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<h1 class="topictitle1">Creating top-down Web services</h1>
<div><p>Web services can be created using two methods: top-down development
and bottom-up development. Top-down Web services development involves creating
a Web service from a WSDL file.</p>
<p>When creating a Web service using a top-down approach, first you design
the implementation of the Web service by creating a WSDL file. You can do
this using the WSDL Editor. You can then use the Web services wizard to create
the Web service and skeleton Java™ classes to which you can add the required
code.</p>
<p>Although bottom-up Web service development may be faster and easier, especially
if you are new to Web services, the top-down approach is the recommended way
of creating a Web service. By creating the WSDL file first you will ultimately
have more control over the Web service, and can eliminate interoperability
issues that may arise when creating a Web service using the bottom-up method.</p>
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<div class="parentlink"><strong>Parent topic:</strong> <a href="../concepts/cws.html" title="A Web service is a set of related application functions that can be programmatically invoked over the Internet. Businesses can dynamically mix and match Web services to perform complex transactions with minimal programming. Web services allow buyers and sellers all over the world to discover each other, connect dynamically, and execute transactions in real time with minimal human interaction.">Web services overview</a></div>
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<div class="linklist"><strong>Related Concepts</strong><br />
<div><a href="cws.html" title="A Web service is a set of related application functions that can be programmatically invoked over the Internet. Businesses can dynamically mix and match Web services to perform complex transactions with minimal programming. Web services allow buyers and sellers all over the world to discover each other, connect dynamically, and execute transactions in real time with minimal human interaction.">Web services overview</a></div>
<div><a href="cwsinwsa.html" title="">Tools for Web services development</a></div>
<div><a href="cwsbtmup.html" title="Web services can be created using two methods: top-down development and bottom-up development. Bottom-up Web services development involves creating a Web service from a Java bean or enterprise bean.">Creating bottom-up Web services</a></div></div>
<div class="linklist"><strong>Related Tasks</strong><br />
<div><a href="../tasks/toverws.html" title="Use Web services tools to discover, create, and publish Web services that are created from Java beans, enterprise beans, and WSDL files. You can create of Web services using a top-down approach (which starts with a WSDL file) or a bottom-up approach (which starts with a Java bean or EJB)."> Developing Web
services</a></div></div>
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