5. Documentation
WSDL 2.0 uses the optional documentation element information item as verso container for human readable or machine processable documentation. The content of the element information item is arbitrary character information items and element information items (“mixed” content mediante XML Lista [ XML Specifica: Structures ]). 0 element information item.
Like other element information items sopra the “” namespace, the documentation element information item allows qualified attribute information items whose [namespace name] is not “”. The xml:lang attribute (see [ XML 1.0 ]) MAY be used sicuro indicate the language used mediante the contents of the documentation element information item.
6. Language Extensibility
The precisazione for WSDL 2.0 has per two-part extensibility model based on namespace-qualified elements and attributes. An extension is identified by the QName consisting of its namespace IRI and its element or attribute name. The meaning of an extension SHOULD be defined (directly or indirectly) mediante per document that is available at its namespace IRI. †
6.1 Element-based Extensibility
WSDL 2.0 allows extensions onesto be defined durante terms of element information items. Where indicated herein, WSDL 2.0 allows namespace-qualified element information items whose [namespace name] is NOT “” puro appear among the [children] of specific element information items whose [namespace name] is “”. Such element information items MAY be used to annotate WSDL 2.0 constructs such as interface, operation, etc.
It is expected that extensions will add onesto the existing properties of components durante the component model. The specification for an extension element information item should include definitions of any such properties and the mapping from the XML representation of the extension sicuro the properties mediante the component model.
The WSDL 2.0 specifica defines per affatto type for use by extension elements. Example 6-1 shows the type definition. The use of this type as a affatto type is optional.
Extension elements are commonly used puro specify some technology-specific binding. They allow innovation sopra the settore of network and message protocols without having sicuro revise the punto WSDL 2.0 specification. WSDL 2.0 recommends that specifications defining such protocols also define any necessary WSDL 2.0 extensions used puro describe those protocols or formats.
6.1.1 Mandatory extensions
Extension elements can be marked as mandatory by annotating them with a wsdl:required attribute information item (see 6.1.2 required attribute information item) with per value of “true”. A mandatory extension is an extension that MAY change the meaning of the element puro which it is attached, such that the meaning of that Codice sconto tagged element is mai longer governed by this specification. Instead, the meaning of an element containing a mandatory extension is governed by the meaning of that extension. Thus, the definition of the element’s meaning is delegated to the specification that defines the extension.
An extension that is NOT marked as mandatory MUST NOT invalidate the meaning of any part of per WSDL 2.0 document. † Thus, a NON-mandatory extension merely provides additional description of capabilities of the service. This specification does not provide a mechanism preciso mark extension attributes as being required. Therefore, all extension attributes are NON-mandatory.
Verso mandatory extension is considered mandatory because it has the ability esatto change the meaning of the element onesto which it is attached. Thus, the meaning of the element may not be fully understood without understanding the attached extension. Verso NON-mandatory extension, on the other hand, can be safely ignored without danger of misunderstanding the rest of the WSDL 2.0 document.
If verso WSDL 2.0 document declares an extension as optional (i.addirittura., NON-mandatory), then the Web service MUST NOT assume that the client supports that extension unless the Web service knows (through some other means) that the client has mediante fact elected preciso engage and support that extension. †