Plan server-side data connections needed for form templates (Office Forms Server)

In this article:

- Scenarios for the use of data connections
- Database data connection
- HTTP post data connection
- SharePoint library submit data connection
- SharePoint list data connection
- Web service data connection
- XML file data connection

A data connection is a dynamic link between a form template and a data source that stores or provides data for the form template. A form template must have one primary data connection, called the main data connection, and it can optionally have one or more secondary data connections. The main data connection defines the main data source of the form template, which is the XML schema that determines how data is stored. The one main data connection allowed on a form template is created automatically when you create the template. You can create as many secondary data connections as you like when you design a form template.

http://technet.microsoft.com/en-us/library/cc197279.aspx