XML namespace
WSDL 1.1
The service-description namespace for SOAP web services, and still the version almost every deployed WSDL uses — 2.0 never displaced it.
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/"WSDL 1.1 was published as a W3C Note rather than a Recommendation, and WSDL 2.0 — which uses a different namespace and renames portType to interface — never displaced it in practice.
A WSDL document normally declares several namespaces at once: this one for the description, XMLSchema for the inline types, the SOAP binding namespace, and a target namespace for the service's own messages.
- URI
http://schemas.xmlsoap.org/wsdl/- Prefix
wsdl- Elements
definitionstypesmessageportTypebindingserviceport
Specification: WSDL 1.1 note
Formats that use it
SOAP envelope
<Envelope>The message envelope for SOAP web services — still the backbone of banking, logistics and telecom, with its version carried by the namespace URI.
WSDL
<definitions>The machine-readable contract for a SOAP service: operations, messages, bindings and endpoints, with an inline XSD describing its own types.
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