IBM BPM, V8.0.1, All platforms > Authoring services in Integration Designer > Defining and transforming data > Create and mapping interfaces > Create interfaces
Binding style
The binding style specifies how a service is bound to a messaging protocol, particularly the SOAP protocol. Binding style is also referred to as the WSDL style or encoding style.
There are several binding styles, however, they are divided
into two categories. Document style, which sends the entire XML document
in a message, and Remote Procedure Call (RPC), which sends part of a message. These categories are themselves divided into subcategories, which are explained in detail in 
Which WSDL style should I use?. There are tradeoffs to each one. The default selection in the interface editor, document literal wrapped, is sufficient for most uses. However, if you are using an attachment in a business object, document literal
non-wrapped must be used.
If you bring an interface into the interface editor and another binding style has been used then the editor will leave the binding style as it is. This feature is known as toleration. The following binding styles are supported by the interface editor:
| Binding style | Interface editor support |
|---|---|
| Document literal wrapped | Default |
| Document literal non-wrapped (used with attachments) | Can be selected from the interface editor |
| Remote Procedure Call (RPC) | Tolerated if WSDL has been imported |
| Unknown | Tolerated if WSDL has been imported |