What Is This?

This is an HTML+RDFa representation of metadata describing this Web-addressable resource.

Why Is This Important?

The property (attributes and values pairs) links on this page unveil a different kind of link, one which enables the following on HTTP networks such as the Web:

Unambiguous identity for entities (aka. strong identifiers)
Implicit binding of an entity and its metadata via strong identifiers
Multiple metadata representations that enable a variety of presentations
High precision Search and Find queries that simply use the metadata documents (by referencing entity URIs) as the query's Data Source Name

How Do I Discover Alternative Metadata Representations?

This document exposes metadata in the following formats: (X)HTML+RDFa, Turtle, N3, RDF/JSON, or RDF/XML. In the most basic form, you can simply view the (X)HTML source markup of this page, and go directly to the <head/> section which contains a <link/> tag with relationship and type properties for each format.

In addition, you can also explicitly request a desired metadata representation for a given resource via HTTP GET requests that use the entity's strong identifier as the call target.

How Can I Expose My Web Resources In This Manner?

Simply include the following in the <head/> section of your (static or dynamically generated) (X)HTML page:

<link rel="alternate" title="My Data in RDF Linked Data form"
type="application/rdf+xml"
href="http://linkeddata.uriburner.com/about/id/<this-page-URL>/>"

How Is This Related To The Linked Data Meme?

As stated above, the links in this page expose strong identifiers for its primary topic, secondary topics, attributes, and some values. These links, via implicit association, act as conduits to their metadata-bearing documents, in a variety formats.

content	<p>Your browser does not support iframes.</p>
Description	The HTTP Last-Modified response header contains a date and time when the origin server believes the resource was last modified. It is used as a validator in conditional requests (If-Modified-Since or If-Unmodified-Since) to determine if a requested resource is the same as one already stored by the client. It is less accurate than an ETag for determining file contents, but can be used as a fallback mechanism if ETags are unavailable.
Title	Last-Modified - HTTP \| MDN Last-Modified header - HTTP \| MDN
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https://developer.mozilla.org/en-US/plus/docs/features/overview https://developer.mozilla.org/en-US/plus/docs/faq https://developer.mozilla.org/en-US/curriculum/ https://developer.mozilla.org/en-US/blog/ https://developer.mozilla.org/en-US/play https://developer.mozilla.org/en-US/observatory https://github.com/orgs/mdn/discussions/739 https://developer.mozilla.org/en-US/docs/Glossary/Baseline/Compatibility https://github.com/mdn/content/blob/main/CONTRIBUTING.md https://developer.mozilla.org/ https://twitter.com/mozdevnet https://github.com/mdn/ https://developer.mozilla.org/en-US/blog/rss.xml https://developer.mozilla.org/en-US/about https://www.mozilla.org/en-US/careers/listings/?team=ProdOps https://developer.mozilla.org/en-US/advertising https://support.mozilla.org/products/mdn-plus https://developer.mozilla.org/en-US/docs/MDN/Community/Issues https://developer.mozilla.org/en-US/community https://discourse.mozilla.org/c/mdn/236 https://developer.mozilla.org/discord https://developer.mozilla.org/en-US/docs/Learn https://hacks.mozilla.org/ https://www.mozilla.org/ https://www.mozilla.org/privacy/websites/ https://www.mozilla.org/privacy/websites/#cookies https://www.mozilla.org/about/legal/terms/mozilla https://www.mozilla.org/about/governance/policies/participation/ https://www.mozilla.org https://foundation.mozilla.org/ https://developer.mozilla.org/en-US/do...g_guidelines/Attrib_copyright_license https://developer.mozilla.org/en-US/ https://bsky.app/profile/developer.mozilla.org https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CORS https://developer.mozilla.org/en-US/do...Headers/Permissions-Policy/summarizer https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/If-Match https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Overview https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Evolution_of_HTTP https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Session https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Messages https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/MIME_types https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Compression https://developer.mozilla.org/en-US/do...ides/Compression_dictionary_transport https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Caching https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Authentication https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Cookies https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Redirections https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Conditional_requests https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Range_requests https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Content_negotiation https://developer.mozilla.org/en-US/do...des/Connection_management_in_HTTP_1.x https://developer.mozilla.org/en-US/do...TTP/Guides/Protocol_upgrade_mechanism https://developer.mozilla.org/en-US/do...TP/Guides/Proxy_servers_and_tunneling https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Client_hints https://developer.mozilla.org/en-US/do...urity/Practical_implementation_guides https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/Permissions_Policy https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CSP https://developer.mozilla.org/en-US/do...P/Guides/Cross-Origin_Resource_Policy https://developer.mozilla.org/en-US/docs/Web/HTTP/Guides/CORS/Errors https://developer.mozilla.org/en-US/do.../HTTP/Guides/CORS/Errors/CORSDisabled https://developer.mozilla.org/en-US/do...rors/CORSAllowOriginNotMatchingOrigin https://developer.mozilla.org/en-US/do...es/CORS/Errors/CORSMissingAllowOrigin https://developer.mozilla.org/en-US/do.../CORS/Errors/CORSOriginHeaderNotAdded https://developer.mozilla.org/en-US/do...ORS/Errors/CORSPreflightDidNotSucceed 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https://ogp.me/ns#description	The HTTP Last-Modified response header contains a date and time when the origin server believes the resource was last modified. It is used as a validator in conditional requests (If-Modified-Since or If-Unmodified-Since) to determine if a requested resource is the same as one already stored by the client. It is less accurate than an ETag for determining file contents, but can be used as a fallback mechanism if ETags are unavailable.
https://ogp.me/ns#image	https://developer.mozilla.org/mdn-social-share.d893525a4fb5fb1f67a2.png
https://ogp.me/ns#image:alt	The MDN Web Docs logo, featuring a blue accent color, displayed on a solid black background.
https://ogp.me/ns#image:height	1080
https://ogp.me/ns#image:type	image/png
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https://ogp.me/ns#locale	en_US
https://ogp.me/ns#site_name	MDN Web Docs
https://ogp.me/ns#title	Last-Modified - HTTP \| MDN Last-Modified header - HTTP \| MDN
https://ogp.me/ns#type	website
https://ogp.me/ns#url	https://developer.mozilla.org/en-US/docs/Web/HTTP/Reference/Headers/Last-Modified

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