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many-to-many mapping of UI objects
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relationships may be reciprocal
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Relation types:
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LABEL_FOR / LABELLED_BY
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CONTROLLER_FOR / CONTROLLED_BY
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MEMBER_OF
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NODE_CHILD_OF
/* This code snippet associates a label with a text entry field */
GtkWidget *gtk_entry, *gtk_label;
AtkObject *atk_entry, *atk_label;
Atkrelation *relation;
AtkRelationSet *set;
...
atk_entry = gtk_widget_get_accessible (gtk_entry);
atk_label = gtk_widget_get_accessible (gtk_label);
relation = atk_relation_new (&atk_label, 1, ATK_RELATION_LABELLED_BY);
set = atk_object_ref_relation_set (atk_entry);
atk_relation_set_add (set, relation);
...
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