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那么接下来呢
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就轮到16.4.3
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这个需求图
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这是一个
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在
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蒸馏器规约
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这个包里面的，有一个需求图
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是什么
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为蒸馏器规约而派生的需求
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这是图的名字
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那图上你看，这些
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MR
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M就是之前那个使命嘛
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对不对
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mission那个
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R就是需求
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使命需求，这些是
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新添加进去的
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然后下面呢
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有个DS，就是蒸馏器规约的意思
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这个DS就指的这个DS
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然后这些是从这里派生的
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要表达这样的一个
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关系
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然后，你看下面有DS 12345
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一大堆，是吧
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然后这里有一个
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使命声明
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5.1
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这是之前有的
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那这些内容我都把它翻译成中文放这里了
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我们一会儿就不打字
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我们直接拷就行了
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那下面我们来画一下
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在这个包下面
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画一张这个图，对吧
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需求图，名字是这个
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那我们来画一下
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在哪个包
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蒸馏器规约
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这个图
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这个下面
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添加一张
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需求图，名字是什么
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为蒸馏器规约
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而派生的需求
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好
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就在这里了
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那我们一个一个加嘛
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都是需求
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对不对
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我们一个一个加
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第一个
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那我们直接
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名字叫电力
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MR.1是id，对吧
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MR.1是id
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然后，名字叫电力
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点错
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文本，名字在这里
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下一个是
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电力一般没有
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这是一个
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约束条件了
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好
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同样的，要把那个
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内容露出来，也同样点空白处
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然后把这个选上
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那么其它的操作
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跟我们前面画的这个图
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是一样的
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跟那个需求图是一样的
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包括
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后面这些派生关系，这个我就
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你看它也没有什么新的内容
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对不对
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没有什么新的知识点
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就是一个派生派生派生这样
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所以呢，我们这个画的过程呢
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我们就不放在这个视频里面了
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这样直接跳过去
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那么在画的过程中
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有一点要说的，就是画到这个
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简单蒸馏器就是MS.5.1
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这个的时候
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它从这个使命声明这里拖上来的
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对不对
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所以你看这里有一个from什么什么
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这是那个包的名字
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如果说，想把这个隐掉，变成这样
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看不到那个包
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那怎么办呢
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比如说，这里没有包的名字
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对吧
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没有这个from
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那怎么办
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右键点这个
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右键点空白处，properties
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然后呢
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在diagram里把这个勾掉
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展示命名空间，就是包的名字
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确定
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这样就没有了
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好
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我们现在画完了
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得到了这样一个需求图
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各种派生关系已经加上去了
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那我们看，还有什么不同的地方
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都有的
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但是呢，有一个小小的地方
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你看，这个
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比如说，假设我们要把这个
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线条画成这个样子
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你看，曲里拐弯这样子
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当然这个曲里拐弯也不是很好
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应该是横竖横竖，这样上来
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这样上来，更好
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横竖横竖这样更好
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那如果要这个怎么画
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那就改变这个线的风格
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一个是按住Ctrl
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按住Ctrl，这个线
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这有一个拐弯点过来
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对吧
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然后，你再按住Ctrl
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按住Ctrl
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拖动鼠标
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把它掰下来
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这样
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这样
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如果你想要更好看一点的话
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就把它搞成横竖横竖这种
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就好看一点
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