--- title: Structured data description: The schema.org JSON-LD every page carries — WebSite, article, and breadcrumb nodes — plus the optional Organization and SoftwareApplication blocks that tell search engines and agents who you are. --- Blume emits [schema.org](https://schema.org) JSON-LD in every page's `` so search engines understand your content. On by default: ```ts blume.config.ts lineNumbers seo: { structuredData: true, } ``` Each page includes: - a **WebSite** node for site identity, - the page as an **article** — `BlogPosting` for blog posts, `TechArticle` for changelog and docs — with its description and publish date, - a **BreadcrumbList** built from the navigation trail. URLs are absolute when [`deployment.site`](/docs/deployment) is set. Pages marked [`seo.noindex`](/docs/discoverability/metadata#per-page-overrides) are skipped. When [`lastModified`](/docs/configuration#last-modified) is on, each page's date is also emitted as `dateModified`. ## Site identity The WebSite node says a site exists; it doesn't say _what_ it is or _who_ runs it — which is what AI agents read JSON-LD for before they recommend or cite you. Two optional blocks fill that in, both needing `deployment.site` (the nodes carry absolute identifiers): ```ts blume.config.ts lineNumbers seo: { organization: { name: "Acme", // defaults to the site title email: "hello@acme.com", telephone: "+1 555 0100", address: { addressLocality: "Sydney", addressCountry: "AU" }, logo: "/logo.svg", sameAs: ["https://github.com/acme", "https://x.com/acme"], }, software: { license: "MIT", operatingSystem: "Node.js 22+", price: 0, // emitted as an Offer; 0 marks it free sameAs: ["https://www.npmjs.com/package/acme"], }, } ``` `organization` adds an **Organization** node to every page — the WebSite and article nodes cite it as `publisher` — with the email and telephone as a `ContactPoint` (`contactType` defaults to `"customer support"`) and the address as a `PostalAddress`, the two fields business-verification checks look for. `name` and `url` default to the site's; a root-relative `logo` is absolutized like any page URL. `software` adds a **SoftwareApplication** node to the homepage: the product's name and description (defaulting to the site's), `applicationCategory` (default `"DeveloperApplication"`), operating system, license, an `Offer` when `price` is set, and the registry or repository URLs in `sameAs`. Pass `software: true` to take every default. The organization, when configured, is cited as its `publisher`. ## Custom pages A custom [`.astro` page](/docs/advanced/custom-pages) rendered through `PageLayout` emits the same `WebSite` graph, so a marketing home page isn't the one URL without structured data. Pass `structuredDataEnabled={config.structuredData}` to keep it in sync with this setting, or `structuredDataEnabled={false}` to turn it off for that page alone.