Java Reference
In-Depth Information
Nestedwithin
definitions
are
types
,
message
,
portType
,
binding
,and
service
elements:
•
types
presentsuser-defineddatatypes(usedinthecontextof
message
ele-
ments)underadatatypesystem.Althoughanytypedefinitionlanguagecanbe
used,XMLSchemaismandatedbytheWS-IinBasicProfile1.0.
types
can
contain zero or more
schema
elements. This example has a single
schema
element,whichimportsanexternalschema.The
types
elementisoptional.It
is not present when the service uses only XML Schema builtin simple types,
such as strings and integers.
•
message
definesaone-wayrequestorresponsemessage(conceptuallyafunc-
tioninvocationoraninvocationresponse)thatmayconsistofoneormoreparts
(conceptually equivalent to function parameters or return values). Each part is
described by a
part
element whose
name
attribute identifies a parameter/re-
turnvalueelement.The
element
attributeidentifiesanotherelement(defined
elsewhere) whose value is passed to this parameter or which provides the re-
sponse value. Zero or more
part
elements, and zero or more
message
ele-
ments may be specified.
•
portType
describes a web service interface via its operations. Each
oper-
ation
elementcontains
input
and/or
output
elementsbasedontheMEP.
error information can be specified when there is an
output
element.) The
wsam:Action
attribute is used with message routing in the context of WS-
Addressing —see
http://en.wikipedia.org/wiki/WS-Address-
the message via its
name
attribute (and also provides the
part
elements de-
scribing parameters and return value).
operation
elements are optional; at
least one
portType
element must be specified.
•
binding
provides details on how a
portType
operation (such as
c2f
or
f2c
) is transmitted over the wire. This element's
type
attribute identifies
the
portType
element defined earlier in the document. The nested
soap:binding
elementindicatesthataSOAP1.1bindingisbeingused.Its
transport
attribute's URI value identifies HTTP as the transport protocol
(SOAP over HTTP), and its
style
attribute identifies
document
as the de-
faultservicestyle.Each
operation
elementconsistsof
soap:operation
,
input
, and
output
elements. The
soap:operation
element is a SOAP
extensionelementthatprovidesextrabindinginformationattheoperationlevel.
