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<meta name="abstract" content="An attribute group definition is an association between a name and a set of attribute declarations. Named groups of attribute declarations can greatly facilitate the maintenance and reuse of common attribute declarations in an XML schema." />
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<h1 class="topictitle1">Adding attribute groups</h1>
<div><p>An attribute group definition is an association between a name
and a set of attribute declarations. Named groups of attribute declarations
can greatly facilitate the maintenance and reuse of common attribute declarations
in an XML schema.</p>
<div class="section"><p>The following instructions were written for the Resource perspective,
but they will also work in many other perspectives.</p>
<p>To add an attribute
group to an XML schema, complete the following steps:</p>
</div>
<ol>
<li class="stepexpand"><span>Open your XML schema in the XML schema editor.</span></li>
<li class="stepexpand"><span>In the Outline view, right-click the <span class="uicontrol">Attributes</span> folder
and click <span class="uicontrol">Add Attribute Group</span>.</span> It appears
in the <span class="uicontrol">Attributes</span> folder.</li>
<li class="stepexpand"><span>Select your new group, and in the Design view, right-click the
attribute group and select <span class="menucascade"><span class="uicontrol">Refactor</span> &gt; <span class="uicontrol">Rename</span>
</span>. In the <span class="uicontrol">New Name</span> field, type a name
for the attribute group and click <span class="uicontrol">OK</span>.</span></li>
<li class="stepexpand"><span>To add an attribute, right-click your attribute group in the Outline
view, click <span class="uicontrol">Add Attribute</span>.</span> The attribute
appears below the attribute group in the Outline view.
<ol type="a">
<li class="substepexpand"><span>Select the attribute, and in the Design view, click the current
(default) name of the attribute, then type the new <span class="uicontrol">Name</span>.</span>
</li>
<li class="substepexpand"><span>In the Design view, click the current (default) attribute type
and select a type from the menu. Alternately, you can select browse to invoke
the Set Type menu for more options.</span> The Set Type dialog lists all
built-in and user-defined types currently available. You can change the <span class="uicontrol">Scope</span> of
the list by selecting one of the following options:<ul>
<li><span class="uicontrol">Workspace</span>. Lists all of the types available in
your workspace. </li>
<li><span class="uicontrol">Enclosing Project</span>. Lists all of the types available
in the project that contains your file. </li>
<li><span class="uicontrol">Current Resource</span> (default). List all of the types
available in your current file.</li>
<li><span class="uicontrol">Working Sets</span>. List all the types available within
the selected working set.</li>
</ul>
</li>
</ol>
</li>
<li class="stepexpand"><span>An attribute reference provides a reference to a global attribute.
To add an attribute reference, in the Design view, right-click the complex
type containing the element, and click <span class="uicontrol">Add Attribute Ref</span>.</span>
A declaration that references a global attribute enables the referenced
attribute to appear in the instance document in the context of the referencing
declaration. Select the reference, then in the Properties view, select the
attribute you want it to reference from the<span class="uicontrol">Reference</span> drop-down
</li>
<li class="stepexpand"><span>An attribute group reference provides a reference to an attribute
group. To add an attribute group reference, in the Design view, right-click
the complex type containing the element, and click <span class="uicontrol">Add Attribute
Group Ref</span>.</span> A declaration that references a global attribute
enables the referenced attribute to appear in the instance document in the
context of the referencing declaration. Select the reference, then in the
Properties view, select the attribute group you want it to reference from
the<span class="uicontrol">Reference</span> drop-down.</li>
<li class="stepexpand"><span>An <samp class="codeph">any</samp> element enables element content according
to namespaces, and the corresponding <samp class="codeph">any</samp> attribute element
enables attributes to appear in elements. To add an <samp class="codeph">any</samp> attribute,
right-click your attribute group and click <span class="uicontrol">Add Any Attribute</span>.</span>
The <samp class="codeph">any</samp> appears below the attribute group in the Outline
view. You can specify the following values for an <samp class="codeph">any</samp> attribute:
<ul>
<li>For a <span class="uicontrol">namespace</span> value, you can select:<ul>
<li><strong>##any</strong>: this allows any well-formed XML from any namespace.</li>
<li><strong>##local </strong>: this allows any well-formed XML that is not declared
to be in a namespace.</li>
<li><strong>##other</strong>: this allows any well-formed XML that is not from the target
namespace of the type being defined.</li>
<li><strong>##targetNamespace </strong>: this is shorthand for the target namespace
of the type being defined.</li>
</ul>
</li>
<li>For a <span class="uicontrol">processContents</span> value, you can select:<ul>
<li><strong>skip</strong>: the XML processor will not validate the attribute
content at all.</li>
<li><strong>lax</strong>: the XML processor will validate the attribute content as much
as it can.</li>
<li><strong>strict</strong>: the XML processor will validate all the attribute content.</li>
</ul>
</li>
</ul>
</li>
</ol>
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