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Argdown is a text markup language created in 2014.

#603on PLDB 10Years Old
Download source code:
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a simple syntax for complex argumentation

Example from the web:
# Welcome to Argdown! [Intro]: Argdown is a simple syntax for defining argumentative structures, inspired by Markdown. + Writing a *pro & contra list* in Argdown is as simple as writing a twitter message (actually we are right in the middle of one). + But you can also **logically reconstruct** more complex dialectical relations between arguments or dive into the details of their premise-conclusion structures. + Finally, you can export Argdown as a graph and create **argument maps** of whole debates. This Argdown document only demonstrates the basic syntax elements. The argument map produced is a "bogus debate". To read a reconstruction of a *real* debate, select one of the **example debates** by moving your mouse to the *"Examples"* button on the upper left, above the text editor. ## Argdown Basics This is a normal statement with __bold__ and _italic_ text, a #tag and a [link]( [Statement 1]: Another statement (after a blank line), this time with a title defined in square brackets. We can use the title to refer to this statement later or mention it in other statements. #(Another tag) [Statement 2]: Let's do that now: The previous statement was @[Statement 1]. + <Argument title>: Statements can be supported by __arguments__. Arguments are defined by using angle brackets. #tag - <Another argument>: This arguments attacks @[Statement 2]. #tag - <Yet another argument>: Arguments can also be supported or attacked. #yet-another-tag <!-- By the way, this is a multiline comment. --> We can also do that the other way around: [Intro] -> <Argument 1> Headings can be used to group arguments and statements together. In the map these groups are visualized as grey boxes. Tags are visualized by the colors of the arguments and statements in the map. ### Argument reconstructions So far, we have ignored the internal structure of arguments. Arguments consist of premises from which conclusions are inferred. We can precisely define this premise-conclusion structure with Argdown: <Argument 1> (1) First premise (this is is a normal statement and you can do everything with it, we have done with the statements above). (2) [Statement 2]: We have already defined a statement with this title. Argdown allows you to add multiple statements to the same "equivalence class" by giving them the same title. The statements will then be treated as logically equivalent. -- Some inference rule (Some additional info: 1,2) -- (3) And now the conclusion -> Outgoing relations of the conclusion, are also interpreted as outgoing relations of the whole argument. +> <Yet another argument> <!-- The second relation is only "sketched", because it does not declare which premise of @<Argument 2> is supported. (At this point this is not possible, as we have not yet reconstructed @<Argument 2>) --> -> [Statement 1] We can also link to headings: [Back to top](#heading-welcome-to-argdown)

Language features

Feature Supported Token Example
MultiLine Comments
// A comment
Line Comments //
// A comment
Semantic Indentation

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