SAP DB Document Server 

SAP DB Document Server is a database instance type of the SAP DB database system.

In today’s information landscape, a large amount of data must be processed that does not have the typical format of a relational database, but is "unstructured" (such as videos, XML documents). SAP DB Document Server was developed on the basis of the SAP DB OLTP relational database system to ensure that as much of this unstructured data as possible can be processed outside the OLTP database. This improves the performance of the SAP DB OLTP database.

One application example is the SAP Content Server.