 Title   : each_gene_name
 Usage   : foreach $genename ( $self->each_gene_name() ) {
               print "seq has gene name $genename\n";
 Function: gets the array of gene names
 Example :
 Returns : an array of strings
 Args    :


 Title   : add_Reference
 Usage   : $self->add_Reference($ref1[,$ref2,...])
 Function: adds a reference object
 Example :
 Returns : 
 Args    : a Bio::Annotation::Reference or derived object


 Title   : remove_Reference
 Usage   : $self->remove_Reference($index)
 Function: removes a reference object
 Example :
 Returns : 
 Args    : index number from references array


 Title   : each_Reference
 Usage   : foreach $ref ( $self->each_Reference() )
 Function: gets an array of reference
 Example :
 Returns : an array of Bio::Annotation::Reference or derived objects
 Args    :


 Title   : add_Comment
 Usage   : $self->add_Comment($ref)
 Function: adds a Comment object
 Example :
 Returns : 
 Args    : a Bio::Annotation::Comment or derived object


 Title   : remove_Comment
 Usage   : $self->remove_Comment($index)
 Function: removes a comment object
 Example :
 Returns : 
 Args    : index number from comments array


 Title   : each_Comment
 Usage   : foreach $ref ( $self->each_Comment() )
 Function: gets an array of Comment of objects
 Example :
 Returns : an array of Bio::Annotation::Comment or derived objects
 Args    : none
 Title   : add_DBLink
 Usage   : $self->add_DBLink($ref)
 Function: adds a link object
 Example :
 Returns : 
 Args    : a Bio::Annotation::DBLink or derived object
 Title   : remove_DBLink
 Usage   : $self->remove_DBLink($index)
 Function: removes a DBLink object
 Example :
 Returns : 
 Args    : index number from links array
 Title   : each_DBLink
 Usage   : foreach $ref ( $self->each_DBlink() )
 Function: gets an array of DBlink of objects
 Example :
 Returns : an array of Bio::Annotation::DBlink or derived objects
 Args    :