Welcome to JSON Schema

JSON Schema is a vocabulary that allows you to validate, annotate, and manipulate JSON documents.

This repository contains the sources for the work in progress of the next set of JSON Schema IETF Internet Draft (I-D) documents. For the latest released I-Ds, please see the Specification page on the website.

Call for contributions and feedback

Reviews, comments and suggestions are most welcome! Please read our guidelines for contributing.

Status

For the current status of issues and pull requests, please see the following labels

Labels are assigned based on Sensible Github Labels.

Authoring and Building

Specification

To build all the spec files to HTML from the Markdown sources, run npm run build -- specs. You can also build each individually with npm run build -- specs/filename.md (Example: npm run build -- specs/jsonschema-core.md). You can also use wildcards to build multiple specs at the same time: npm run build -- specs/jsonschema-*.md. The HTML files will be available in the web folder.

The spec is built using Remark, a markdown engine with good support for plugins and lots of existing plugins we can use. Remark also has a language server and a VSCode extension we can use to get linting and link checking while developing the spec.

Plugins

The following is a not-necessarily-complete list of configured plugins and the features they make available to you.

• remark-lint -- Enforce markdown style guide.
• remark-validate-links -- Check for broken links.
• remark-gfm -- Adds support for GitHub Flavored Markdown specific markdown features such as autolink literals, footnotes, strikethrough, tables, and tasklists.
• remark-heading-id -- Adds support for {#my-anchor} syntax to add an id to an element so it can be referenced using URI fragment syntax.
• remark-headings -- A collection of enhancements for headings.
  • Adds hierarchical section numbers to headings.
    • Use the %appendix% prefix on headings that should be numbered as an appendix.
  • Adds id anchors to headers that don't have one
    • Example: #section-2-13
    • Example: #appendix-a
  • Makes the heading a link utilizing its anchor
• remark-reference-links -- Adds new syntax for referencing a section of the spec using the section number as the link text.
  • Example:

    ## Foo {#foo}
    ## Bar
    This is covered in {{foo}} // --> Renders to "This is covered in [Section 2.3](#foo)"
    - Link text will use "Section" or "Appendix" as needed

• remark-table-of-contents -- Adds a table of contents in a section with a header called "Table of Contents".
• remark-code-titles -- Add titles to code blocks
  • Example:

    \`\`\`jsonschema "My Fun Title"
    { "type": "string" }
    \`\`\`

  • The languages jsonschema and json have special styling
  • The title will be parsed as a JSON string, but you have to double escape escaped characters. So, to get My "quoted" title, you would need to be "My \\\\"quoted\\\\" title".
• rehype-highlight -- Syntax highlighting.
• rehype-highlight-code-lines -- Adds line numbers to code blocks. Supports ranges.
• remark-flexible-containers -- Add a callout box using the following syntax. Supported container types are warning, note, and experimental.

  ::: {type} {title}
  {content}
  :::

Internet-Drafts

To build components that are being maintained as IETF Internet-Drafts, run npm run build-ietf.

Descriptions of the xml2rfc, I-D documents, and RFC processes:

• https://xml2rfc.tools.ietf.org/authoring/draft-mrose-writing-rfcs.html
• https://www.ietf.org/tao.html
• https://www.ietf.org/ietf-ftp/1id-guidelines.html
• https://www.rfc-editor.org/rfc/rfc7322.txt

Test suites

Conformance tests for JSON Schema and its vocabularies may be found in their own repository.

Tests for the meta-schema are included here. Run npm test to run the meta-schema tests. To get a test coverage report, you can use npm run test:coverage. In addition to the CLI report, a detailed HTML report will be generated in the coverage directory and can be viewed using something like npx http-server coverage.

The website

The JSON Schema web site is at http://json-schema.org/

The source for the website is maintained in a separate repository.

Contributors

Code Contributors

This project exists thanks to all the people who contribute. [Contribute].

Financial Contributors

Become a financial contributor and help us sustain our community. [Contribute]

Sponsors

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Individuals

License

The contents of this repository are licensed under either the BSD 3-clause license or the Academic Free License v3.0.