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Mermaid as a whole doesn't have a formally specified grammar. Individual diagrams have their grammar in a .jison file. Flowchart: https://github.com/mermaid-js

Mermaid as a whole doesn't have a formally specified grammar. Individual diagrams have their grammar in a .jison file. Flowchart: https://github.com/mermaid-js/mermaid/blob/develop/packages/mermaid/src/diagrams/flowchart/parser/flow.jison#L1 https://github.com/mermaid-js/mermaid/blob/develop/packages/... A single grammar to support all the different use cases would be challenging. But we did have some plans to introduce guidelines to make different diagram syntaxes more consistent.

jclermont 4y ago
I've had this need to render just part of a mermaid graph, and I thought of creating a parser to do it. Basically I'd like to render just the part of the graph that flows through a particular node. Before I go off and write my own parser using this grammar, would it be practical to do this in mermaid's parser already?