Practical format definitions for common document patterns. Each example uses the Parse SDK (findAll, textContent, inlineText, isCodeBlock, extractTodoItems) for parsing and datamark/stringify (heading, list, codeBlock, frontmatter) for serialization.

Basic Format

Simple heading + body extraction with inlineText and textContent

Blog Post

Typed frontmatter + body content with textContent and frontmatter()

Todo List

Checkbox items with extractTodoItems and list()

API Documentation

Endpoints, parameters, and JSON code blocks with findAll and codeBlock()

Changelog

Versioned release notes with regex heading parsing and list()

Recipe

Frontmatter metadata + ingredients + step sections with section walking

Meeting Notes

Attendees, agenda, and tracked action items with extractTodoItems

Pattern: Three imports

Every format definition imports from three places:

import { datamark } from "datamark";
import { inlineText, textContent, findAll, isCodeBlock } from "datamark/parse";
import { heading, list, codeBlock, frontmatter } from "datamark/stringify";

datamark gives you the format factory
datamark/parse gives you AST traversal and extraction utilities
datamark/stringify gives you builder functions for clean Markdown output

This separation keeps your imports explicit: the format system on one side, parsing on another, serialization on the third.

Examples