DB_DataObject 2 joins to same table

Hi!, Hi have a tables relationship like the 'Automatic Table Linking and Joins' example at PEAR DB_DAtaObject Documentation. One table that have two columns that links to the same table and the same column. For example: table USER user_id user_name user_firstcar user_secondcar table CAR car_id car_model car_color on mydatabase.links.ini [USER] user_firscar=CAR:car_id user_secondcar=CAR:car_id In the PEAR doc example I see: ... $car->use = 'first'; ... I have been looking for the 'use' attribute in doc of DB_DAtaObject and DB and not have seen it. I understand that in my code I should type: $car->use='user_firstcar' for the first join and $car2->use='user_secondcar' for the first join and the selectAs, etc. I have tried it and not work, always see the first instance of car. My code is here: $mo=new MAGATZEM(); $mo->use='MAGATZEM_ORIGEN'; $md=new MAGATZEM(); $md->use='MAGATZEM_DESTI'; $dob->joinAdd($mo); $dob->selectAs($mo,'mo_%s'); $dob->joinAdd($md,'','md'); $dob->selectAs($md,'md_%s'); $dob->find(); Thanks about any help.