<script> tag in the <head> of an HTML document, with properties and values in JSON form following the schema.org vocabulary. This standard is used by Google and others to display enriched content in search results.<head> or <body>, using HTML tag properties and values following the schema.org vocabulary. This standard is also used by Google and others to display enriched content in search results.<meta> tags: Embed metadata in multiple <meta> tags in the <head> of an HTML document, using HTML tag properties and values following the Open Graph protocol. This standard is used by Facebook and others to display enriched content in social media posts.@context: Collection in which the schema is defined. Should always be "http://schema.org" or "https://schema.org".@type: Type of schema used. For articles, should be one of Article, TechArticle, NewsArticle (or one of its sub-types), BlogPosting (or one of its sub-types).articleSection (Text): One or more sections assigned to the article. Multiple sections may be expressed as a single string delimited by commas or as an array of strings.author (Text, Person, or Organization): One or more authors of the article. If not specified, the creator property is checked. Multiple authors may be expressed as a single string delimited by commas, an array of strings, or an array of Person or Organization items.headline (Text): Title of the article. If not specified, the alternativeHeadline and name properties are checked, in that order.keywords (Text): One or more subject matter tags associated with the article. Multiple keywords may be expressed as a single string delimited by commas or as an array of strings.thumbnailUrl (Text): URL of the main image associated with the article. If not specified, the image property (Text or ImageObject) is checked.itemprop: Adds a property to an HTML element.itemscope: Works in conjunction with itemtype to specify the type of item associated with a particular HTML element.itemtype: Provides the URL of the (schema.org) vocabulary item associated with the HTML element, and gives the context for its constituent itemprop properties.<meta> tags<meta> tags in the <head> element, identified with tag properties specified by the Open Graph protocol. Chartbeat mostly follows the official specification, but allows alternate forms of some properties for your convenience. This format was designed to incorporate webpages into a "social graph", and as such, includes fewer properties in more restrictive data structures.og:image (url): URL of the image used to represent the article within a social graph. If not specified, og:image:url is checked.article:modified_time (datetime): Date and (optionally) time the article was last modified. If not specified, og:updated_time is checked.article:published_time (datetime): Date and (optionally) time the article was first published. If not specified, og:pubdate is checked.article:section (string): One or more sections assigned to the article. Multiple sections may be expressed as a single string delimited by commas.article:content_tier (enum): Access tier assigned to article by its publisher. Should be one of free, metered, or locked.og:locale (string): Locale in which the article's tags are marked up. Should be formatted as language_TERRITORY, e.g. en_US.og:site_name (string): Name of the site on which the article appears. If not specified, article:publisher is checked.og:video (url): URL of the video used to represent the article within a social graph. If not specified, og:video:url is checked. Chartbeat-ContentX/0.3 (http://www.chartbeat.com). Note that the version number (e.g. 0.3) will change over time. To prevent unsuccessful scrapes and ensure that every page has associated metadata, please add this UserAgent to your site's whitelist.