Working with the Call Flow Editor > Getting Familiar with Nodes to Build Applications
	Getting Familiar with Nodes to Build Applications

Dialog Designer offers three types of nodes to build projects. All three types of nodes are available from the Call Flow Editor palette. They are grouped into two or three sets, depending on whether module nodes have been imported into the Dialog Designer workbench.

The following bullets introduce the different types of nodes used to build speech applications. These node types are described in greater detail in the subsequent sections:

• Templates (Composite Nodes) - Composite Nodes contain preset functionality and options, which are used as templates. These nodes are easier to use than the Application Items (basic nodes), but they are also intended to be more limited in scope.

• Application Items (Basic Nodes) - Simpler, more generic nodes. These nodes offer greater flexibility than the other two types in many ways. However, to use effectively, they also require a greater knowledge of programming concepts and terminology.

• Module Nodes - Available only if you have imported speech project modules into the Dialog Designer workbench. These modules can be Dialog Designer projects, Nuance Open Speech Dialog Module (OSDM) modules, or any other Web application that can invoked as a VXML <subdialog>. Because these are custom-built modules, they can vary widely in simplicity or complexity and flexibility.

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