Syntax diagrams (or railroad diagrams) are a way to represent a context-free grammar. They represent a graphical alternative to Backus–Naur form, EBNF, Augmented Backus–Naur form, and other text-based grammars as metalanguages. Early books using syntax diagrams include the "Pascal User Manual" written by Niklaus Wirth[1] (diagrams start at page 47) and the Burroughs CANDE Manual.[2] In the compilation field, textual representations like BNF or its variants are usually preferred. BNF is text-based, and used by compiler writers and parser generators. Railroad diagrams are visual, and may be more readily understood by laypeople, sometimes incorporated into graphic design. The canonical source defining the JSON data interchange format provides yet another example of a popular modern usage of these diagrams.
^Niklaus Wirth: The Programming Language Pascal. (July 1973)
^Burroughs B6700/B7700 Command AND Edit (CANDE) Language: Information Manual
Syntaxdiagrams (or railroad diagrams) are a way to represent a context-free grammar. They represent a graphical alternative to Backus–Naur form, EBNF...
A diagram is a symbolic representation of information using visualization techniques. Diagrams have been used since prehistoric times on walls of caves...
defined by the syntax, so computer languages in general have become more restrictive in how a quoted-literal is defined. Syntaxdiagram: Wirth, Niklaus...
authority = [userinfo "@"] host [":" port] This is represented in a syntaxdiagram as: The URI comprises: A non-empty scheme component followed by a colon...
ALPHA / DIGIT ; obsolete, usage is deprecated or, in the form of a syntaxdiagram, as: The leading scheme (urn:) is case-insensitive. <NID> is the namespace...
making them distinct from the abstract syntax trees used in computer programming. Unlike Reed-Kellogg sentence diagrams used for teaching grammar, parse trees...
authority = [userinfo "@"] host [":" port] This is represented in a syntaxdiagram as: The URI comprises: A non-empty scheme component followed by a colon...
diagram is a widely used diagram style that shows the logical relation between sets, popularized by John Venn (1834–1923) in the 1880s. The diagrams are...
ISBN 978-1-933633-10-7. Mazziotta, N. (2016). "Drawing syntax before syntactic trees: Stephen Watkins Clark's sentence diagrams (1847)". Historiographia Linguistica, 43(3)...
often used for scoping functions and operators and for arrays. In syntaxdiagrams they are used for grouping, such as in extended Backus–Naur form. In...
Intelligence. I. K. International Pvt Ltd. pp. 324–. ISBN 978-81-906566-6-5. Syntaxdiagram Computational linguistics Context free language Finite state machine...
modeling in OPM. Object process diagram (OPD) OPD is the one and only kind of diagram of OPM. This uniqueness of diagram kind is a major contributor to...
Space syntax is a set of theories and techniques for the analysis of spatial configurations. It was conceived by Bill Hillier, Julienne Hanson, and colleagues...
units correlates with the structure of the language or syntax. This is referred to as syntax-semantics interface. The study of lexical semantics concerns:...
universal grammar. The generative approach has focused on the study of syntax while addressing other aspects of language including semantics, morphology...
IDEs also have a class browser, an object browser, and a class hierarchy diagram for use in object-oriented software development. Integrated development...
form, IDEF0 includes both a definition of a graphical modeling language (syntax and semantics) and a description of a comprehensive methodology for developing...
both the terms "tree structure" and "tree-diagram" from 1965 in Noam Chomsky's Aspects of the Theory of Syntax. In a tree structure there is one and only...
and ideas, visualized with the use of diagrams and imagery instead of by linguistic or algebraic means. A diagram is a 2D geometric symbolic representation...
sentence that has no discernible meaning, thus arguing for the independence of syntax (the study of sentence structures) from semantics (the study of meaning)...
Parsing, syntax analysis, or syntactic analysis is the process of analyzing a string of symbols, either in natural language, computer languages or data...
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