Hi,
Basically used for exchanging information in a decentralized, distributed environment
A Web service is a software system designed to support interoperable machine-to-machine interaction over a network. It has an interface described in a machine-processable format (specifically WSDL). Other systems interact with the Web service in a manner prescribed by its description using SOAP messages, typically conveyed using HTTP with an XML serialization in conjunction with other Web-related standards.
One typical use of SOAP attachments is
*for transporting intact, binary data
such as image files.
*For another example, your system may need to transport
XML documents to other parts of the system without the overhead of
validating them. These XML documents that do not need to conform to your
particular schema or DTD can be passed as attachments.
*By using SOAP attachments, the SOAP message body is much smaller
because it contains only a reference to the data and not the data itself.
*Using attachments can be more efficient because smaller SOAP messages are
processed more quickly than very large messages, and the translation of the
data to Java objects is reduced for attachments.
*SOAP attachments are implemented by wrapping the SOAP message and one
or more attachments in an envelope of Multipurpose Internet Mail Extensions
(MIME).
Regards,
Nutan
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