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Attributes accesskey (attribute) class (attribute) contenteditable (attribute) contextmenu (attribute) data-* (attribute) dir (attribute) draggable (attribute) dropzone (attribute) Global attributes hidden (attribute) id (attribute) itemid (attribute) itemprop (attribute) itemref (attribute) itemscope (attribute) itemtype (attribute) lang (attribute) slot (attribute) spellcheck (attribute) style (attribute) tabindex (attribute) title (attribute) translate (attribute) Elements a abbr address area article aside audio b base bdi bdo blockquote body br button canvas caption cite code col colgroup data datalist dd del details dfn dialog div dl dt em embed fieldset figcaption figure footer form h1 head header hr html i iframe img input input type="button" input type="checkbox" input type="color" input type="date" input type="datetime"-local input type="email" input type="file" input type="hidden" input type="image" input type="month" input type="number" input type="password" input type="radio" input type="range" input type="reset" input type="search" input type="submit" input type="tel" input type="text" input type="time" input type="url" input type="week" ins kbd label legend li link main map mark menu menuitem meta meter nav noscript object ol optgroup option output p param picture pre progress q rp rt rtc ruby s samp script section select slot small source span strong style sub summary sup table tbody td template textarea tfoot th thead time title tr track u ul var video wbr Miscellaneous Attributes Block-level elements CORS enabled image CORS settings attributes Element Inline elements Kinds of HTML content Link types Microdata Optimizing your pages for speculative parsing Preloading content Reference Supported media formats Using the application cache Obsolete acronym applet basefont big blink center command content dir element font frame frameset hgroup image input type="datetime" isindex keygen listing marquee nextid noframes plaintext strike tt xmp
characters

itemid全局屬性是某個項目的唯一全局標識符。itemid屬性只能為既具有元素指定itemscopeitemtype屬性。此外,itemid只能在具有itemscope相應屬性的元素上指定itemtype或引用支持全局標識符的詞匯表。

itemtype全局標識符的確切含義由指定詞匯表中該標識符的定義提供。詞匯表定義是否有多個具有相同全局標識符的項目可以共存,如果是,則處理具有相同標識符的項目。

注意: Whatwg.org 定義指定itemid必須是 URL 。但是,以下示例正確說明也可以使用 URN 。這種不一致可能反映了 Microdata 規(guī)范的不完整性。

例子

HTML

<dl itemscope
    itemtype="http://vocab.example.net/book"
    itemid="urn:isbn:0-330-34032-8"><dt>Title <dd itemprop="title">The Reality Dysfunction<dt>Author <dd itemprop="author">Peter F. Hamilton<dt>Publication date<dd><time itemprop="pubdate" datetime="1996-01-26">26 January 1996</time> </dl>

結構化數(shù)據(jù)

itemscope

itemtype: itemid

http://vocab.example.net/book: urn:isbn:0-330-34032-8

itemprop

title

The Reality Dysfunction

itemprop

author

Peter F. Hamilton

itemprop

pubdate

1996-01-26

結果

規(guī)范

Specification

Status

Comment

itemid


WG Note - No longer being actively developed

瀏覽器兼容性

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)

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