* <code>Itemscopeitemscope</code> – Creates the Item and indicates that descendants of this [[HTML element|element]] contain information about it.<ref name="WHATWG"/> This attribute precedes the <code>itemtype</code> attribute in the HTML element’s tag.
* <code>Itemtypeitemtype</code> – A valid URL of a vocabulary that describes the item and its properties context.
* <code>ItemIditemid</code> – Indicates a unique identifier of the item in the vocabulary.
* <code>Itempropitemprop</code> – Indicates that its containing tag holds the value of the specified item property. The properties name and value context are described by the items vocabulary. Properties values usually consist of string values, but can also use [[URL]]s using the a element and its <code>href</code> attribute, the <code>img</code> element and its <code>src</code> attribute, or other elements that link to or embed external resources.<ref name=WHATWG/>
* <code>Itemrefitemref</code> -– Properties that are not descendants of the element with the <code>itemscope</code> attribute can be associated with the item using this attribute. Provides a list of elements to web crawlers to find additional property values of the item elsewhere in the document.<ref name="WHATWG"/>
