blocks|key|1573034|text|几天前也有一个类似的问题：What+is+a+good+tool+for+creating+railroad+diagrams?|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1573035|这个问题是关于SQLite语法图中的铁路图是如何生成的。accepted+answer发现这些图表是使用用Tcl编写的领域特定语言生成的。|1573036|Another+answer建议使用基于EBNL语法的图表生成器。|1573037|entityMap|0|LINK|mutability|MUTABLE|url|https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams|1|https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams/773416#773416|2|https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams/773453#773453^0|D|1F|0|0|S|F|1|0|0|E|2|0^^$0|@$1|2|3|4|5|6|7|T|8|@]|9|@$A|U|B|V|1|W]]|C|$]]|$1|D|3|E|5|6|7|X|8|@]|9|@$A|Y|B|Z|1|10]]|C|$]]|$1|F|3|G|5|6|7|11|8|@]|9|@$A|12|B|13|1|14]]|C|$]]|$1|H|3|-4|5|6|7|15|8|@]|9|@]|C|$]]]|I|$J|$5|K|L|M|C|$N|O]]|P|$5|K|L|M|C|$N|Q]]|R|$5|K|L|M|C|$N|S]]]]

There was a similar question a few days ago:
<a href="https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams">What is a good tool for creating railroad diagrams?</a>

That question was about how railroad diagrams in the SQLite syntax diagrams were generated. The <a href="https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams/773416#773416">accepted answer</a> found that the diagrams were generated using a DSL written in Tcl.

<a href="https://stackoverflow.com/questions/773371/what-is-a-good-tool-for-creating-railroad-diagrams/773453#773453">Another answer</a> offered a suggestion to use a diagram generator which works off of EBNL grammar.

blocks|key|1573094|text|看看http://code.google.com/p/html-railroad-diagram/，它可以生成HTML铁路图。有一个example显示了JavaScript在HTML页面中生成的带有链接的JSON铁路。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|1573095|entityMap|0|LINK|mutability|MUTABLE|url|http://code.google.com/p/html-railroad-diagram/|1|http://html-railroad-diagram.googlecode.com/svn/trunk/examples/railroad.html^0|2|1B|0|1U|7|1|0^^$0|@$1|2|3|4|5|6|7|N|8|@]|9|@$A|O|B|P|1|Q]|$A|R|B|S|1|T]]|C|$]]|$1|D|3|-4|5|6|7|U|8|@]|9|@]|C|$]]]|E|$F|$5|G|H|I|C|$J|K]]|L|$5|G|H|I|C|$J|M]]]]

Take a look at <a href="http://code.google.com/p/html-railroad-diagram/" rel="nofollow">http://code.google.com/p/html-railroad-diagram/</a> which generates HTML railroad diagrams. There is an <a href="http://html-railroad-diagram.googlecode.com/svn/trunk/examples/railroad.html" rel="nofollow">example</a> that shows the JSON railroad generated in an HTML page by JavaScript with links.

blocks|key|1573128|text|我似乎记得IBM有一个工具可以构建这样的图表，作为他们的BookMaster+SGML套件的一部分。大型机文档中经常使用铁路示意图。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1573129|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

I seem to remember that IBM has a tool that builds such diagrams as part of their BookMaster SGML suite. Railroad diagrams are often used in mainframe documentation.

blocks|key|1573179|text|IBM的铁路轨道生成器能够很好地处理的一件事是默认值。我还没有看到另一个生成器可以做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1573180|一个例子是|1573181|++++++++++┌─────◀────┐┌(──«defaults»─)─┐++++++++++++++++++++++++
▶▶─COMMAND┴«argument»┴┼────────────────┼──────────────────────▶◀
++++++++++++++++++++++│+┌────◀─────┐+++│++++++++++++++++++++++++
++++++++++++++++++++++└(┴┬«option»┬┴┬─┬┘++++++++++++++++++++++++
+++++++++++++++++++++++++└Help────┘+└)┘+++++++++++++++++++++++++|code-block|syntax|javascript|1573182|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|L|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|M|8|@]|9|@]|A|$G|H]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

One of the things that IBM's railroad track generator handles well is default values. I have not seen another generator that does this.

An example is

<pre><code> ┌─────◀────┐┌(──«defaults»─)─┐ 
▶▶─COMMAND┴«argument»┴┼────────────────┼──────────────────────▶◀
 │ ┌────◀─────┐ │ 
 └(┴┬«option»┬┴┬─┬┘ 
 └Help────┘ └)┘ 
</code></pre>

blocks|key|1573274|text|我找到了J-algo工具。我认为这是非常容易绘制图表，但我不能导出为图像或其他类型。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1573275|​|1573276|📷|atomic|offset|length|1573277|1573278|http://j-algo.binaervarianz.de/index.php|1573279|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/26c38589c19e80420ec8e409dac83f8c.png|imageAlt|1|LINK|MUTABLE|url^0|0|0|0|1|0|0|0|0|14|1|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|10|8|@]|9|@$G|11|H|12|1|13]]|A|$]]|$1|I|3|C|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@$G|16|H|17|1|18]]|A|$]]|$1|L|3|-4|5|6|7|19|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]|U|$5|V|P|W|A|$X|K]]]]

I found J-algo tool. I think it is very easy to draw diagram but I can't export to image or another type.

<img src="https://i.stack.imgur.com/dpTG0.png" alt="enter image description here">

<a href="http://j-algo.binaervarianz.de/index.php" rel="nofollow noreferrer">http://j-algo.binaervarianz.de/index.php</a>

I love the syntax of <a href="https://en.wikipedia.org/wiki/Syntax_diagram" rel="nofollow noreferrer">railroad diagrams</a> on <a href="https://www.json.org/" rel="nofollow noreferrer">json.org</a> which are a graphical representation of the BNF language. I haven't found any tools that can produce results as eloquently.
<h2>Can anyone identify the tool used to generate these diagrams?</h2>
<img src="https://i.stack.imgur.com/e3RRI.png" alt="" />
<img src="https://i.stack.imgur.com/7Zcxu.png" alt="" />

Tool for generating railroad diagram used on json.org

SQLite

JSON

我喜欢上的语法，它是BNF语言的图形化表示。我还没有找到任何工具可以如此雄辩地产生结果。有人能识别出用来生成这些图表的工具吗？​​

问基于json.org的铁路运行图生成工具
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