WSDL 1.1 Framework and Extensions

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∟WSDL 1.1 Framework and Extensions

This section describes WSDL 1.1 core framework and 4 extensions: SOAP 1.1, HTTP, MIME and SOAP 1.2

The original WSDL 1.1 language specification (http://www.w3.org/TR/wsdl) published in 2001 was divided into 4 parts: 1 core and 3 extensions:

Core, represented by URI: http://schemas.xmlsoap.org/wsdl/ - WSDL core provides high level language components to define Web services.

SOAP Extension, represented by URI: http://schemas.xmlsoap.org/wsdl/soap/ - SOAP Extension provides detail level language components to support SOAP 1.1 protocol in these areas:

An indication that a binding is bound to the SOAP protocol.
A way of specifying an address for a SOAP endpoint.
The URI for the SOAPAction HTTP header for the HTTP binding of SOAP.
A list of definitions for Headers that are transmitted as part of the SOAP Envelope.

HTTP Extension, represented by URI: http://schemas.xmlsoap.org/wsdl/http/ - SOAP Extension provides detail level language components to support HTTP protocol in these areas:

An indication that a binding uses HTTP GET or POST.
An address for the port.
A relative address for each operation (relative to the base address defined by the port).

MIME Extension, represented by URI: http://schemas.xmlsoap.org/wsdl/mime/ - SOAP Extension provides detail level language components to support MIME protocol in these areas:

Binding of input/output messages in some MIME formats.
multipart/related is supported.
text/xml and text/html are supported.
application/x-www-form-urlencoded is supported.
image/gif and image/jpeg are supported.

In 2006, another extension was added: "WSDL 1.1 Binding Extension for SOAP 1.2" (http://schemas.xmlsoap.org/wsdl/soap12/WSDL11SOAP12.pdf).

SOAP 1.2 Extension, represented by URI: http://schemas.xmlsoap.org/wsdl/soap12/ - SOAP Extension provides detail level language components to support SOAP 1.2 protocol in these areas:

Indicate that a binding is bound to the SOAP 1.2 protocol.
Specify an address for a SOAP endpoint.
Specify the URI for the action parameter of the application/soap+xml Content-Type HTTP header value [SOAP Media] for the HTTP binding of SOAP.
Define Headers that are transmitted as part of the SOAP Envelope.
Indicate whether an action parameter is required by a SOAP 1.2 endpoint.