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| Schema | Format | Primary Use Case | Overlap with OGP | | :--- | :--- | :--- | :--- | | | RDFa in HTML | Social media sharing | Native | | Schema.org | JSON-LD, Microdata | Search engine SEO | Partial (image, name) | | Twitter Cards | Meta tags | Twitter-specific displays | High (often redundant) | | Dublin Core | XML/RDF | Document metadata | Low (no social graph) |

Unlikely. The URL is deeply embedded in billions of web pages. Even if Facebook abandons it, the decentralized nature of the web means scrapers will continue to respect the og: prefix. The ns attribute, however, will continue to fade into obsolescence as HTML5 dominates.

In technical terms, this is an that tells web crawlers your page uses specific Open Graph metadata. It is typically implemented in the or tag of your web page to define the "og" prefix used in meta tags.

<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>My Article</title> <!-- Open Graph Tags --> <meta property="og:title" content="The Future of Web Standards"> <meta property="og:type" content="article"> <meta property="og:url" content="https://example.com/future-web"> <meta property="og:image" content="https://example.com/images/og-image.jpg"> <meta property="og:description" content="Exploring Open Graph and its impact on social sharing."> <meta property="og:site_name" content="Example News">

Once the namespace is declared, you populate the <head> with meta

When you see property="og:title" , the og part tells the parser that title is not just any meta tag; it is a structured piece of social media metadata.

This line tells the browser and any scraping bots that the og vocabulary is defined at ogp.me .

| Property | RDF Term | Example Value | | :--- | :--- | :--- | | | og:title | "The Open Graph Protocol" | | Type | og:type | website (or article , video.movie , etc.) | | Image | og:image | https://ogp.me/logo.png | | URL | og:url | https://ogp.me/ |