L<DBIx::Class::Validation> - Validate all data before submitting to your database.
+L<DBIx::Class::Positional> - Modify the position of objects in an ordered list.
+
+L<DBIx::Class::Tree::AdjacencyList> - Manage a tree of data using the common adjacency list model.
+
+L<DBIx::Class::Tree::NestedSet> - Manage a positional tree of data using the nested set model.
+
=head2 Core
These are the components that all, or nearly all, people will use