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<head><title>逻辑视图</title></head>
<center><h1>逻辑视图</h1></center>
<div><P align=right><FONT face=黑体 color=#ff0033><FONT face=Verdana><FONT color=#f70938><FONT face=黑体><a href="200604112229525.html" tppabs="http://www.itisedu.com/phrase/200604112229525.html" target="_new">中科永联</a>高级技术培训中心（</FONT><FONT face=黑体>www.itisedu.com</FONT><FONT face=黑体>）<IMG src="200641612353838.jpg" tppabs="http://www.itisedu.com/manage/Upload/image/200641612353838.jpg" border=0></FONT></FONT></FONT></FONT></P>
<P><FONT face=Verdana> <a href="200604161231275.html" tppabs="http://www.itisedu.com/phrase/200604161231275.html" target="_new">逻辑视图</a>（<a href="javascript:if(confirm('http://www.itisedu.com/phrase/200604241330455.html \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.itisedu.com/phrase/200604241330455.html'" tppabs="http://www.itisedu.com/phrase/200604241330455.html" target="_new">Logical View</a>，又叫<a href="javascript:if(confirm('http://www.itisedu.com/phrase/200604241330575.html \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.itisedu.com/phrase/200604241330575.html'" tppabs="http://www.itisedu.com/phrase/200604241330575.html" target="_new">设计视图</a>（<a href="javascript:if(confirm('http://www.itisedu.com/phrase/200604241331155.html \n\nThis file was not retrieved by Teleport Pro, because it was unavailable, or its retrieval was aborted, or the project was stopped too soon. \n\nDo you want to open it from the server?'))window.location='http://www.itisedu.com/phrase/200604241331155.html'" tppabs="http://www.itisedu.com/phrase/200604241331155.html" target="_new">Design View</a>））是为了便于理解系统设计的结构与组织，在“分析设计”<a href="200603110944215.html" tppabs="http://www.itisedu.com/phrase/200603110944215.html" target="_new">工作流</a>程中使用了名为逻辑<a href="200603141659315.html" tppabs="http://www.itisedu.com/phrase/200603141659315.html" target="_new">视图</a>的构架视图。系统只有一个逻辑视图，该视图以图形方式说明关键的<a href="200604240937105.html" tppabs="http://www.itisedu.com/phrase/200604240937105.html" target="_new">用例</a>实现、<a href="200604161433025.html" tppabs="http://www.itisedu.com/phrase/200604161433025.html" target="_new">子系统</a>、包和<a href="200603090857555.html" tppabs="http://www.itisedu.com/phrase/200603090857555.html" target="_new">类</a>，它们包含了在构架方面具有重要意义的行为。逻辑视图在每次迭代过程中都会加以改进。</FONT></P>
<P align=center><FONT face=Verdana><IMG src="2006416122959644.gif" tppabs="http://www.itisedu.com/manage/Upload/image/2006416122959644.gif" border=0></FONT></P>
<P><FONT face=Verdana> 逻辑视图表示了<a href="200604161258515.html" tppabs="http://www.itisedu.com/phrase/200604161258515.html" target="_new">设计模型</a>中在构架方面具有重要意义的部分，即类、子系统、包和用例实现的子集。</FONT></P>
<P><FONT face=Verdana> 另外还有四个视图，即<a href="200604161240175.html" tppabs="http://www.itisedu.com/phrase/200604161240175.html" target="_new">用例视图</a>(在“<a href="200603101518295.html" tppabs="http://www.itisedu.com/phrase/200603101518295.html" target="_new">需求</a>”工作流程中处理)、<a href="200604161234465.html" tppabs="http://www.itisedu.com/phrase/200604161234465.html" target="_new">进程视图</a>、<a href="200604161237325.html" tppabs="http://www.itisedu.com/phrase/200604161237325.html" target="_new">部署视图</a>和<a href="200604161156485.html" tppabs="http://www.itisedu.com/phrase/200604161156485.html" target="_new">实施视图</a>；后面三个视图在“分析设计”和“实施”工作流程中进行处理。</FONT></P>
<P><FONT face=Verdana> 构架视图记录在<a href="200604241327425.html" tppabs="http://www.itisedu.com/phrase/200604241327425.html" target="_new">软件构架</a>文档中。你可以添加其他视图，如安全视图，来表达<a href="200604232134205.html" tppabs="http://www.itisedu.com/phrase/200604232134205.html" target="_new">软件</a>构架的其他特定方面。</FONT></P>
<P><FONT face=Verdana> 所以，构架视图在本质上可以看成是所建模型的抽象或简化，它们通过舍弃具体细节来突出重要的特征。系统开发过程中，构架是提高所建模型质量的重要手段。<BR><FONT face=Verdana>© 1987 - 2001 <a href="200604032121225.html" tppabs="http://www.itisedu.com/phrase/200604032121225.html" target="_new">Rational</a> Software Corporation。版权所有。 </FONT></FONT></P></div>
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