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F E A T U R E

MMS: The Muscle Behind the Life Time Fitness Machine

July 8, 2002
By James Hutchinson

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Web Services Glossary

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	In this article
	Introduction
	The Building Blocks
	Onward and Upward
	Environmental Concerns
	Web Services Glossary
	From the Ground Up
	Related Sites
	Best Practices

• Extensible Markup Language (XML): Similar to HTML, XML is a text-format language that is the basis for structured documents on the Web. See www.w3.org/XML/1999/XML-in-10-points.

• Simple Object Access Protocol (SOAP): Developed by Microsoft, SOAP uses XML and HTTP to let apps running on different OSs communicate. SOAP has been presented to the IETF. A somewhat dubious distinction is that SOAP calls can easily pass through firewalls, which normally accept HTTP traffic over Port 80. See the spec at www.w3.org/TR/SOAP/.

• Universal Description, Discovery and Integration (UDDI):Envisioned as the mother of all yellow pages, UDDI is an XML-based registry where businesses can list themselves on the Internet by name, location and product or service offered. The UDDI specification incorporates W3C and IETF standards, such as XML, HTTP, SOAP and DNS. See www.uddi.org/specification.html.

• Web Services Description Language (WSDL):WSDL is an XML-based language that describes the services an enterprise offers. Works in tandem with UDDI to help businesses reach customers. See the spec at www.w3.org/TR/wsdl.