Checkpoints of any testing tools are used to compare ER and 
AR.QTP contains some checkpoints as following
1- Standard checkpoint(this ckeck point is used o check the 
object properties and logical name).
2- Image checkpoint(this is used to check the value of an 
image in your application or webpage).
3- Bitmap checkpoin(this is used to check image files pixel-
by-pixel,by using this check point we can check that the 
map zoom in correctly).
4- Table check point(this is used to check the containts 
present in the table).
5- Text checkpoint(this is used to check the staic text 
containts only).
6- Test area Checkpoint(checks that a text string is 
displayed within a defined area in a Window application, 
according to specified criteria.)
7- Accessibility Checkpoints(identifies areas of  your web 
site.)
8- Page checkpoin(checks the characrestics of a Web page.)
9- Data base Checkpoint(checks the containts of a database 
accessed by your application).
10- XML Checkpoint(checks the data content of XML documents 
in XML files or XML documents in web pages and frames).