SOAP
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Latest revision as of 01:26, 24 May 2010
Contents |
[edit] Background
From the draft W3C specification: SOAP is a lightweight protocol for exchange of information in a decentralized, distributed environment. It is an XML based communication protocol that consists of three parts:
- An envelope that defines a framework for describing what is in a message and how to process it;
- A set of encoding rules for expressing instances of application-defined data types; and
- A convention for representing remote procedure calls and responses.
Web Services Description Language (WSDL) is a specification defining how to describe Web Services in a common XML grammar. It describes four critical pieces of data:
- Interface information describing all publicly available functions
- Data type information for all message requests and message responses
- Binding information about the transport protocol to be used
- Address information for locating the specified service
WSDL is platform and language-independent and is used primarily (although not exclusively) to describe SOAP services. Using WSDL, a client can locate a web service and invoke any of its publicly available functions. With WSDL-aware tools (such as .NET), you can automate this process, enabling applications to easily integrate new services with little or no manual code.
[edit] Definitions, Acronyms and Abbreviations
This document uses the following definitions, acronyms and abbreviations.
| Acronym | Definition |
| SOAP | Simple Object Access Protocol |
| XML | Extended Mark-up Language |
| WSDL | Web Services Description Language |
[edit] Soap Interface Purpose
The SOAP interface to NADS is intended for communicating and responding to requests from a client application. As such the format is designed with machine readability rather than human readability in mind.
The SOAP interface has two major roles:
- Receipt and processing of incoming SOAP requests that describe new jobs to be created and dispatched.
- Generation and sending of responses to requests detailing job progress/status information to the originator of the job.
[edit] Encoding
Messages in this document are written to conform to the SOAP specification as registered at [1]. More specifically, the internal structure of the messages match the WSDL describing the exact message structure used in relation to the NADS SOAP interface.
