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Re: What are web services ?

• To: <xml-dev@l...>
• Subject: Re: What are web services ?
• From: "Ken North" <kennorth@s...>
• Date: Mon, 30 May 2005 01:05:21 -0700
• References: <42992745.40804@m...>

Razvan MIHAIU wrote:
>> find a good definition of this ?

Web services are a vehicle for collaborative Internet computing. They expose
methods that can be invoked remotely.

>> A web service must be based on SOAP in order to belong in this category? A
web service must use XML for transferring data (like SOAP) ?

SOAP, XML-RPC and REST are three types of web services, with SOAP providing
RPC-style or document-style messaging.

>> Can we have web services without WSDL and UDDI ?

WSDL and UDDI are first-generation web services technology. They provide a
solution for describing a service, discovering a service and specifying the
contract between the provider and consumer.

There's been work on more sophisticated solutions -- for example, semantic web
services based on an ontology language (OWL-S or WSMO). There's more information
in "Developing Semantic Web Services" by Peter Alesso. Here's an excerpt:

http://www.webservicessummit.com/Excerpts/BuildingSemanticWS.htm


======== Ken North ===========
www.WebServicesSummit.com
www.SQLSummit.com
www.GridSummit.com

• References:
  • What are web services ?
    • From: Razvan MIHAIU <mihaiu@m...>

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