Answer Posted / ankur pandit
WSDL-Web Service Description Language-
- WSDL is an XML format for describing network services as
a set of endpoints operating on
messages containing either document-oriented or procedure-
oriented information.
-The operations and messages are described abstractly, and
then bound to a concrete network
protocol and message format to define an endpoint.
- Related concrete endpoints are combined into abstract
endpoints (services).
- WSDL is extensible to allow description of endpoints and
their messages regardless of what
message formats or network protocols are used to
communicate, however, the only bindings
described in this document describe how to use WSDL in
conjunction with SOAP 1.1, HTTP
GET/POST, and MIME.
-The WSDL defines services as collections of network
endpoints, or ports. WSDL specification
provides an XML format for documents for this purpose.
-The abstract definition of ports and messages is separated
from their concrete use or
instance, allowing the reuse of these definitions.
- A port is defined by associating a network address with a
reusable binding, and a
collection of ports define a service.
-Messages are abstract descriptions of the data being
exchanged, and port types are abstract
collections of supported operations.
-The concrete protocol and data format specifications for a
particular port type constitutes
a reusable binding, where the messages and operations are
then bound to a concrete network
protocol and message format. In this way, WSDL describes
the public interface to the web
service.
-Web Services Description Language Version 2.0 (WSDL 2.0)
provides a model and an XML format
for describing Web services.
-WSDL 2.0 enables one to separate the description of the
abstract functionality offered by a
service from concrete details of a service description such
as “how” and “where” that
functionality is offered.
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