Hi Mukesh,
Sorry for the late response.Just been busy for a while.
i see you got confused a bit. though, i am glad you have found the answer.
Reagrding Document Type configuration
Goto Tcode DC10
or SPRO->Cross Applications Components->Document Management -> Control Data
under that you may find all the transactions required for configuring a document type.
Business Object is: DRAW. (goto SWO1 and search for DRAW for more details)
table : DRAW
DIR is nothing but the document Info Record, which acts as primary key for each document.
Creating a Document Type is also a simple task
<Please do not forget to configure the number ranges ,if required, before configuring the Doc Type>
Once you done with your Document Type Configuration, you can start use T Codes, CV01N, CV02N for craeting and editing documents.
DIR is a combination of what you see in the initial screen of CV01N
-Document Type
-Document number
-Document part
-Documet Version
Cheers!