Object repository is used to store all the objects in the

application being tested.2 types of oject repositoy per

action and shared. In shared repository only one

centralised repository for all the tests. where as in per

action.for each test a separate per action repostory is

created.

shared rep requires less memory when comapare with per 
action rep.

Local Object Repository         Shared Object Repository 
      (LOR)                           (SOR)
1. Every action has its          All actions use same OR 
own OR. 
2. LOR cannot be accessed as    SOR are accessible          
separate file.                  as separate file. 
3. Modify objects using         Modify objects using 
Object Repository Window.       Object Repository Manager.
4. Big application its better.  Small application its better

the two types of object repository is shared and per action.

if a tester wants to use reusable actions shared object 
repository can be used...shared object repository usage 
helps to minimise space...others can also access   the 
repository

peraction repository is specific to the action which it is 
associated with.it cannot be used across scripts