Note (Sorry for question because i'm new in Odoo)

how to declear osv.osv and osv.osv_memory and osv.TransientModel
in Odoo 10.

some developer use old and new style with combine.
i want to know complete list of new development by Odoo 10 as well compare others

can any one tell me
how to deal with osv.osv_memory and osv.osv in new api ???
just like Odoo replace __openerp__.py to __manifest__.py as well as import openerp to import Odoo
i want to know all list of replace by Odoo in new style api developement for odoo 10
Explain complete list...
for Example
1)    __openerp__.py   replace by __manifest__.py

2)    osv.osv_memory replace by osv.TransitModel
3)    osv.osv                replace by  i don't know

)
if i'm wrong please correct list and add more ....