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The global attribute itemref
Properties that are not descendants of an element with the itemscope
attribute can be associated with the item using an itemref
. itemref
provides a list of element id's (not itemid
s) with additional properties elsewhere in the document.
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.
Example
HTML
<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> </div>
Structured data
id's | itemscope | itemref | (itemprop name) | (itemprop value) | |
---|---|---|---|---|---|
id=amanda | itemscope | itemref=a,b | |||
id=a | itemprop | name | Amanda | ||
id=b | itemscope | itemref=c | band | ||
id=c | itemprop | Band | Jazz Band | ||
itemprop | Size | 12 |
Result
Specifications
Specification | Status | Comment |
---|---|---|
itemref |
WG Note - No longer being actively developed |
Browser compatibility
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |