seo优化之open-graph-protocal

什么是og

og是一种新的HTTP头部标记,由 Facebook在 2010年F8会议上公布的一套开放内容协议(Open Graph Protocol),任何网页只要遵守该协议,SNS就能从页面上提取最有效的信息并呈现给用户。

可以查看官网进行更深入的了解——<http://ogp.me/

按照百度百科的信息:

Open Graph通讯协定(Protocol)本身是一种制定一套Metatags的规格,用来标注你的页面,告诉我们你的网页代表哪一类型的现实世界物件。另一伙伴网站,即Amazon旗下的Internet Movie Database(IMDb),将用这个Open Graph Protocol为每一部电影标注页面。按下IMDb上的“赞”按钮,就会自动把那部电影加入Facebook使用者profile中的“最爱的电影”。

Facebook已和Yahoo、Twitter合作采用OAuth 2.0认证标准。Graph API翻新了Facebook的平台程序代码,让Facebook里的每个物件都拥有独特的ID。通过Open Graph把其他社交网站建构的网络给连接起来,将创造一个更聪明、更与社交连接、更个人化也更具语意意识的网络。

OG 的意义

当用户将网页分享到facebook、twitter或者微博的时候,sns网站中的内容是按照我们og属性规定内容呈现的,以此保证信息分享更准确更符合作者所想。

搜索引擎机器人爬取的是我们的页面,即html代码,meta信息尤为关注,所以我们增加的og meta标签是可以别搜索引擎发现并评估权重的,将原有meta信息优化手段同时使用到og:title这种属性值当中,加强meta信息优化内容, 对于权重提升和排名还是很有利的。

OG的应用

基本使用

要将网页转换为图形对象,您需要将基本元数据添加到页面中。每个页面的四个必需属性是:

  • og:title - 对象标题,例如“The Rock”。
  • og:type- 对象类型
  • og:image - 图片网址。
  • og:url - 网页的永久URL,例如“http://www.imdb.com/title/tt0117500/”。

以下是IMDB上Rock的Open Graph协议标记:

<html prefix="og: http://ogp.me/ns#">
<head>
<title>The Rock (1996)</title>
<meta property="og:title" content="The Rock" />
<meta property="og:type" content="video.movie" />
<meta property="og:url" content="http://www.imdb.com/title/tt0117500/" />
<meta property="og:image" content="http://ia.media-imdb.com/images/rock.jpg" />
...
</head>
...
</html>

视频video

og:videosrc 视频资源链接,例如可是播放视频的flash地址

og:width 视频的宽度 可为空 允许多个

og:height 视频的高度 可为空 允许多个

音频audio

og:audiosrc 不可为空 允许多个 音乐资源链接,例如可是播放歌曲的flash地址

og:artist 音乐家 可为空 需唯一

og:abstract 内容摘要 可为空 允许多个

og:contentid 可为空 唯一 内容主体的ID,用来标识当前页面主要内容所处的HTML标签的ID

图片photo

og:photo 图片列表 可为空 允许多个

og:width 图片宽度 可为空 允许多个

og:height 图片高度 可为空 允许多个

商品product

og:price 产品价格 不可为空 需唯一

og:description 产品描述 不可为空 需唯一

og:nick 店铺名 不可为空 需唯一

og:postfee 运费 不可为空 需唯一

Music

og:type :

music.song

  • music:duration - integer >=1 - The song’s length in seconds.
  • music:album - music.album array - The album this song is from.
  • music:album:disc - integer >=1 - Which disc of the album this song is on.
  • music:album:track - integer >=1 - Which track this song is.
  • music:musician - profile array - The musician that made this song.

music.album

  • music:song - music.song - The song on this album.
  • music:song:disc - integer >=1 - The same as music:album:disc but in reverse.
  • music:song:track - integer >=1 - The same as music:album:track but in reverse.
  • music:musician - profile - The musician that made this song.
  • music:release_date - datetime - The date the album was released.

music.playlist

  • music:song - Identical to the ones on music.album
  • music:song:disc
  • music:song:track
  • music:creator - profile - The creator of this playlist.

music.radio_station

  • music:creator - profile - The creator of this station.

Video

og:type values:

video.movie

  • video:actor - profile array - Actors in the movie.
  • video:actor:role - string - The role they played.
  • video:director - profile array - Directors of the movie.
  • video:writer - profile array - Writers of the movie.
  • video:duration - integer >=1 - The movie’s length in seconds.
  • video:release_date - datetime - The date the movie was released.
  • video:tag - string array - Tag words associated with this movie.

video.episode

  • video:actor - Identical to video.movie
  • video:actor:role
  • video:director
  • video:writer
  • video:duration
  • video:release_date
  • video:tag
  • video:series - video.tv_show - Which series this episode belongs to.

video.tv_show

A multi-episode TV show. The metadata is identical to video.movie.

video.other

A video that doesn’t belong in any other category. The metadata is identical to video.movie.

article

article - Namespace URI: http://ogp.me/ns/article#

  • article:published_time - datetime - When the article was first published.
  • article:modified_time - datetime - When the article was last changed.
  • article:expiration_time - datetime - When the article is out of date after.
  • article:author - profile array - Writers of the article.
  • article:section - string - A high-level section name. E.g. Technology
  • article:tag - string array - Tag words associated with this article.

book

book - Namespace URI: http://ogp.me/ns/book#

  • book:author - profile array - Who wrote this book.
  • book:isbn - string - The ISBN
  • book:release_date - datetime - The date the book was released.
  • book:tag - string array - Tag words associated with this book.

profile

profile - Namespace URI: http://ogp.me/ns/profile#

  • profile:first_name - string - A name normally given to an individual by a parent or self-chosen.
  • profile:last_name - string - A name inherited from a family or marriage and by which the individual is commonly known.
  • profile:username - string - A short unique string to identify them.
  • profile:gender - enum(male, female) - Their gender.

website

website - Namespace URI: http://ogp.me/ns/website#

其他可选

以下属性对于任何对象都是可选的,通常建议:

  • og:determiner - 标题之前出现的单词。(a,an,“”,auto)等,默认是“”(空白)。
  • og:locale- 这些标签所在的区域设置。格式language_TERRITORY。默认是en_US
  • og:locale:alternate- 此页面可用的其他语言环境数组。
  • og:site_name - 如果网页是大网站的一部分,则应显示整个网站的名称。例如“IMDb”。

例如:

<meta property="og:audio" content="http://example.com/bond/theme.mp3" />
<meta property="og:description" 
  content="Sean Connery found fame and fortune as the
           suave, sophisticated British agent, James Bond." />
<meta property="og:determiner" content="the" />
<meta property="og:locale" content="en_GB" />
<meta property="og:locale:alternate" content="fr_FR" />
<meta property="og:locale:alternate" content="es_ES" />
<meta property="og:site_name" content="IMDb" />
<meta property="og:video" content="http://example.com/bond/trailer.swf" />

更详细的请参考下文的参考资料。

参考资料


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