Definition

SOAP (Simple Object Access Protocol)

SOAP (Simple Object Access Protocol) is a way for a program running in one kind of operating system (such as Windows 2000) to communicate with a progam in the same or another kind of an operating system (such as Linux) by using the World Wide Web's Hypertext Transfer Protocol (HTTP)and its Extensible Markup Language (XML) as the mechanisms for information exchange. Since Web protocols are installed and available for use by all major operating system platforms, HTTP and XML provide an already at-hand solution to the problem of how programs running under different operating systems in a network can communicate with each other. SOAP specifies exactly how to encode an HTTP header and an XML file so that a program in one computer can call a program in another computer and pass it information. It also specifies how the called program can return a response.

SOAP was developed by Microsoft, DevelopMentor, and Userland Software and has been proposed as a standard interface to the Internet Engineering Task Force (IETF). It is somewhat similar to the Internet Inter-ORB Protocol (IIOP), a protocol that is part of the Common Object Request Broker Architecture (CORBA). Sun Microsystems' Remote Method Invocation (RMI) is a similar client/server interprogram protocol between programs written in Java.

An advantage of SOAP is that program calls are much more likely to get through firewall servers that screen out requests other than those for known applications (through the designated port mechanism). Since HTTP requests are usually allowed through firewalls, programs using SOAP to communicate can be sure that they can communicate with programs anywhere.

 

Getting started with SOAP
To explore how SOAP is used in the enterprise, here are some additional resources:
SOAP Tutorial: SOAP has gained status as a common messaging protocol in Web services and SOA projects. This SOAP tutorial provides insight as to what SOAP standard is and when to use it. SOAP basics, how it compares to REST, SOAP attachments and how SOAP functions with WSDL will be covered.

Contributor(s): Duraisamy Sivaram
This was last updated in September 2005
Posted by: Margaret Rouse

Email Alerts

Register now to receive SearchSOA.com-related news, tips and more, delivered to your inbox.
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy

More News and Tutorials

  • SOA, semantics and services combine in DoD intelligence sharing effort

    Using textual analytics and natural language processing, Modus Operandi developed a service that analyzes and parses unstructured data and pulls out events or information. Article includes tips on SOA and semantics, SOA and data models, and an SOA recipe for stone soup.Among highlights: Recognize that not everything can be or should be shared.

  • Q&A: Messaging middleware with Apache projects

    In this Q&A, Rob Davies discusses messaging middleware and the hurdles that many developers face as they first approach the subject. Davis is CTO of FuseSource and coauthor of the book "ActiveMQ in Action."

  • An SOA practices checklist for implementation roadmaps

    This article provides a master list of common practices, field proven by a number of SOA projects. Also supplied is a template that can be used as a checklist for developing SOA implementation roadmaps specific to an organization's transition project requirements.

Do you have something to add to this definition? Let us know.

Send your comments to techterms@whatis.com

There are Comments. Add yours.

 
TIP: Want to include a code block in your comment? Use <pre> or <code> tags around the desired text. Ex: <code>insert code</code>

REGISTER or login:

Forgot Password?
By submitting you agree to receive email from TechTarget and its partners. If you reside outside of the United States, you consent to having your personal data transferred to and processed in the United States. Privacy
Sort by: OldestNewest

Forgot Password?

No problem! Submit your e-mail address below. We'll send you an email containing your password.

Your password has been sent to: