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11<meta name="DC.Title" content="Adding redefine elements" />
12<meta name="abstract" content="You can use the redefine mechanism to redefine simple and complex types, groups, and attribute groups obtained from external schema files. When you redefine a component, you are modifying its contents." />
13<meta name="description" content="You can use the redefine mechanism to redefine simple and complex types, groups, and attribute groups obtained from external schema files. When you redefine a component, you are modifying its contents." />
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syeshind0bdb8e2005-10-27 17:44:14 +000023<title>Adding redefine elements</title>
syeshin8f077832005-09-06 04:22:45 +000024</head>
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26
27
28<h1 class="topictitle1">Adding redefine elements</h1>
29
30
31
32
33<div><p>You can use the <samp class="codeph">redefine</samp> mechanism to redefine
34simple and complex types, groups, and attribute groups obtained from external
35schema files. When you redefine a component, you are modifying its contents.</p>
36
37<div class="section"><p>Like the <samp class="codeph">include</samp> mechanism, <samp class="codeph">redefine</samp> requires
38the external components to be in the same target namespace as the redefining
39schema, although external components from schemas that have no namespace can
40also be redefined.</p>
41<p>The following instructions were written for the Resource
42perspective, but they will also work in many other perspectives.</p>
43<p>To
kpricede20a692008-04-24 00:27:47 +000044add a redefine element, complete the following steps:</p>
kprice159fa582006-05-08 21:30:45 +000045</div>
46
47<ol>
kpricede20a692008-04-24 00:27:47 +000048<li class="stepexpand"><span>Open your XML schema in the XML schema editor. In the Outline view,
49select your schema.</span> The entire schema and its contents are displayed
50in the Design view.</li>
kprice159fa582006-05-08 21:30:45 +000051
kprice43d0c0f2006-05-18 15:56:09 +000052<li class="stepexpand"><span>In the Design view, right-click in the <strong>Directives</strong> section
syeshinf3d0d4b2005-07-27 18:33:03 +000053and click <span class="uicontrol">Add Redefine</span>.</span></li>
kprice159fa582006-05-08 21:30:45 +000054
kpricede20a692008-04-24 00:27:47 +000055<li class="stepexpand"><span>In the Properties view, click the <strong>General</strong> tab and click
56the <span class="uicontrol">Browse</span> <img src="../images/Browse.gif" alt="This&#10;graphic is the Browse button" /> button to the right of the <span class="uicontrol">Schema
57location</span> field.</span> The XML schema file you select must
58have the same namespace as the current schema.</li>
kprice159fa582006-05-08 21:30:45 +000059
kpricede20a692008-04-24 00:27:47 +000060<li class="stepexpand"><span>If you want to import an XML schema located in the workbench:</span>
61<ol type="a">
62<li><span>Select <span class="uicontrol">Workbench projects</span> and click <span class="uicontrol">Next</span>. </span>
kprice159fa582006-05-08 21:30:45 +000063</li>
64
kpricede20a692008-04-24 00:27:47 +000065<li><span>Select the schema you want to import and click <span class="uicontrol">Finish</span>.</span>
66</li>
kprice159fa582006-05-08 21:30:45 +000067
kpricede20a692008-04-24 00:27:47 +000068</ol>
69
70</li>
71
72<li class="stepexpand"><span>If you want to import an XML schema located on the Web:</span>
73<ol type="a">
74<li class="substepexpand"><span>Select <span class="uicontrol">HTTP</span> and click <span class="uicontrol">Next</span>.</span>
75</li>
76
77<li class="substepexpand"><span>Type the URL of the XML schema and click <span class="uicontrol">Finish</span>.</span>
78 <div class="note"><span class="notetitle">Note:</span> A local copy of the schema will not be stored in the workbench.
kprice159fa582006-05-08 21:30:45 +000079Every time you validate your schema, the schema's contents will be checked
80from the URL you specify.</div>
81</li>
82
kpricede20a692008-04-24 00:27:47 +000083</ol>
84
85</li>
86
kprice159fa582006-05-08 21:30:45 +000087<li class="stepexpand"><span>The XML schema editor will retrieve the location of the included
88XML schema file, and display it in the <span class="uicontrol">Schema location</span> field.
89This field can be edited at any time to reflect the location of the XML schema
90file.</span></li>
91
92<li class="stepexpand"><span>Click the <span class="uicontrol">Documentation</span> tab if you want
93to provide any information about this redefine element.</span> The <span class="uicontrol">Documentation</span> page
kprice43d0c0f2006-05-18 15:56:09 +000094is used for human readable material, such as a description.</li>
95
96<li class="stepexpand"><span>Click the <span class="uicontrol">Extensions</span> tab if you want to
97add application information elements to your annotations of schema components.</span>
98 The <span class="uicontrol">Extensions</span> page allows you to specify the
99schema and add XML content to your annotations.</li>
kprice159fa582006-05-08 21:30:45 +0000100
101</ol>
102
103<div class="section"><p>Once you have added the redefine element to your XML schema, you
104can redefine any of the simple and complex types, groups, and attribute groups
105in the XML schema you selected in the redefine element. </p>
106</div>
107
108</div>
109
kprice43d0c0f2006-05-18 15:56:09 +0000110<div><div class="reltasks"><strong>Related tasks</strong><br />
111<div><a href="../topics/taddimpt.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. You can use an import element to bring in definitions and declarations from an imported schema into the current schema.">Adding import elements</a></div>
112<div><a href="../topics/taddincl.html" title="As schemas become larger, it is often desirable to divide their content among several schema documents for purposes such as ease of maintenance, reuse, and readability. You can use the include element to bring in definitions and declarations from the included schema into the current schema. The included schema must be in the same target namespace as the including schema.">Adding include elements</a></div>
113</div>
114<div class="relref"><strong>Related reference</strong><br />
115<div><a href="../topics/rnmspc.html" title="An XML namespace is a collection of names, identified by a URI reference, which are used in XML documents as element types and attribute names.">XML namespaces</a></div>
116</div>
117</div>
kprice159fa582006-05-08 21:30:45 +0000118
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