将属性添加到架构XML中的根元素

Question

I have a root element named "Project". This root contains type named "Layer", but I don't know how to define attributes to the root (Project) element.

This attribute which want add to root:

 <attribute name="name" type="string" />
 <attribute name="location" type="string" />
 <attribute name="Description" type="string" />
 <attribute name="CreationDate" type="string" />

This my schema:

 <element name="Project" type="tns:Layer"></element>

 <complexType name="Layer">
        <sequence>
            <element name="LayerName" type="string" maxOccurs="1"
                minOccurs="0">
            </element>
            <element name="Order" type="integer"></element>
            <element name="Visible" type="boolean"></element>
        </sequence>
        <attribute name="id" type="integer"></attribute>
    </complexType>

Answer 1

Your schema has just one element. It's type is called Layer . That means that <Project> can contain the elements <LayerName> , <Order> and <Visible> as well as an attribute named id .

If you want to add attributes to the Project element, you just have to place the attribute declarations after the one that already exists for ID:

<complexType name="Layer">
    <sequence>
        <element name="LayerName" type="string" maxOccurs="1"
            minOccurs="0">
        </element>
        <element name="Order" type="integer"></element>
        <element name="Visible" type="boolean"></element>
    </sequence>
    <attribute name="id" type="integer"></attribute>
    <attribute name="name" type="string"/>
    <attribute name="location" type="string" />
    <attribute name="Description" type="string" />
    <attribute name="CreationDate" type="string" />
</complexType>

Now you can use:

<Project name="..." location="..." ... > ... </Project>