web.xml web-resource-name不是可选的

Question

最近我添加了对JEE应用程序的授权，为实现这一目标，我在web.xml添加了以下几行：

的web.xml

<security-constraint>
    <web-resource-collection>
        <url-pattern>/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
        <role-name>USER_LOGIN</role-name>
    </auth-constraint>
</security-constraint>

但是在验证文件时，我的IDE会在指定要保护的URL之前响应它需要web-resource-name：

的web.xml

<security-constraint>
    <web-resource-collection>
        <web-resource-name></web-resource-name>
        <url-pattern>/*</url-pattern>
    </web-resource-collection>
    <auth-constraint>
        <role-name>USER_LOGIN</role-name>
    </auth-constraint>
</security-constraint>

对相应XML模式的交叉引用强调了这一假设：

网络common_3_1.xsd

<xsd:complexType name="web-resource-collectionType">
    <xsd:annotation>
        <xsd:documentation>

            The web-resource-collectionType is used to identify the
            resources and HTTP methods on those resources to which a
            security constraint applies. If no HTTP methods are specified,
            then the security constraint applies to all HTTP methods.
            If HTTP methods are specified by http-method-omission
            elements, the security constraint applies to all methods
            except those identified in the collection.
            http-method-omission and http-method elements are never
            mixed in the same collection. 

            Used in: security-constraint

        </xsd:documentation>
    </xsd:annotation>
    <xsd:sequence>
        <xsd:element name="web-resource-name" type="javaee:string">
            <xsd:annotation>
                <xsd:documentation>

                    The web-resource-name contains the name of this web
                    resource collection.

                </xsd:documentation>
            </xsd:annotation>
        </xsd:element>

因此，除了将其设置为不在场的名称之外，还有什么用途以及为什么Oracle将其描述为

  

web-resource-name是您用于此资源的名称。它的使用是可选的。

当XML架构明确指出它是强制性的吗？