Web Data Commons
The Web Data Commons project extracts structured data from the Common Crawl, the largest web corpus available to the public, and provides the extracted data for public download in order to support researchers and companies in exploiting the wealth of information that is available on the Web. News 2025-01-10: We have released the WDC RDFa, Microdata, Microformat, and Embedded JSON-LD data sets extr
HTML Data Guide
HTML Data GuideW3C Interest Group Note 08 March 2012This version:http://www.w3.org/TR/2012/NOTE-html-data-guide-20120308/Latest published version:http://www.w3.org/TR/html-data-guide/Previous version:http://www.w3.org/TR/2012/WD-html-data-guide-20120112/Editor:Jeni Tennison, Independent Copyright © 2011-2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C liability, trademark and document use ru
Google Structured Data Testing Tool
Send feedback Stay organized with collections Save and categorize content based on your preferences. Google recommends that you start with the Rich Results Test to see what Google rich results can be generated for your page. For generic schema validation, use the Schema Markup Validator to test all types of schema.org markup, without Google-specific validation.
マイクロフォーマット(microformats) vs. マイクロデータ(microdata) - 檜山正幸のキマイラ飼育記 (はてなBlog)
「マイクロフォーマット（microformats）の蹉跌と希望」において、マイクロフォーマット（microformats）のデータモデルもマークアップも曖昧すぎて、どうもダメな感じだと指摘しました。しかしそれでも、次の点はマイクロフォーマットの優位点だと僕は思います： 今ある技術だけですぐさま出来る、新しいナニカを必要としない。 CSSデザインとの相性がよい。 hCard、hCalendarなどのスキーマが既に存在する。 特に最後の「スキーマのレパートリーがある」という点はとても大きな魅力です。もっとも、スキーマ記述言語がない（しいて言えば自然言語）ので、スキーマって概念も曖昧な状態ではありますが。 「マイクロフォーマット（microformats）の蹉跌と希望」のコメント欄にて、神崎正英さんより「microdataはどうか」というヒントをいただきました。Kuwataさんも「microda
リッチ スニペットと構造化データについて - ウェブマスター ツール ヘルプ
SEO fundamentals Introduction Search Essentials SEO Starter Guide How Google Search Works Do you need an SEO? Crawling and indexing Sitemaps robots.txt Meta tags Crawler management Removals Canonicalization Redirects JavaScript SEO Ranking and search appearance Visual Elements gallery Title links Snippets Images Videos Structured data Favicons Site-specific guides Ecommerce International and multi
microformats.org at 5: Two Billion Pages With hCards, 94% of Rich Snippets – Microformats
microformats.org at 5: Two Billion Pages With hCards, 94% of Rich Snippets The microformats.org community recently celebrated its 5th birthday – five plus years of openly researching, creating, and iterating on web standards to express common semantics designed for humans first, machines second. Originally brainstormed in September 2004, and rapidly adopted by numerous tools, sites, large and smal
Freebase
Send feedback Data Dumps Stay organized with collections Save and categorize content based on your preferences. outlined_flag The Freebase API has been shut down, but the last available data dump is accessible. Historical data dumps are outdated and not maintained or supported, but are hosted for their citation in studies and potential contribution to open data efforts. Freebase Data Dumps are pro
Extending HTML5 — Microformats | HTML5 Doctor
While HTML5 has a bunch of semantic elements, including new ones like <article> and <nav>, sometimes there just isn’t an element with the right meaning. What we want are ways to extend what we’ve got, to add extra semantics that are machine-readable — data that a browser, script, or robot can use. Native ways to extend HTML There were five fundamental ways we could extend HTML 4: <meta> element cl
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Sindice - The semantic web index