Schema.org


Rich snippets in SERP: SEO

Exhibit 18.8  Rich snippets in SERP.

Schema.org (aka Schema) is a collaborative effort initiated by Google, Microsoft and Yahoo! to develop and support a vocabulary of tags webmasters can add to their webpages (or HTML-formatted emails) to improve the way search engines (and email services) read and display content.

Improvements can be seen in the snippets describing the webpages in the search result pages (SERPs). For the pages that use Schema, the so called rich snippets provide additional information that help users gauge the relevance of the website.

For example, a property search listing may show average rating and the price range. Similarly, the search result for a cake recipe may show the average preparation time and calories, in addition to rating, as can be seen in Exhibit 18.8.

JSON-LD, microdata and RDFa are the most frequently used ways to mark up a webpage with Schema vocabulary. Though all three standards are widely supported, preference has varied over the years. Google currently recommends JSON-LD for all data types except breadcrumbs. This is probably because the format makes it easier to markup structured data, especially if it is generated programmatically from tools that support JSON. Whereas JSON-LD forms a block of code in the webpage (Google recommends adding it to the head section), separate from the presentation layer, microdata and RDFa embed the tags in the HTML of the webpages.


Schema.org - SEO: Information about a movie marked up using microdata

Exhibit 18.9  Information about a movie marked up using microdata.


Schema.org - SEO: nformation about a movie marked up using JSON-LD

Exhibit 18.10  Information about a movie marked up using JSON-LD.

Exhibit 18.9 depicts how information about a movie and its director is marked up using microdata. The attribute itemtype along with the schema URL mark the data as “movie”, and attribute itemscope defines the scope. The itemprop attribute is used to label properties. In this example, name, director and genre are the properties of the item, and name, birth date and death date are the properties of the property director.

Exhibit 18.10 depicts how the same information is marked up using JSON-LD.


Google’s Structured Data Markup Helper: SEO

Exhibit 18.11  Google’s Structured Data Markup Helper.

The required code may be generated using Google’s Structured Data Markup Helper (Exhibit 18.11). For details of how to use the marker click the Help button on the Helper’s menu.

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