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| <meta name="DC.Title" content="Adding global elements" /> |
| <meta name="abstract" content="A global element is an element with a global scope. It is one that has been declared as part of the main schema rather than as part of a content model." /> |
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| <title>Adding global elements</title> |
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| <h1 class="topictitle1">Adding global elements</h1> |
| |
| |
| |
| |
| <div><p>A global element is an element with a global scope. It is one that |
| has been declared as part of the main schema rather than as part of a content |
| model.</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 a global |
| element, follow these 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, select your schema.</span> The entire |
| schema and its contents should be displayed in the Graph view.</li> |
| |
| <li class="stepexpand"><span>In the Graph view, right click in the <strong>Elements</strong> section and |
| click <span class="uicontrol">Add Element</span>.</span></li> |
| |
| <li class="stepexpand"><span>In the Properties view, click the <span class="uicontrol">General</span> tab, |
| and type a new name for the global element in the <span class="uicontrol">Name</span> field.</span> |
| </li> |
| |
| <li class="stepexpand"><span>In the Properties view, you can select the attribute <span class="uicontrol">Type</span> from |
| the predefined list in the menu next to the <span class="uicontrol">Type</span> field.</span> |
| <p>Alternately, you can select <span class="uicontrol">Browse</span> from the |
| list for more options. </p> |
| <div class="p">The Set Type dialog will appear, and 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>(Default) <span class="uicontrol">Current Resource</span>. 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> |
| </div> |
| <p>Select the type you want in the type list, then click <span class="uicontrol">OK</span>. </p> |
| |
| </li> |
| |
| <li class="stepexpand"><span>(Optional) Click the <span class="uicontrol">Other</span> tab.</span> In |
| this page, you can specify the following various values for the global element: |
| <ul> |
| <li><span class="uicontrol">abstract</span>. Click <strong>true </strong>if you want the |
| global element to be abstract. When a global element is declared to be abstract, |
| it cannot be used in an instance document. Instead, a member of that global |
| element's substitution group must appear in the instance document.</li> |
| |
| <li><span class="uicontrol">block</span>. This field determines whether the global |
| element may be replaced by an element derived from it.</li> |
| |
| <li><span class="uicontrol">final</span>. This field determines whether this global |
| element may be derived from.</li> |
| |
| <li><span class="uicontrol">fixed/default</span>. Click the <span class="uicontrol">Browse</span> button |
| and select the <span class="uicontrol">Fixed</span> or <span class="uicontrol">Default</span> radio |
| button and specify an appropriate value. If you select <strong>Fixed</strong>, the global |
| element has a fixed value, which cannot be changed. If you select <strong>Default</strong>, |
| the element has a default value.</li> |
| |
| <li><span class="uicontrol">form</span>. Use this field to indicate if the appearance |
| of this global element in an instance of the XML schema (that is, an XML file |
| associated with the XML schema) must be qualified by a namespace.</li> |
| |
| <li><span class="uicontrol">nillable</span>. Select <strong>true</strong> if you do not |
| want the global element to be able to have any child elements, only attributes. </li> |
| |
| <li><span class="uicontrol">substitutionGroup</span>. A substitution group allows |
| elements to be substituted for other elements.</li> |
| |
| </ul> |
| |
| </li> |
| |
| <li class="stepexpand"><span>Click the <span class="uicontrol">Attributes</span> tab</span> You |
| can use this page to add attributes, attribute references, attributes group |
| references, and <samp class="codeph">any</samp> attributes to your global element. |
| </li> |
| |
| <li class="stepexpand"><span>An attribute associates an attribute name with a specific type |
| and value. To add an attribute, right-click in the Attributes page, and click <span class="uicontrol">Add |
| Attribute</span>.</span> You can specify the following values for |
| an attribute |
| <ul> |
| <li><span class="uicontrol">fixed/default</span>. Click the <span class="uicontrol">Browse</span> button |
| and select the <span class="uicontrol">Fixed</span> or <span class="uicontrol">Default</span> radio |
| button and specify an appropriate value. If you select <strong>Fixed</strong>, the attribute |
| has a fixed value, which cannot be changed. If you select <strong>Default</strong>, |
| the attribute has a default value.</li> |
| |
| <li><span class="uicontrol">form</span>. Use this field to indicate if the appearance |
| of this attribute in an instance of the XML schema must be qualified by a |
| namespace.</li> |
| |
| <li><span class="uicontrol">name</span>. Enter the name of the attribute.</li> |
| |
| <li><span class="uicontrol">type</span>. Click the <span class="uicontrol">Browse</span> button |
| and select the type of the attribute. </li> |
| |
| <li><span class="uicontrol">use</span>. This field indicates how an attribute |
| can be used in an instance document. If you select <strong>optional</strong>, the attribute |
| can appear once, but it does not have to. If you select <strong>required</strong>, the |
| attribute must appear once. If you select <strong>prohibited</strong>, the attribute |
| must not appear. <strong>Note</strong>: If you selected the <span class="uicontrol">Default</span> radio |
| button, you must select <strong>optional</strong> in this field, otherwise the default |
| value will not be valid.</li> |
| |
| </ul> |
| |
| </li> |
| |
| <li class="stepexpand"><span>An attribute reference provides a reference to a global attribute. |
| To add an attribute reference, right-click in the Attributes page, 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. The menu option to add an attribute |
| reference only appears if there are global attributes defined elsewhere in |
| the document. |
| <ol type="a"> |
| <li><span>Select the reference, then select the global attribute you want |
| it to reference from the <span class="uicontrol">ref</span> list.</span></li> |
| |
| </ol> |
| |
| </li> |
| |
| <li class="stepexpand"><span>An attribute group reference provides a reference to an attribute |
| group. To add an attribute group reference, right-click in the Attributes |
| page, and click <span class="uicontrol">Add Attribute Group Ref</span>.</span> A |
| declaration that references an attribute group enables the referenced attribute |
| group to appear in the instance document in the context of the referencing |
| declaration. The menu option to add an attribute group reference only appears |
| if there are attribute groups defined elsewhere in the document. |
| <ol type="a"> |
| <li><span>Select the reference, then select the attribute group you want |
| it to reference from the <span class="uicontrol">ref</span> list.</span></li> |
| |
| </ol> |
| |
| </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 in the Attributes page and click <span class="uicontrol">Add Any Attribute</span>.</span> |
| You can specify the following values for an <samp class="codeph">any</samp> attribute: |
| <ul> |
| <li>For a <strong>namespace</strong> value, you can select <strong>##any</strong> (this allows |
| any well-formed XML from any namespace), <strong>##local </strong> (this allows any |
| well-formed XML that is not declared to be in a namespace), <strong>##other </strong> (this |
| allows any well-formed XML that is not from the target namespace of the type |
| being defined) or <strong>##targetNamespace </strong> (which is shorthand for the target |
| namespace of the type being defined). </li> |
| |
| <li>For a <span class="uicontrol">processContents</span> value, you can select <strong>skip</strong> (the |
| XML processor will not validate the attribute content at all), <strong>lax</strong> (the |
| XML processor will validate the attribute content as much as it can), or <strong>strict</strong> (the |
| XML processor will validate all the attribute content).</li> |
| |
| </ul> |
| |
| </li> |
| |
| <li class="stepexpand"><span>Click the <span class="uicontrol">Documentation</span> tab if you want |
| to provide any information about this global element.</span> The <span class="uicontrol">Documentation</span> page |
| is used for human readable material, such as a description, and the <span class="uicontrol">App |
| Info</span> page can be used to provide information for applications. |
| </li> |
| |
| </ol> |
| |
| <div class="section">You can add a content model to a global element, which is the representation |
| of any data that can be contained inside the global element. For more information |
| about working with content models, refer to the related tasks.</div> |
| |
| </div> |
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