Dia 的灵感来自于广告 Windows 程序“Visio”，但更多 面向非正式图表 随意使用。 可以用来画画 许多不同类型的图表。 它 目前有特殊物品可以帮忙 绘制实体关系图、UML 图表、流程图、网络 图表和许多其他图表。 它 还可以添加对 通过编写简单的 XML 来创建新形状 文件，使用 SVG 的子集进行绘制 形状。
Since a few people mentioned Visio, Dia is a free alternative. It's not the greatest, but it gets the job done.
Dia is inspired by the commercial Windows program 'Visio', though more geared towards informal diagrams for casual use. It can be used to draw many different kinds of diagrams. It currently has special objects to help draw entity relationship diagrams, UML diagrams, flowcharts, network diagrams, and many other diagrams. It is also possible to add support for new shapes by writing simple XML files, using a subset of SVG to draw the shape.
This is called Use Case Diagrams in UML. There are so many tools to draw them ranging from commercial to free. You may try Violet. Download it from here. http://sourceforge.net/projects/violet/
这是一个导航模型（也称为超文本模型）。 这不是 UML 标准图之一，但所有 Web 应用程序的设计方法（例如 WebML）都支持该图（事实上，这对它们来说是最重要的）。
（这并不意味着它不能在 UML 中绘制，但我认为您会发现首先获取导航模型很有用）
This is a navigation model (also known as a hypertext model). This is not one of the UML standard diagrams but all design methods for web applications (e.g. WebML) support this diagram (and in fact, it is the most important for them).
(this does not mean that it cannot be draw in UML but I think you would find useful to take a loot at navigation models first)
It seems to be a diagram displaying the options to navigate a web page. If you want to do this in UML you can do it by using a state diagram. Pages are states with the links being transitions.
It would look very different, but it display the same information, and if you want with more detail.
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如果您想生成简单的站点地图，请尝试http://writemaps.com/。
否则，您将需要深入研究 visio 或 visio 同等产品。
Try http://writemaps.com/ if you want to generate a simple sitemap.
Otherwise you'll need to delve into visio or a visio equivalent.
由于一些人提到了 Visio，Dia 是一个免费的替代品。 它不是最伟大的，但它可以完成工作。
Since a few people mentioned Visio, Dia is a free alternative. It's not the greatest, but it gets the job done.
你可以使用思维导图程序来制作类似 htat
freemind 是一个相当不错的
you can use a mind-mapping program to make something like htat
freemind is a pretty good one
这在 UML 中称为用例图。 有很多工具可以绘制它们，从商业到免费。 你可以试试紫罗兰。 从这里下载。
http://sourceforge.net/projects/violet/
This is called Use Case Diagrams in UML. There are so many tools to draw them ranging from commercial to free. You may try Violet. Download it from here.
http://sourceforge.net/projects/violet/
看起来像一个详细的用例图，其中一些用例使用了更深层次的用例。 也可能是一个对象参与图。
Looks like an elaborated use-case diagram, in which some use cases are using deeper use cases. Might also be an object-participation diagram.
如果我要制作这种类型的图表，我可能会使用 MS Visio，它有许多用于创建此类图表（流程图等）的工具。
If I were making a diagram of that type, I'd probably use MS Visio, which has many tools for creating diagrams like that (flowcharts and the like).
这是一个导航模型（也称为超文本模型）。 这不是 UML 标准图之一，但所有 Web 应用程序的设计方法（例如 WebML）都支持该图（事实上，这对它们来说是最重要的）。
（这并不意味着它不能在 UML 中绘制，但我认为您会发现首先获取导航模型很有用）
This is a navigation model (also known as a hypertext model). This is not one of the UML standard diagrams but all design methods for web applications (e.g. WebML) support this diagram (and in fact, it is the most important for them).
(this does not mean that it cannot be draw in UML but I think you would find useful to take a loot at navigation models first)
它似乎是一个显示网页导航选项的图表。 如果您想在 UML 中执行此操作，可以使用状态图来完成。 页面是状态，链接是转换。
它看起来会非常不同，但它显示相同的信息，如果您想要更多详细信息。
It seems to be a diagram displaying the options to navigate a web page. If you want to do this in UML you can do it by using a state diagram. Pages are states with the links being transitions.
It would look very different, but it display the same information, and if you want with more detail.