It will also help facilitate future automatic processing by WSDL 2

If verso Web service requires per client puro follow a particular convention that is likely sicuro be automatable in WSDL 2.0 toolkits, then that convention SHOULD be indicated in the WSDL 2.0 document as verso wsdl:required extension, rather than just being conveyed out of band, even if that convention is not currently implemented durante WSDL 2.0 toolkits.

This practice will help prevent interoperability problems that could arise if one toolkit requires per particular convention that is not indicated per the WSDL 2.0 document, while another toolkit does not realize that that convention is required. 0 toolkits.

On the other hand, per client MAY engage an extension that is declared as optional in the WSDL 2.0 document. Therefore, the Web service MUST support every extension that is declared as optional sopra the WSDL 2.0 document, sopra addition esatto supporting every extension that is declared as mandatory. †

If finer-grain, direction-fine control of extensions is desired, then iraniansinglesconnection iscriversi such extensions may be designed per per direction-fin manner (from the client or from the Web service) so that either direction ple, instead of defining a celibe extension that governs both directions, two extensions could be defined -one for each direction.

Validity of a WSDL 2.0 document can only be assessed within the context of per attrezzi of supported extensions. Verso WSDL 2.0 document that contains verso required but unsupported extension is invalid with respect puro that batteria of supported extensions.

6.1.2 required attribute information item

The type of the required attribute information item is xs:boolean. Its default value is «false» (hence extensions are NOT required by default).

6.2 Attribute-based Extensibility

WSDL 2.0 allows qualified attribute information items whose [namespace name] is NOT «» to appear on any element information item whose namespace name IS «». Such attribute information items can be used onesto annotate WSDL 2.0 constructs such as interfaces, bindings, etc.

6.3 Extensibility Semantics

As indicated above, it is expected that the presence of extension elements and attributes will result sopra additional properties appearing per the component model.

The presence of an optional extension element or attribute MAY therefore augment the semantics of verso WSDL 2.0 document per ways that do not invalidate the existing semantics. However, the presence of a mandatory extension element MAY alter the semantics of verso WSDL 2.0 document in ways that invalidate the existing semantics.

Note that, however, once the client and service both know that an optional extension has been engaged (because the service has received verso message explicitly engaging that extension, for example), then the semantics of that extension supersede what the WSDL 2.0 document indicated. For example, the WSDL 2.0 document may have specified an XML message precisazione to be used, but also indicated an optional security extension that encrypts the messages. If the security extension is engaged, then the encrypted messages will niente affatto longer conform esatto the specified message specifica (until they are decrypted).

Authors of extension elements should make sure to include mediante the specification of these elements verso clear statement of the requirements for document conformance (see 1.3 Document Conformance).

Authors of extension elements that may manifest as properties of the Description component should be aware of the impact of imports on their extensions, or of their extensions on imports. It is not possible, within the component model, puro define extensions that have an effective scope equal preciso the scope of a containing file. Extensions that modify the behavior of the components contained mediante a description may therefore unexpectedly modify the behavior of components sopra imported descriptions as well, unless proper care is taken.

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