Link database ini file

Hi, I've installed PEAR corectly and this is my dataobject/schema directory appearence:

example.ini with this text:

[DB_DataObject]
database = mysql://root:root@localhost/example
schema_location = /dataobjects/schema/
class_location = /dataobjects/
require_prefix = /dataobjects/
class_prefix = DataObjects_
extends_location = DB/DataObject.php
extends = DB_DataObject

and example.links.ini with this text:
[canal]
idCanal = canalItem:idCanal

[item]
idItem = canalItem:idItem
idTipoItem = tipoItem:idTipoItem

[categoriaNoticia]
idNoticiaWAP = notociaWAP:idNoticiaWAP
idCategoriaWAP = categoriaWAP:idCategoriaWAP


[canalWAPCategoria]
idCanalWAP = canalWAP:idCanalWAP
idCategoriaWAP = categoriaWAP:idCategoriaWAP

I would like to know, how can I see the relationhship that PEAR is using (something like the phpinfo page t see the server configuration)between the object that I performed, because I can't make a joinAdd() function and I think that is directly related with it.

Must I put a line in the example.ini like this
links_{example} = /dataobjects/schema/ ? I've tried with it, but it didn't work.

Thanks.