帮我用xml代码通过xadl2.0来描述一个药品销售系统

好的，下面是一个药品销售系统的xADL2.0描述，使用XML格式：

<?xml version="1.0" encoding="UTF-8"?>
<xadl:xADL xmlns:xadl="http://www.archstudio.org/xadl3" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.archstudio.org/xadl3 http://www.archstudio.org/xadl3/xadl3.xsd">
    <xadl:topLevel>
        <xadl:archStructure>
            <!-- 前端界面组件 -->
            <xadl:component id="frontend" name="Frontend Interface">
                <xadl:description>
                    The frontend interface component is responsible for interacting with users, displaying drug information, placing orders, and processing payments.
                </xadl:description>
                <xadl:interface id="frontendInterface" name="Frontend Interface">
                    <xadl:directionality>inout</xadl:directionality>
                    <xadl:signature>
                        <xadl:parameter name="drugInfo" type="string" direction="in" description="Drug information"/>
                        <xadl:parameter name="orderInfo" type="string" direction="in" description="Order information"/>
                        <xadl:parameter name="response" type="string" direction="out" description="Backend service response"/>
                    </xadl:signature>
                </xadl:interface>
            </xadl:component>
            <!-- 后端服务组件 -->
            <xadl:component id="backend" name="Backend Service">
                <xadl:description>
                    The backend service component is responsible for processing orders, managing inventory, handling payments, and communicating with the database.
                </xadl:description>
                <xadl:interface id="backendInterface" name="Backend Interface">
                    <xadl:directionality>inout</xadl:directionality>
                    <xadl:signature>
                        <xadl:parameter name="orderInfo" type="string" direction="in" description="Order information"/>
                        <xadl:parameter name="drugInfo" type="string" direction="out" description="Drug information"/>
                        <xadl:parameter name="response" type="string" direction="out" description="Backend service response"/>
                    </xadl:signature>
                </xadl:interface>
            </xadl:component>
            <!-- 数据库组件 -->
            <xadl:component id="database" name="Database">
                <xadl:description>
                    The database component is responsible for storing drug information, order information, user information, and other data.
                </xadl:description>
                <xadl:interface id="databaseInterface" name="Database Interface">
                    <xadl:directionality>inout</xadl:directionality>
                    <xadl:signature>
                        <xadl:parameter name="tableName" type="string" direction="in" description="Table name"/>
                        <xadl:parameter name="condition" type="string" direction="in" description="Condition"/>
                        <xadl:parameter name="data" type="string" direction="in" description="Data to be saved"/>
                        <xadl:parameter name="result" type="string" direction="out" description="Query result"/>
                    </xadl:signature>
                </xadl:interface>
            </xadl:component>
            <!-- 前端界面连接器 -->
            <xadl:connector id="frontendConnector" name="Frontend Connector">
                <xadl:interface idRef="frontendInterface"/>
                <xadl:interface idRef="backendInterface"/>
            </xadl:connector>
            <!-- 后端服务连接器 -->
            <xadl:connector id="backendConnector" name="Backend Connector">
                <xadl:interface idRef="backendInterface"/>
                <xadl:interface idRef="databaseInterface"/>
            </xadl:connector>
        </xadl:archStructure>
    </xadl:topLevel>
</xadl:xADL>

上面的代码描述了一个药品销售系统，包括前端界面组件、后端服务组件、数据库组件和连接器。每个组件都有其描述和接口定义，连接器将组件连接起来，实现组件之间的交互和数据传输。