https://arran4.github.io/header/docs/concepts/Recent content in Concepts on header — website metadata toolkitHugoen-ushttps://arran4.github.io/header/docs/concepts/metadata-and-rendering/Mon, 01 Jan 0001 00:00:00 +0000https://arran4.github.io/header/docs/concepts/metadata-and-rendering/<h1 id="extraction-and-rendering">Extraction and rendering<a class="anchor" href="#extraction-and-rendering" aria-label="Link"></a></h1> <p>The program first fetches a page and extracts its available metadata into a <code>PageInfo</code> value. Supported groups include Open Graph, Twitter Cards, JSON-LD, App Links, HTML link relationships and selected site-specific information.</p> <p>Different output styles render selected properties rather than changing the underlying extraction. The <code>json</code> style exposes structured fields; the Open Graph and Twitter styles focus on their respective families. This is why a field may be present in one style but omitted by design in another.</p>