GitHub Twitter, what and why?

In this tutorial you will get an idea on what is and how it is useful

Keywords: schemaorg, markup, structured data



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License: CC-BY 4.0

Version: 2.1

Last Modified: 23 April 2021

◀ Previous tutorial: Overview of Bioschemas Tutorials | Next tutorial: markup examples

What is is a collaborative, community activity with a mission to create, maintain, and promote schemas for structured data on the Internet, on web pages, in email messages, and beyond. Structured data can be used to mark up all kinds of items from products to events to recipes.

Most sites and organizations will not have a reason to extend However, offers the ability to specify additional properties or sub-types to existing types.

The vocabulary can be used with many different encodings, including RDFa, Microdata and JSON-LD. These vocabularies cover entities, relationships between entities and actions, and can easily be extended through a well-documented extension model. Over 10 million sites use to markup their web pages and email messages. Many applications from Google, Microsoft, Pinterest, Yandex and others already use these vocabularies to power rich, extensible experiences.

Why use

As with any site nowadays; you’re competing in a crowded market-place. Ranking higher on search result pages or being included in 3rd party registries that receive more web-traffic can raise the exposure of your work to be seen by larger audiences. This is all achievable by following best practices and applying to your site.

  • Communicate with all the search engines
  • Enhance findability from search engine results
  • Provide context to an ambigous webpage
  • Metadata Interoperability and Standardization across all website using Formats markup can be embedded in your web page using Microdata, RDFa, or JSON-LD. In Bioschemas we favor the use of JSON-LD, as do most of the search engines.

Format examples

<script type="application/ld+json">
    "@context": "",
    "@type": "SportsTeam",
    "name": "San Francisco 49ers",
    "member": {
      "@type": "OrganizationRole",
      "member": {
        "@type": "Person",
        "name": "Joe Montana"
      "startDate": "1979",
      "endDate": "1992",
      "roleName": "Quarterback"
  • Microdata
<div itemscope itemtype="">
  <span itemprop="name">San Francisco 49ers</span>
  <div itemprop="member" itemscope
    <div itemprop="member" itemscope
      <span itemprop="name">Joe Montana</span>
    <span itemprop="startDate">1979</span>
    <span itemprop="endDate">1992</span>
    <span itemprop="roleName">Quarterback</span>
  • RDFa
<div vocab="" typeof="SportsTeam">
  <span property="name">San Francisco 49ers</span>
  <div property="member" typeof="OrganizationRole">
    <div property="member" typeof="">
      <span property="name">Joe Montana</span>
    <span property="startDate">1979</span>
    <span property="endDate">1992</span>
    <span property="roleName">Quarterback</span>

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