How to create dependent object

Hi Experts,

I have create zbol root object( say zbol 1 ) with its search query object and working fine .

My requirement is to add another zbol( say zbol2 ) object as dependent object in my newly created Root object(zbol1). so that i can find zbol2 entity by  using get_releated_entity method or create/modify/delete entity based on zbol1 entity.

some how i come to know to use object table and model table concepts to achieve this. but i dont find any link or document which clearly help me to achieve this requirement.

Please help me out.

Thanks

Imran.