Properties that are not descendants of an element with the itemscope attribute can be associated with an item using the global attribute itemref.

itemref provides a list of element IDs (not itemids) elsewhere in the document, with additional properties

The itemref attribute can only be specified on elements that have an itemscope attribute specified.

Note: the itemref attribute is not part of the microdata data model. It is merely a syntactic construct to aid authors in adding annotations to pages where the data to be annotated does not follow a convenient tree structure. For example, it allows authors to mark up data in a table so that each column defines a separate item while keeping the properties in the cells.



<div itemscope id="amanda" itemref="a b"></div>
<p id="a">Name: <span itemprop="name">Amanda</span> </p>
<div id="b" itemprop="band" itemscope itemref="c"></div>
<div id="c">
    <p>Band: <span itemprop="name">Jazz Band</span> </p>
    <p>Size: <span itemprop="size">12</span> players</p>

Structured data

(in JSON-LD format)

  "@id": "amanda",
  "name": "Amanda",
  "band": {
    "@id": "b",
    "name": "Jazz Band",
    "size": 12



Specification Status Comment
HTML Microdata
The definition of 'itemref' in that specification.
Working Draft
HTML Living Standard
The definition of 'itemref' in that specification.
Living Standard

Browser compatibility

ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
itemrefChrome Full support YesEdge Full support 12Firefox Full support YesIE Full support YesOpera Full support YesSafari Full support YesWebView Android Full support YesChrome Android Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes


Full support
Full support

See also