HTML microdata

HTML microdata, an HTML5 specification, is used to label content to describe a specific type of information. It is machine-readable data that is embedded in HTML documents and compatible with other data formats, including RDF and JSON. The purpose of the microdata specification is to help automated programs to better understand the content of your web page.

Microdata Item Types and Properties

Microdata could include information types such as reviews, personal information or events. Each information type has its own properties. For example properties of an event include venue, starting time, name, and category. Microdata is implemented using attributes in HTML tags, typically or is used to assign descriptive names to properties.

The basic syntax for HTML microdata consists of a group of name-value pairs. The groups are called items, and each name-value pair is a property. The HTML microdata specification defines five attributes that can be applied to any HTML5 tag:

  • Itemscope: Indicates the element is a microdata element and its child elements are part of its microdata format.
  • Itemtype: Defines the vocabulary to be used by the microdata format.
  • Itemid: The unique identifier of the item, if defined by the microdata vocabulary.
  • Itemprop: An individual data element.
  • Itemref: Allows a microdata element to reference another element on the page to define it by either HTML id or by itemid.

Recommended Reading: Learn more about the five attributes in this Web Developer Tutorial.

The W3C HTML Microdata Specification

The syntax and code examples are available in the W3C HTML Microdata specification. The W3C HTML Working Group is the W3C working group responsible for the HTML microdata specification.

Previous articleAnti-Malware
Next articleMiracast
Vangie Beal
Vangie Beal
Vangie Beal is a freelance business and technology writer covering Internet technologies and online business since the late '90s.

Top Articles

Huge List Of Texting and Online Chat Abbreviations

From A3 to ZZZ we list 1,559 text message and online chat abbreviations to help you translate and understand today's texting lingo. Includes Top...

How To Create A Desktop Shortcut To A Website

This Webopedia guide will show you how to create a desktop shortcut to a website using Firefox, Chrome or Internet Explorer (IE). Creating a desktop...

The History Of Windows Operating Systems

Microsoft Windows is a family of operating systems. We look at the history of Microsoft's Windows operating systems (Windows OS) from 1985 to present...

Hotmail [Outlook] Email Accounts

  By Vangie Beal Hotmail is one of the first public webmail services that can be accessed from any web browser. Prior to Hotmail and its...

Unregulated Power Supply Definition...

An unregulated power supply is a system that transforms input voltage into direct...

Cybersecurity Awareness Training Definition...

Cybersecurity awareness training informs employees of the attack surfaces and vectors in their...

OST File Definition &...

An OST file, or offline storage table (.ost) file, is an Offline Outlook...