GO::Model::Relationship(3pm)				User Contributed Perl Documentation			      GO::Model::Relationship(3pm)

NAME

	 GO::Model::Relationship - relationship between two terms

SYNOPSIS

DESCRIPTION

       a relationship between two GO::Model::Terms

       relationships can be thought of as statements or sentences of the form

	 SUBJECT-TERM PREDICATE OBJECT-TERM

       for example,

	 "dog" IS_A "animal"

	 "G-Protein coupled receptor" IS_A "transmembrane receptor"

       Statements have a subject (i.e. the subject of the sentence/statement), a predicate/relationship-type and an object (i.e. the object of the
       sentence/statement)

       Relationships can also be seen as arcs in a directed graph, with the subject being equivalent to the child, and the object equivalent to
       the parent. The arc is labeled with the predicate/relationship-type.

       A Relationship object currently does not contain an actual pointer to a GO::Model::Term object. Instead it stores the ID of that term. This
       is intended to be used in conjunction with the Graph object, or with the database.

   subject_acc
	Title	: subject_acc
	Usage	: $obj->subject_acc($newid)
	Usage	: $currid = $obj->subject_acc()
	Synonyms: subj_acc, acc2, child_acc
	Function: gets or sets the identifier for the child/subject term
	Example :
	Returns : value of subject_acc (string)
	Args	: on set, new value (string)

       All Relationships can be thought of "subject-predicate-object" statements. The statement is *about* the subject, and states something about
       the relationship *to* the object.

       For example, the if we have a Relationship:

	 cell
	   ^
	   |
	   | [part_of]
	   |
	cell nucleus

       This is a statement about cell nuclei in general, so "cell nucleus" is the subject (sometimes called the child node). The Relationship
       tells us that all cell nuclei are part_of some cell, so the object of the relationship (sometimes called the parent node) is "cell"

   object_acc
	Title	: object_acc
	Usage	: $obj->object_acc($newid)
	Usage	: $currid = $obj->object_acc()
	Synonyms: obj_acc, acc1, parent_acc
	Function: gets or sets the identifier for the parent/object term
	Example :
	Returns : value of object_acc (string)
	Args	: on set, new value (string)
	See Also: subj_acc

   type
	Title	: type
	Usage	: $obj->type($newval)
	Usage	: $currval = $obj->type()
	Synonyms:
	Function: gets or sets the relationship type (a string)
	Example :
	Returns : value of type (string)
	Args	: on set, new value (string)

       Currently any string is allowed; in future the type string may be constrained to come from a controlled vocabulary of relationship types

perl v5.14.2							    2013-02-07					      GO::Model::Relationship(3pm)