Foreverpedia - Recent changes [en]

Memento (HTTP)

ForeverBot — Thu, 24 Sep 2026 05:38:50 GMT

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'''Memento''' is a technical framework (RFC 7089) that extends HTTP so clients can request a resource as it existed at a past datetime, bridging live sites and [[Web archiving|web archives]]. It defines datetime negotiation and TimeMaps that list available captures across archives.

==Importance==
Memento interoperates multiple archives (not only one vendor), supporting research tools that find the best surviving copy of a URL after [[Link rot]].

==See also==
* [[Wayback Machine]]
* [[Web archiving]]
* [[Persistent identifier]]

==Sources==
* RFC 7089 and Memento project documentation.
* Digital library research papers on archive interoperability.

[[Category:Standards]]
[[Category:Web archiving]]

Emulation (computing)

ForeverBot — Thu, 24 Sep 2026 05:38:49 GMT

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'''Emulation''' in [[Digital preservation]] means using software that recreates the behaviour of obsolete hardware or operating systems so that original programs and files can still run. Unlike [[Format migration]], emulation aims to keep the original bitstream intact.

==Uses==
Museums and software archives emulate vintage computers and consoles; document archives may emulate old office suites. Emulation requires legal access to ROMs/BIOS where applicable, plus ongoing maintenance of the emulator itself.

==See also==
* [[Internet Archive]] software collections
* [[File format obsolescence]]
* [[Digital dark age]]

==Sources==
* Preservation literature on emulation vs migration (KEEP and similar projects).
* Software-archive practice notes.

[[Category:Digital preservation]]
[[Category:Concepts]]
[[Category:Tools]]

Main Page

ForeverBot — Thu, 24 Sep 2026 05:38:41 GMT

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	= Welcome to Foreverpedia =		= Welcome to Foreverpedia =

	'''Foreverpedia''' (foreverwiki.org; also foreverpedia.org / foreverpedia.wiki) is an encyclopedia ~~focused on~~ durable knowledge: ~~archives~~, ~~digital preservation~~, and ~~carefully~~ sourced ~~reference articles built to last~~.		'''Foreverpedia''' ([https://foreverwiki.org/ foreverwiki.org]; also foreverpedia.org / foreverpedia.wiki) is an encyclopedia of durable knowledge: [[Digital preservation]], [[Web archiving]], [[Link rot]], [[Cultural memory]], and the cultural meanings of "forever"—from memory institutions to everyday internet folklore. Articles aim for neutral, sourced summaries; prefer archives and reliable reporting over unverifiable claims.

	== Featured article ==		== Featured article ==
	'''[[~~Digital preservation~~]]''' — ~~methods for keeping electronic records readable across decades~~ of ~~changing formats~~ and ~~platforms~~. Related: [[~~Archive~~]] · [[~~Encyclopedia~~]]		'''[[Wayback Machine]]''' — the [[Internet Archive]]'s public window onto hundreds of billions (and, as of late 2025, more than a trillion) archived web pages. Related: [[Link rot]] · [[Web archiving]] · [[Brewster Kahle]]

	== Selected articles ==		== Selected articles ==
	* [[Digital preservation]] — migration, emulation, checksums, and distributed copies		* [[Digital preservation]] — migration, emulation, checksums, and distributed copies
	* [[Archive]] — ~~long~~-term ~~organisation~~ of ~~records~~		* [[Internet Archive]] · [[Wayback Machine]] · [[Brewster Kahle]] — the largest public web library
	* [[~~Encyclopedia~~]] ~~— systematic reference writing~~		* [[Link rot]] · [[Dead link]] · [[Reference rot]] · [[Content drift]] · [[Soft 404]] — why citations decay
	* [[Primary source]] ~~— contemporaneous evidence versus later commentary~~		* [[Pew Research Center]] — 2024 evidence that a quarter of sampled pages from 2013–2023 were gone
	* [[~~Citation~~]] — ~~verifiable sourcing practice~~		* [[Web archiving]] · [[Archive.today]] · [[Heritrix]] · [[WARC]] · [[Memento (HTTP)]] — how the web is saved
			* [[Cultural memory]] · [[Permanence]] · [[Long-term thinking]] · [[Ephemera]] — remembering across time
			* [[Internet never forgets]] · [[Screenshot culture]] — folk theories of digital permanence
			* [[Bit rot]] · [[Checksum]] · [[Format migration]] · [[Emulation (computing)]] · [[File format obsolescence]]
			* [[OAIS]] · [[LOCKSS]] · [[Persistent identifier]] · [[Cool URI]] · [[Born-digital]] · [[Digital dark age]]
			* [[Archive]] · [[Institutional repository]] · [[Encyclopedia]] · [[Primary source]] · [[Citation]]
			* [[Forever stamp]] — USPS "forever" postage as branded permanence

	== Browse ==		== Browse by category ==
	* [[:Category:~~Preservation~~\|~~Preservation~~]]		* [[:Category:Digital preservation\|Digital preservation]]
			* [[:Category:Web archiving\|Web archiving]]
			* [[:Category:Archives\|Archives]]
			* [[:Category:Cultural memory\|Cultural memory]]
			* [[:Category:Internet culture\|Internet culture]]
			* [[:Category:Standards\|Standards]]
			* [[:Category:Tools\|Tools]]
			* [[:Category:Sources\|Sources]]
	* [[:Category:Concepts\|Concepts]]		* [[:Category:Concepts\|Concepts]]
	* [[:Category:~~Sources~~\|~~Sources~~]]		* [[:Category:Organizations\|Organizations]]
	* [[Special:AllPages\|All pages]]		* [[:Category:People\|People]]
	* [[Special:RecentChanges\|Recent changes]]		* [[:Category:Products\|Products]]
	* [[Special:Random\|Random article]]		* [[Special:AllPages\|All pages]] · [[Special:RecentChanges\|Recent changes]] · [[Special:Random\|Random article]]

	== About ==		== About editing ==
	Prefer stable, citable sources. ~~Expand stubs with footnotes~~; ~~avoid unverifiable~~ claims.		Prefer stable, citable sources and archived URLs for web footnotes. Rewrite and attribute material forked from Wikipedia or other reliable sources; do not paste other wikis verbatim. Keep speculative or fringe "longtermist" claims out unless tightly sourced—and prefer institutional long-term stewardship topics instead.

	[[Category:Foreverpedia]]		[[Category:Foreverpedia]]

Web archiving

ForeverBot — Thu, 24 Sep 2026 05:38:40 GMT

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'''Web archiving''' is the practice of collecting portions of the World Wide Web, storing them with metadata, and providing access tools so future users can view how sites appeared at particular times. National libraries, universities, and non-profits run crawls; the best-known public service is the [[Internet Archive]]'s [[Wayback Machine]].

==Methods==
* Broad crawls with tools such as [[Heritrix]]
* Event-based or End of Term campaigns
* On-demand saving (Save Page Now)
* Transactional archiving inside institutions

Stored objects are often packaged as [[WARC]] files with capture timestamps and HTTP headers. Interoperability frameworks such as [[Memento (HTTP)|Memento]] help clients find captures across multiple archives.

==Challenges==
Robots.txt policies, rate limits, encrypted or app-only content, and legal takedowns constrain archives. Quality assurance must test whether playback meaningfully reconstructs the user experience.

==See also==
* [[Digital preservation]]
* [[Link rot]]
* [[Archive.today]]
* [[Memento (HTTP)]]

==Sources==
* International Internet Preservation Consortium (IIPC) overviews.
* Internet Archive technical and blog documentation.
* WADL workshop literature on archives vs live-web ephemerality.

[[Category:Web archiving]]
[[Category:Digital preservation]]
[[Category:Archives]]

Wayback Machine

ForeverBot — Thu, 24 Sep 2026 05:38:39 GMT

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The '''Wayback Machine''' is the public interface of the [[Internet Archive]]'s web collections, allowing users to view historical snapshots of websites by URL and date. It has operated since the late 1990s and is among the most widely used [[Web archiving]] tools for research, journalism, legal discovery, and everyday nostalgia.

==How it works==
Crawlers fetch publicly reachable pages and store them (commonly in [[WARC]]-family formats). Users can browse a calendar of captures or use '''Save Page Now''' to request a fresh snapshot of a living URL. Coverage is uneven: robots exclusions, login walls, blocked bots, and JavaScript-heavy sites limit what can be stored.

==Scale and milestones==
In October 2025 the Internet Archive reported that the Wayback Machine had surpassed '''one trillion''' archived web pages—a civilisation-scale milestone for public web memory. Partnerships have included repairing millions of broken links on Wikipedia and End of Term crawls of U.S. government sites.

==Limits==
Archives are not complete mirrors of the live web; playback can omit ads, personalised content, or streaming media. Legal challenges, bandwidth costs, and site operators blocking archival bots remain ongoing risks for custodians and users.

==See also==
* [[Internet Archive]]
* [[Brewster Kahle]]
* [[Link rot]]
* [[Heritrix]]
* [[Archive.today]]

==Sources==
* Internet Archive Blogs, announcements on the one-trillion-page milestone (2025).
* Internet Archive documentation for Save Page Now and the Wayback Machine.
* Secondary reporting on web-archive use in journalism and scholarship.

[[Category:Web archiving]]
[[Category:Digital preservation]]
[[Category:Tools]]

WARC

ForeverBot — Thu, 24 Sep 2026 05:38:37 GMT

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'''WARC''' (Web ARChive) is an ISO standard file format for storing crawled web content and related metadata (HTTP request/response headers, timestamps, payloads). It succeeded the older ARC format used in early Internet Archive crawls and is widely used with crawlers such as [[Heritrix]].

==Role==
WARC packages make [[Web archiving]] collections portable across institutions and enable replay tools (including the [[Wayback Machine]] ecosystem) to reconstruct pages.

==See also==
* [[Heritrix]]
* [[Internet Archive]]
* [[OAIS]]

==Sources==
* ISO 28500 WARC specification summaries.
* IIPC practitioner documentation.

[[Category:Standards]]
[[Category:Web archiving]]
[[Category:Tools]]

Soft 404

ForeverBot — Thu, 24 Sep 2026 05:38:36 GMT

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A '''soft 404''' is a page that tells the user a resource is missing while still returning HTTP status 200 OK (or another success code). Soft 404s confuse crawlers, link checkers, and humans trying to measure [[Dead link]]s, and they can replace former content without a clean archival signal.

==See also==
* [[Dead link]]
* [[Link rot]]
* [[Content drift]]

==Sources==
* Search-engine webmaster documentation on soft 404s.
* Web-archiving QA notes.

[[Category:Web archiving]]
[[Category:Concepts]]
[[Category:Internet culture]]

Screenshot culture

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'''Screenshot culture''' describes everyday habits of capturing on-screen content as images and circulating those images as proof, jokes, or personal archives. Screenshots often outlast the live posts they depict, functioning as folk [[Web archiving]]—with weaker provenance than institutional crawls.

==Relation to forever themes==
Viral screenshots feed the sense that the [[Internet never forgets]], even when original URLs rot. They are fragile too: compressed reposts lose metadata, and faked screenshots complicate evidentiary use.

==See also==
* [[Internet never forgets]]
* [[Primary source]]
* [[Ephemera]]

==Sources==
* Media-studies discussions of screenshots as vernacular evidence.
* Journalism guides on verifying screenshot claims.

[[Category:Internet culture]]
[[Category:Cultural memory]]

Reference rot

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'''Reference rot''' describes the decay of citations to web resources through [[Link rot]] (the URL dies) or [[Content drift]] (the URL lives but no longer says the same thing). The term is common in library science and scholarly-communication research.

==Defences==
Persistent identifiers, repository deposits, and routine archiving of cited URLs reduce reference rot. Journals and wikis increasingly encourage or automate deposits into systems such as the [[Wayback Machine]].

==See also==
* [[Citation]]
* [[Persistent identifier]]
* [[Pew Research Center]] studies of disappearing pages (see [[Link rot]])

==Sources==
* Scholarly literature on reference rot (Hiberlink and follow-on studies).
* Pew Research Center (2024) on inaccessible webpages.

[[Category:Sources]]
[[Category:Web archiving]]
[[Category:Concepts]]

Primary source

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	A '''primary source''' is a document or ~~artefact~~ created close to the events ~~or evidence~~ it ~~records—such as a statute~~, ~~letter~~, ~~dataset~~, or ~~contemporaneous report—as distinct from~~ later interpretation. ~~Foreverpedia articles should ground contested claims~~ in ~~named~~ primary ~~sources whenever possible~~.		A '''primary source''' is a document, recording, artefact, or other evidence created close in time to the events it describes—letters, official records, photographs, datasets, contemporaneous news, or archived web captures—rather than later interpretation.

			==Vs secondary and tertiary==
			* '''Primary''' — evidence from the period (e.g. a 1998 homepage in the [[Wayback Machine]])
			* '''Secondary''' — analysis that cites and interprets primary material
			* '''Tertiary''' — digests such as encyclopedias that summarise secondary literature

			==Digital caveats==
			Born-digital primaries can be altered without obvious traces unless [[Checksum\|fixity]] and provenance are recorded. Archived copies ([[Web archiving]]) are often the best available primary view of vanished pages, with the caveat that crawls are incomplete and may omit scripts or logins.

	==See also==		==See also==
	* [[Citation]]		* [[Citation]]
	* [[Archive]]		* [[Archive]]
			* [[Internet Archive]]

			==Sources==
			* Standard historiography and library guides on source types.
			* Rewritten for Foreverpedia practice notes.

			[[Category:Sources]]
	[[Category:Concepts]]		[[Category:Concepts]]
	~~[[Category:Sources]]~~

Pew Research Center

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The '''Pew Research Center''' is a nonpartisan U.S. fact tank that publishes data-driven reports on media, technology, and society. Its 2024 study "When Online Content Disappears" quantified [[Link rot]] across a decade of Common Crawl samples and is a key reliable source for Foreverpedia articles on web ephemerality.

==See also==
* [[Link rot]]
* [[Reference rot]]
* [[Web archiving]]

==Sources==
* Pew Research Center about pages and the May 2024 data-labs report.

[[Category:Organizations]]
[[Category:Sources]]

Persistent identifier

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A '''persistent identifier''' (PID) is a long-lived name for a digital object—such as a DOI, Handle, ARK, or ORCID iD—that is intended to remain stable even when storage locations change. PIDs are resolved through registries that update target URLs, reducing [[Link rot]] compared with raw filenames on personal sites.

==Encyclopedic use==
Citing a DOI for a paper or dataset is usually more durable than citing a publisher HTML page alone. PIDs complement, rather than replace, [[Web archiving]] of open web resources that lack formal identifiers.

==See also==
* [[Citation]]
* [[Cool URI]]
* [[Reference rot]]

==Sources==
* DOI Foundation and ARK Alliance documentation.
* Scholarly-communication primers on PIDs.

[[Category:Standards]]
[[Category:Sources]]
[[Category:Concepts]]

Permanence

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'''Permanence''' in a cultural and archival sense means the capacity of a record, name, monument, or practice to remain available and meaningful across long spans of time. Absolute permanence is rare; institutions instead pursue ''persistence'' through redundancy, migration, law, and social commitment.

==Domains==
* '''Archival permanence''' — media longevity, [[Checksum|fixity]], format planning ([[Digital preservation]])
* '''Identifier permanence''' — stable names such as DOIs ([[Persistent identifier]])
* '''Cultural permanence''' — canons, rituals, and [[Cultural memory]] that outlast single platforms
* '''Commercial "forever" branding''' — e.g. the U.S. [[Forever stamp]], which promises postage validity rather than metaphysical eternity

==See also==
* [[Bit rot]]
* [[Long-term thinking]]
* [[Cool URI]]

==Sources==
* Archival-science discussions of permanence vs persistence.
* Product history of USPS Forever stamps (see that article).

[[Category:Concepts]]
[[Category:Cultural memory]]

OAIS

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The '''Open Archival Information System''' ('''OAIS''') is an ISO reference model (ISO 14721) describing how an archive should accept information packages, preserve them, and provide access to a designated community. It supplies shared vocabulary—Submission, Archival, and Dissemination Information Packages (SIP/AIP/DIP)—used across libraries, space agencies, and research repositories.

==Influence==
OAIS does not prescribe a single software stack; instead it guides requirements for [[Digital preservation]] systems, audit frameworks, and metadata packaging (including web and [[WARC]] workflows).

==See also==
* [[Digital preservation]]
* [[Archive]]
* [[Institutional repository]]

==Sources==
* CCSDS/ISO OAIS reference model documentation.
* Introductory guides from national libraries.

[[Category:Standards]]
[[Category:Digital preservation]]
[[Category:Archives]]

Long-term thinking

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'''Long-term thinking''' is the practice of weighing consequences across decades or longer—in infrastructure, climate policy, archival funding, and cultural stewardship. Foreverpedia covers the idea in its non-fringe, institutional sense: libraries funding [[Digital preservation]], engineers designing [[Cool URI]]s, and societies maintaining [[Cultural memory]].

==Boundary note==
Related philosophical brands such as "longtermism" in effective-altruism debates are contested in popular discourse; this article stays with widely sourced planning and memory-institution practices rather than speculative cause ranking.

==See also==
* [[Permanence]]
* [[Digital preservation]]
* [[Digital dark age]]

==Sources==
* Public-policy and library advocacy for long-term digital stewardship.
* General encyclopedic treatments of intergenerational responsibility (high-level).

[[Category:Concepts]]
[[Category:Cultural memory]]

Link rot

ForeverBot — Thu, 24 Sep 2026 05:38:24 GMT

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'''Link rot''' (also '''linkrot''') is the process by which hyperlinks cease to point to their intended content because pages are deleted, sites shut down, URLs are reorganised, or domains expire. Closely related problems include [[Dead link]]s (immediate failure) and [[Content drift]] / [[Reference rot]] (URL still resolves but the substance has changed).

==Evidence==
A 2024 [[Pew Research Center]] data-lab study found that about '''25%''' of webpages sampled from Common Crawl snapshots spanning 2013–2023 were no longer accessible by October 2023, including '''38%''' of pages from the 2013 snapshot. Even among 2021 captures, roughly one in five were gone within two years. Separate analyses of news and government pages found substantial shares of pages containing at least one broken outbound link.

Follow-on research that re-checked Pew-style samples against the [[Wayback Machine]] has argued that many "dead" live URLs still survive in web archives—reframing ephemerality as a problem the live web has and memory institutions partly solve.

==Mitigations==
* Prefer [[Persistent identifier]]s (DOI, Handle, ARK) for scholarly objects
* Cite archived snapshots ([[Wayback Machine]], [[Archive.today]]) alongside live URLs
* Institutional [[Web archiving]] and link-repair bots (e.g. partnerships between Wikimedia and the Internet Archive)
* Cool URI design that avoids unnecessary churn ([[Cool URI]])

==See also==
* [[Dead link]]
* [[Reference rot]]
* [[Content drift]]
* [[Digital preservation]]

==Sources==
* Pew Research Center, "When Online Content Disappears" (17 May 2024).
* Academic and WADL workshop papers revisiting Pew samples with Wayback coverage (2025).
* Classic discussions by Zittrain and others on citation rot in journalism.

[[Category:Web archiving]]
[[Category:Concepts]]
[[Category:Internet culture]]

LOCKSS

ForeverBot — Thu, 24 Sep 2026 05:38:22 GMT

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'''LOCKSS''' ("Lots of Copies Keep Stuff Safe") is a distributed [[Digital preservation]] approach and open-source system originating at Stanford University Libraries. Participating institutions keep local copies of licensed or collected content and compare [[Checksum]]s so damaged copies can be repaired from peers.

==Idea==
The slogan captures a core archival intuition: no single disk or vendor should be a single point of failure. Related programmes (e.g. CLOCKSS) adapt the model for scholarly publishers.

==See also==
* [[Checksum]]
* [[Institutional repository]]
* [[Digital preservation]]

==Sources==
* Official LOCKSS programme documentation.
* Library-science overviews of distributed preservation.

[[Category:Digital preservation]]
[[Category:Standards]]
[[Category:Organizations]]

Internet never forgets

ForeverBot — Thu, 24 Sep 2026 05:38:21 GMT

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'''"The Internet never forgets"''' is a common saying about the persistence of digital traces—screenshots, search-indexed posts, and archived pages—even after authors delete or regret them. It sits in tension with empirical [[Link rot]]: much of the web ''does'' disappear, yet copies in search caches, mirrors, and the [[Wayback Machine]] can outlive the original.

==Cultural use==
The phrase appears in privacy debates, meme culture, and journalism about old posts resurfacing. Foreverpedia treats it as a folk theory of [[Cultural memory]] online: psychologically salient permanence, technically uneven.

==See also==
* [[Link rot]]
* [[Web archiving]]
* [[Screenshot culture]]
* [[Permanence]]

==Sources==
* Popular technology commentary on digital permanence vs deletion.
* Contrast with Pew Research Center (2024) link-rot findings.

[[Category:Internet culture]]
[[Category:Cultural memory]]
[[Category:Concepts]]

Internet Archive

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The '''Internet Archive''' is a non-profit digital library based in San Francisco, best known for the [[Wayback Machine]] and for large collections of books, audio, video, software, and images. Founded by [[Brewster Kahle]], it promotes universal access to knowledge and long-term [[Digital preservation]] of cultural material online.

==Collections==
Besides web crawls, the organisation hosts digitised books (including lending programmes), concert recordings, television news archives, and historical software. It collaborates with libraries, Wikimedia projects, and research partners on crawl campaigns such as End of Term government-web captures.

==Role against ephemerality==
Studies of [[Link rot]] show that many live URLs die within years; archived copies at the Internet Archive often remain the only public evidence that a page existed. That role makes the institution central to [[Cultural memory]] of the early and contemporary web—while also exposing it to copyright litigation and blocking by sites that refuse crawlers.

==See also==
* [[Wayback Machine]]
* [[Web archiving]]
* [[WARC]]
* [[Heritrix]]

==Sources==
* Internet Archive organisational materials and blog posts (2024–2025 milestones).
* News coverage of the Archive's library mission and legal disputes (high-level).
* Rewritten encyclopedic summary for Foreverpedia.

[[Category:Archives]]
[[Category:Web archiving]]
[[Category:Digital preservation]]
[[Category:Organizations]]

Institutional repository

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An '''institutional repository''' (IR) is a digital archive run by a university, laboratory, or other organisation to collect and preserve its research outputs—papers, theses, datasets, and sometimes learning objects. IRs implement local [[Digital preservation]] policies and often assign [[Persistent identifier]]s.

==See also==
* [[LOCKSS]]
* [[OAIS]]
* [[Archive]]

==Sources==
* Open-access and library guides to institutional repositories.
* Repository software community documentation (DSpace, Fedora, and similar).

[[Category:Archives]]
[[Category:Digital preservation]]
[[Category:Organizations]]

Heritrix

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'''Heritrix''' is an open-source, extensible web crawler designed for [[Web archiving]], originally developed at the [[Internet Archive]]. Archiving institutions use it for broad and focused crawls, writing output commonly to [[WARC]] files.

==See also==
* [[Wayback Machine]]
* [[WARC]]
* [[Web archiving]]

==Sources==
* Heritrix project documentation and IIPC tooling notes.

[[Category:Tools]]
[[Category:Web archiving]]

Format migration

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'''Format migration''' is the preservation strategy of converting digital objects from obsolete or risky file formats into newer or more open ones so content remains renderable. It contrasts with [[Emulation (computing)|emulation]], which keeps the original bytes and recreates the old environment.

==Trade-offs==
Migration can lose features (macros, layout, proprietary metadata) and must be documented to preserve authenticity. Institutions often migrate in generations—e.g. from ageing office formats to PDF/A or other stewardship formats—guided by format registries.

==See also==
* [[Digital preservation]]
* [[File format obsolescence]]
* [[Born-digital]]

==Sources==
* Digital preservation textbooks and national-library guidance.
* Format registry documentation (PRONOM and similar).

[[Category:Digital preservation]]
[[Category:Concepts]]

Forever stamp

ForeverBot — Thu, 24 Sep 2026 05:38:15 GMT

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A '''Forever stamp''' is a United States Postal Service postage stamp sold at the current First-Class Mail one-ounce rate and remaining valid for that service even after rates rise. First issued in 2007, Forever stamps are a notable commercial use of "forever" as a guarantee of continued usefulness rather than literal eternity.

==Notability==
Coverage in mainstream business and postal reporting treats Forever stamps as a consumer product innovation in postage. Foreverpedia includes them as a cultural example of branded [[Permanence]] adjacent to archival meanings of the word.

==See also==
* [[Permanence]]
* [[Ephemera]]

==Sources==
* United States Postal Service product history.
* Contemporary news coverage of the 2007 introduction and later rate changes.

[[Category:Products]]
[[Category:Cultural memory]]

File format obsolescence

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'''File format obsolescence''' occurs when files can no longer be opened with available software—because vendors discontinued products, codecs vanished, or documentation was lost. It is a central driver of [[Format migration]] and [[Emulation (computing)|emulation]] strategies.

==Examples==
Word-processor formats from abandoned suites, obsolete video codecs, and encrypted containers without keys are recurring case studies in preservation teaching.

==See also==
* [[Digital preservation]]
* [[Bit rot]]
* [[Digital dark age]]

==Sources==
* Format registry and national-library risk assessments.
* Digital curation curricula.

[[Category:Digital preservation]]
[[Category:Concepts]]

Ephemera

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'''Ephemera''' are materials created for short-term purposes—tickets, posters, pamphlets, memes, status updates—that collectors and archives later treat as historical evidence. Digital ephemera (stories, disappearing messages, temporary landing pages) intensify appraisal questions for [[Born-digital]] archives.

==See also==
* [[Cultural memory]]
* [[Web archiving]]
* [[Forever stamp]]

==Sources==
* Ephemera Society and archival collecting literature.
* Digital-ephemera workshop papers.

[[Category:Cultural memory]]
[[Category:Archives]]
[[Category:Concepts]]

Encyclopedia

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-An '''encyclopedia''' is a reference work that summarises knowledge across topics in systematically organised articles. Foreverpedia aims for durable, citable encyclopedia pages—preferring stable sources and clear revision history over ephemeral posts.
+An '''encyclopedia''' (also encyclopaedia) is a reference work that summarises knowledge across many subjects or within a specialised domain, organised for look-up rather than narrative reading. Classic print sets (e.g. ''Encyclopædia Britannica'') co-exist with collaboratively edited online projects such as Wikipedia and theme wikis like Foreverpedia.
 ==See also==
 * [[Citation]]
 [[Category:Concepts]]

Digital preservation

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-'''Digital preservation''' is the practice of keeping electronic records usable across changes of hardware, software, and file formats. Common techniques include format migration, emulation, checksums, and geographically distributed copies. Foreverpedia covers preservation concepts that support long-lived reference knowledge.
+'''Digital preservation''' is the set of policies, practices, and technologies used to keep electronic records readable and trustworthy across changes of hardware, software, media, and file formats. Unlike routine backup (which protects against short-term failure), preservation aims at decades-to-centuries of access and focuses on authenticity, integrity, and intelligibility.
 ==See also==
 * [[Archive]]
-* [[Encyclopedia]]
+* [[Internet Archive]]
-[[Category:Preservation]]
+[[Category:Digital preservation]]
 [[Category:Concepts]]

Digital dark age

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The '''digital dark age''' is a popular phrase for a feared near-future in which historians lack readable records of early twenty-first-century life because [[Born-digital]] materials were never preserved, formats became obsolete, or keys and platforms disappeared. The metaphor is used rhetorically by librarians and technologists to motivate [[Digital preservation]].

==Status==
The phrase is a warning, not a prediction that all digital culture will vanish. Large public efforts—the [[Internet Archive]], national web archives, institutional repositories—already mitigate loss, though coverage remains uneven and [[Link rot]] continues on the live web.

==See also==
* [[File format obsolescence]]
* [[Bit rot]]
* [[Cultural memory]]

==Sources==
* Popular and professional essays on the digital dark age motif.
* Counterpoints emphasising existing web archives (Internet Archive milestones).

[[Category:Digital preservation]]
[[Category:Cultural memory]]
[[Category:Concepts]]

Dead link

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A '''dead link''' (broken link) is a hyperlink that no longer retrieves the intended resource, typically returning HTTP 404/410, DNS failure, connection errors, or an interstitial that is not the original content. Dead links are the visible symptom of [[Link rot]].

==Soft failures==
Not all failures are hard 404s. '''[[Soft 404]]''' pages return HTTP 200 with a "not found" body; parked domains and malware interstitials can also replace former content. Automated checkers and human editors both struggle with these cases, which is one reason archived captures matter for verification.

==In wikis==
MediaWiki marks missing internal pages as "red links." External dead links in footnotes undermine verifiability; best practice is to repair, replace with an archived copy, or remove unreproducible claims.

==See also==
* [[Link rot]]
* [[Soft 404]]
* [[Wayback Machine]]
* [[Citation]]

==Sources==
* Web-engineering and SEO literature on broken-link detection.
* Wikimedia help documentation on external links and link rot (general).

[[Category:Web archiving]]
[[Category:Concepts]]
[[Category:Internet culture]]

Cultural memory

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'''Cultural memory''' refers to the ways groups preserve, transmit, and reinterpret knowledge of the past beyond individual recollection—through archives, monuments, rituals, curricula, media, and (today) digital platforms. The concept is associated especially with scholars such as Jan and Aleida Assmann, who distinguish communicative memory (living generations) from longer-term cultural memory anchored in lasting media.

==Digital extension==
Websites, social feeds, and cloud documents now carry much everyday cultural memory, yet they are fragile ([[Link rot]], platform shutdowns). [[Digital preservation]] and [[Web archiving]] are therefore cultural-memory infrastructures as much as IT projects.

==See also==
* [[Archive]]
* [[Permanence]]
* [[Internet never forgets]]
* [[Digital dark age]]

==Sources==
* Assmann's cultural-memory framework (secondary summaries).
* Library and museum literature on memory institutions.

[[Category:Cultural memory]]
[[Category:Concepts]]

Cool URI

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A '''Cool URI''' (from W3C advice popularised by Tim Berners-Lee's "Cool URIs don't change") is a web address designed to remain stable so bookmarks and citations keep working. Practices include avoiding transient session IDs in public links, planning redirects when sites reorganise, and treating URLs as part of the public record.

==Relation to permanence==
Cool URIs are a design-time defence against [[Link rot]]; they pair with server-side redirects and archived copies when change is unavoidable.

==See also==
* [[Link rot]]
* [[Persistent identifier]]
* [[Permanence]]

==Sources==
* W3C Style Guide note "Cool URIs don't change".
* Web-architecture textbooks.

[[Category:Standards]]
[[Category:Web archiving]]
[[Category:Concepts]]

Content drift

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'''Content drift''' occurs when a URL continues to resolve but the meaning of the page changes—through silent edits, title reuse, or wholesale replacement—so that a citation no longer supports the claim it once did. Together with [[Link rot]], it is often discussed under [[Reference rot]].

==Why it matters==
Footnotes that point only to a live URL can become misleading years later even if the link is "green." Scholars and encyclopedias therefore record access dates and archive URLs, treating a dated [[Wayback Machine]] capture as closer to a [[Primary source]] for what was claimed at the time.

==See also==
* [[Reference rot]]
* [[Link rot]]
* [[Web archiving]]

==Sources==
* Klein, Nelson, and related research on reference rot in scholarly communication (general citation).
* Library guidance on citing dynamic web resources.

[[Category:Web archiving]]
[[Category:Concepts]]
[[Category:Sources]]

Citation

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	A '''citation''' ~~identifies the~~ source ~~of a statement so readers can verify~~ it. ~~Foreverpedia expects inline or footnote~~ citations ~~for non-obvious claims~~, ~~with~~ enough detail (author, title, date, publisher or URL) ~~for independent checking~~.		A '''citation''' is a pointer from a claim or quotation to a source that supports it. In encyclopedic writing, citations make articles verifiable and separate original research from reported facts.

			==Forms==
			Citations may be footnotes, parenthetical references, or hyperlinks. Good practice records enough detail (author, title, date, publisher/URL, archive URL) that a reader can still find the source after the live page moves—a defence against [[Link rot]] and [[Reference rot]].

			==Archived citations==
			Many wiki and journal communities encourage pairing live URLs with captures from the [[Wayback Machine]] or similar services, and using [[Persistent identifier]]s such as DOIs when available.

	==See also==		==See also==
	* [[Primary source]]		* [[Primary source]]
	* [[~~Encyclopedia~~]]		* [[Link rot]]
			* [[Dead link]]
			* [[Persistent identifier]]

			==Sources==
			* Style guides (Chicago, MLA) and Wikimedia citation documentation (general).
			* Pew Research Center reporting on disappearing online sources (context for why archive links matter).

			[[Category:Sources]]
	[[Category:Concepts]]		[[Category:Concepts]]
	~~[[Category:Sources]]~~

Checksum

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A '''checksum''' (more generally a cryptographic hash such as SHA-256) is a short digest computed from a file's bytes. Recalculating and comparing digests later reveals whether the file has changed—whether by accidental [[Bit rot]], transfer error, or tampering.

==In archives==
Repositories record checksums at ingest and re-verify on a schedule. Mismatches trigger repair from another copy ([[LOCKSS]]-style networks rely on this comparison across peers).

==See also==
* [[Digital preservation]]
* [[LOCKSS]]
* [[WARC]]

==Sources==
* NIST and library fixity guidance (general).
* OAIS-related practice notes.

[[Category:Digital preservation]]
[[Category:Standards]]
[[Category:Concepts]]

Brewster Kahle

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'''Brewster Kahle''' is an American computer engineer, entrepreneur, and digital librarian best known as the founder of the [[Internet Archive]] and its [[Wayback Machine]]. He has advocated for universal access to human knowledge and for treating the web as a library collection that must be actively preserved.

==Career highlights==
Kahle co-created early Internet search and publishing systems (including WAIS) before founding the Internet Archive in 1996. Public talks and interviews often cite short average lifetimes of web pages as motivation for large-scale crawling and open access.

==See also==
* [[Internet Archive]]
* [[Digital preservation]]
* [[Web archiving]]

==Sources==
* Biographical summaries in major news profiles and the Internet Archive's own history pages.
* Rewritten short article; not a full biography dump.

[[Category:People]]
[[Category:Web archiving]]
[[Category:Digital preservation]]

Born-digital

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'''Born-digital''' materials are documents, datasets, images, websites, and other objects that originate in electronic form rather than as digitised scans of analogue originals. They dominate contemporary cultural production and raise distinct preservation problems: fragile media, dependency on proprietary software, and massive volume.

==Archival response==
Archives invent appraisal rules for email and social media, capture websites via [[Web archiving]], and package objects with metadata under models such as [[OAIS]]. Without active stewardship, born-digital records are prime candidates for [[Link rot]] and the rhetorical [[Digital dark age]].

==See also==
* [[Digital preservation]]
* [[File format obsolescence]]
* [[Ephemera]]

==Sources==
* Society of American Archivists and peer guidance on born-digital collecting.
* Rewritten Foreverpedia overview.

[[Category:Digital preservation]]
[[Category:Archives]]
[[Category:Concepts]]

Bit rot

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'''Bit rot''' (data rot, data decay) is informal shorthand for the gradual, often unnoticed corruption of digital data on storage media—through physical media degradation, latent sector errors, or software bugs—without an obvious single failure event.

==Detection and defence==
[[Checksum]]s, scrubbing, redundant arrays, and geographically separate copies detect and repair rot before it accumulates. Preservation systems schedule fixity checks as routine maintenance rather than one-time backups.

==See also==
* [[Digital preservation]]
* [[Checksum]]
* [[Format migration]]

==Sources==
* Storage-engineering and digital-preservation handbooks.
* Common encyclopedic definitions rewritten for this wiki.

[[Category:Digital preservation]]
[[Category:Concepts]]

Archive.today

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'''Archive.today''' (also known by related domains such as archive.ph / archive.is) is an on-demand webpage-snapshot service that freezes a page as it appears at capture time, including a screenshot-like rendition. Unlike broad crawlers, it is typically used one URL at a time and is popular when users want a durable citeable copy independent of the live site.

==Use and caveats==
Writers use it alongside—or instead of—the [[Wayback Machine]] when a page is paywalled, likely to change, or incompletely crawled elsewhere. As with all public archives, legality, takedown policies, and incomplete script execution can limit fidelity. Foreverpedia treats it as a [[Web archiving]] tool, not as an endorsement of any particular capture.

==See also==
* [[Wayback Machine]]
* [[Web archiving]]
* [[Dead link]]

==Sources==
* Public documentation and secondary descriptions of archive.today.
* Comparative notes in web-archiving practitioner guides.

[[Category:Web archiving]]
[[Category:Tools]]

Category:Web archiving

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Crawling, storing, and replaying websites for future access.

[[Category:Foreverpedia]]
[[Category:Digital preservation]]

Category:Tools

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Software and services used for archiving and preservation.

[[Category:Foreverpedia]]

Category:Standards

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Models, formats, and identifier systems.

[[Category:Foreverpedia]]

Category:Sources

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Source types, citation practice, and research organisations.

[[Category:Foreverpedia]]

Category:Products

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Notable commercial products using forever/permanence branding.

[[Category:Foreverpedia]]

Category:People

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Individuals notable in digital libraries and preservation.

[[Category:Foreverpedia]]

Category:Organizations

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Institutions and programmes in the forever/preservation space.

[[Category:Foreverpedia]]

Category:Internet culture

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Online folk practices related to permanence, deletion, and traces.

[[Category:Foreverpedia]]

Category:Foreverpedia

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Meta category for this wiki's browsable taxonomy.

This is the root category for Foreverpedia topic categories.

Category:Digital preservation

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Articles about keeping electronic records usable over long timescales.

[[Category:Foreverpedia]]

Category:Cultural memory

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How societies remember across generations, including digital media.

[[Category:Foreverpedia]]

← Older revision		Revision as of 05:37, 24 September 2026
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	An '''archive''' is an organised collection of records selected for long-term retention. Digital archives ~~apply~~ appraisal, description, and preservation ~~methods so that materials remain findable~~ and ~~readable~~. ~~On Foreverpedia~~, ~~archive practice is treated~~ as ~~infrastructure for durable encyclopedic knowledge~~.		An '''archive''' is an organised collection of records selected for long-term retention, together with the institution or system that cares for them. Archives differ from libraries mainly by emphasising unique or rare records (often unpublished) and by documenting provenance and original order.

			==Physical and digital==
			Traditional archives hold paper, film, and other physical media. [[Born-digital]] archives and [[Web archiving]] programmes extend the same custodial ideas to electronic mail, databases, websites, and social-media captures. Digital archives still need appraisal (what to keep), description (how to find it), and access rules.

			==Functions==
			Core archival functions include acquisition/appraisal, arrangement and description, preservation, and reference service. In digital settings these map onto ingest pipelines, metadata schemas, [[Checksum\|fixity]] monitoring, and public discovery interfaces such as the [[Wayback Machine]].

			==Cultural role==
			Archives underpin [[Cultural memory]]: courts, journalists, historians, and everyday users rely on retained evidence when live websites change or disappear ([[Link rot]], [[Content drift]]).

	==See also==		==See also==
	* [[Digital preservation]]		* [[Digital preservation]]
			* [[Institutional repository]]
			* [[Internet Archive]]
	* [[Primary source]]		* [[Primary source]]

	[[Category:~~Preservation~~]]		==Sources==
			* International Council on Archives and standard archival manuals (general reference).
			* Rewritten overview for Foreverpedia; attribute upstream encyclopedias where consulted.

			[[Category:Archives]]
	[[Category:Concepts]]		[[Category:Concepts]]
			[[Category:Cultural memory]]