Writings

Paul Otlet's treatise on organising documents and knowledge, setting out the field he called documentation.

Essay in The Atlantic Monthly imagining machines that extend human memory, including the memex, a desk for storing records and linking them by association.

John McCarthy's 1959 paper proposing the 'advice taker', a program that would decide what to do by deducing it from facts and rules stated in formal logic; the founding statement of logic-based knowledge representation.

Douglas Engelbart's 1962 SRI report setting out a research programme to use computers to extend human problem-solving, which led to NLS.

Paul Baran's 1964 RAND memorandum comparing centralized, decentralized and distributed networks, and showing that a distributed network survives attacks on its nodes and links far better than a centralized one.

Ted Nelson's paper at the 1965 ACM national conference, which introduced the word 'hypertext' in print.

Collection of early AI research on meaning and language, edited by Marvin Minsky.

M. Ross Quillian's account of a memory model that stores word meanings as a network of linked concepts.

1970 paper by Waldo Tobler in Economic Geography, a computer animation of Detroit's growth, in which he states the first law of geography.

E.F. Codd's 1970 paper in Communications of the ACM proposing that data be organized as relations (tables), independently of how it is stored.

Ted Nelson's self-published two-sided book explaining computers to the public and setting out his ideas for hypertext and Xanadu.

Marvin Minsky's MIT AI Lab memo introducing frames: structures of slots with default values for stereotyped situations.

William Woods's 1975 critique showing that the links in semantic networks had no agreed meaning, mixing up, for example, a class with its members and a definition with an assertion; it set the agenda for giving networks a formal semantics.

Peter Chen's paper in the first issue of ACM Transactions on Database Systems, proposing to model data as entities and the relationships between them.

Raymond Reiter's 1978 paper formalizing the closed-world assumption: a database may treat any fact it cannot show to be true as false.

1978 paper by Donald Kessler and Burton Cour-Palais in the Journal of Geophysical Research predicting that collisions in low Earth orbit would come within decades and that debris would overtake meteoroids as the main hazard by about 2000.

Brachman and Schmolze's 1985 account of KL-ONE, a frame-based system with defined concepts and an automatic classifier that places each concept in a subsumption hierarchy; KL-ONE was the first knowledge representation system based on what became description logics.

Levesque and Brachman's 1987 paper showing that reasoning gets dramatically harder as a representation language gets more expressive, and that this trade-off underlies the differences between existing representation formalisms.

Tim Berners-Lee's proposal to CERN management for a linked information system. It became the World Wide Web.

Book by Doug Lenat and R.V. Guha on the representation and inference methods of the Cyc project.

Tom Gruber's paper on sharing ontologies between knowledge systems. It contains the definition of an ontology as 'an explicit specification of a conceptualization'.

1997 submission to the W3C by R.V. Guha and Tim Bray describing MCF in XML; a direct precursor to RDF.

Tim Berners-Lee's 1998 note arguing that a URI, once published, should keep working indefinitely, and that breaking links is a choice made by poor design rather than an accident of technology.

Brin and Page's 1998 paper describing Google and PageRank, which ranks pages by the links pointing to them; it showed that the Web's link structure could serve as a signal of authority, with no metadata needed from publishers.

Tim Berners-Lee's 1998 Design Issues note giving a high-level plan for the architecture of the Semantic Web.

1999 book by Lawrence Lessig on how the Internet is regulated, arguing that software architecture ('code') constrains behaviour much as law, markets and norms do.

Tim Berners-Lee's account of how he created the World Wide Web, ending with his plans for a Semantic Web.

Roy Fielding's 2000 doctoral dissertation at UC Irvine, which defined REST, the architectural style of the Web: resources named by URIs, manipulated through representations over a uniform interface. Most Web APIs since claim descent from it.

Step-by-step guide by Natasha Noy and Deborah McGuinness to building an ontology, with examples in Protégé.

WWW10 paper of May 2001 by José Kahan, Marja-Riitta Koivunen, Eric Prud'hommeaux and Ralph Swick describing Annotea.

Scientific American article by Berners-Lee, Hendler and Lassila describing software agents that act on machine-readable meaning published on the Web.

Cory Doctorow's essay arguing that reliable metadata is unattainable because people lie, are lazy and disagree.

Clay Shirky's essay arguing that the Semantic Web's reliance on syllogistic logic fails on real-world, context-dependent data.

Design history of OWL by Horrocks, Patel-Schneider and van Harmelen, tracing it from description logics and RDF.

W3C policy adopted on 5 February 2004 so that its Recommendations can be implemented on a royalty-free basis: participants commit to license patents essential to a specification without charge.

2004 OSDI paper by Jeffrey Dean and Sanjay Ghemawat describing how Google split computations over huge datasets across thousands of ordinary machines; it set the pattern for big data processing.

Clay Shirky's 2005 essay, from talks at O'Reilly ETech and IMCExpo, arguing that hierarchical classification is a habit of the shelf and that on the Web links and free tagging work better than expert ontologies; the best-known case for folksonomy.

WWW 2005 paper extending RDF so that a set of statements can be named by a URI and described like any resource. It shows publishers signing their graphs and consumers deciding which graphs to trust.

Roy Fielding's June 2005 message announcing the W3C TAG's answer to httpRange-14: a URI that answers with a 2xx response names an information resource, while one that answers with a 303 redirect may name anything.

2006 conference paper by Krötzsch, Vrandečić and Völkel introducing Semantic MediaWiki.

IEEE Intelligent Systems article in which Shadbolt, Hall and Berners-Lee reassessed the Semantic Web five years after the 2001 article.

Tim Berners-Lee's short Design Issues note setting out four rules for publishing data on the Web with URIs and links.

Book edited by Charlotte Hess and Elinor Ostrom applying Ostrom's research on how communities sustain shared resources to knowledge: digital libraries, open access, open-source software and the rules that keep them from being depleted or enclosed.

2007 paper by the DBpedia founders describing how they extracted Wikipedia's structured content and published it as Linked Data.

Book by Jérôme Euzenat and Pavel Shvaiko (2007; second edition 2013) on methods for finding correspondences between the terms of different ontologies, so that data described in one can be used with another.

Jim Hendler's 2007 editorial in IEEE Intelligent Systems, six years after he co-wrote the Scientific American article that promised Semantic Web agents, asking why those agents had not appeared.

WWW 2007 paper presenting YAGO, a knowledge base that attaches facts extracted from Wikipedia to WordNet's taxonomy, with high measured accuracy.

August 2007 essay by Brad Fitzpatrick and David Recordon arguing that the map of who knows whom should be an open, shared asset rather than locked inside each social network.

2007 paper by Yves Raimond, Samer Abdallah, Mark Sandler and Frédérick Giasson at ISMIR presenting the Music Ontology, a framework for editorial, cultural and acoustic information about music on the Semantic Web.

Principles written by thirty open-government advocates meeting in Sebastopol, California, on 7–8 December 2007: government data should be complete, primary, timely, accessible, machine-processable, non-discriminatory, non-proprietary and licence-free.

2008 paper describing Freebase's data model and how its contributors built it.

2008 EKAW paper by Martin Hepp presenting GoodRelations, an ontology for describing what businesses offer, at what price and on what terms.

W3C Interest Group Note (2008) giving publishers two recipes for URIs that name things rather than pages: hash URIs, and 303 redirects based on the httpRange-14 resolution.

2008 paper by Pat Hayes and Harry Halpin arguing that reference is ambiguous in any language, so Web architecture cannot make what a URI names fully unambiguous, and that a redirect alone does not settle it.

Practitioner's guide by Dean Allemang and Jim Hendler to modelling with RDFS and OWL.

2008 Communications of the ACM article by Weitzner, Abelson, Berners-Lee, Feigenbaum, Hendler and Sussman arguing that the Web should make the use of information accountable to rules, rather than rely on hiding and access control alone.

2009 book by Viktor Mayer-Schönberger arguing that digital memory has made forgetting the exception, and proposing expiration dates for stored information.

Survey by Bizer, Heath and Berners-Lee of the principles and early growth of the Web of Linked Data.

2009 ESWC paper by Georgi Kobilarov, Tom Scott, Yves Raimond and colleagues at the BBC and Freie Universität Berlin, describing how BBC Programmes and BBC Music used DBpedia and MusicBrainz identifiers to connect content across the BBC's site.

Halevy, Norvig and Pereira's 2009 essay arguing that simple models trained on very large amounts of web data beat elaborate hand-built models, and that meaning is better learned from use at scale than specified in advance.

2009 workshop paper by Oktie Hassanzadeh and Mariano Consens presenting LinkedMDB, linked open data about films and their links to other datasets.

Paper by Pérez, Arenas and Gutiérrez giving SPARQL a compositional formal semantics and proving the complexity of evaluating it; general SPARQL patterns are PSPACE-complete.

ISWC 2009 paper by Hartig, Bizer and Freytag proposing link-traversal querying: a SPARQL query is answered by following links and looking up URIs as it runs, so the data sources need not be known in advance.

2010 paper by Paul Groth, Andrew Gibson and Jan Velterop in Information Services & Use defining the nanopublication.

2010 ISWC paper showing that owl:sameAs links between Linked Data sets are often used to mean 'similar' or 'related' rather than strict identity, and proposing finer-grained alternatives.

Tim Berners-Lee's 2010 Scientific American essay defending the Web's design principles, including decentralization, and warning that large social-networking sites were walling users' information off from the rest of the Web.

Book by Tom Heath and Christian Bizer setting out the Linked Data principles and how to publish and use Linked Data.

Jonathan Rees's February 2012 call, for the W3C TAG, for proposals to change or withdraw the 2005 resolution, citing the cost of 303 redirects: extra round trips, caching, and hosts that cannot send them.

Google blog post by Amit Singhal announcing the Knowledge Graph, which brought the term into wide use.

2012 NIPS paper by Alex Krizhevsky, Ilya Sutskever and Geoffrey Hinton whose deep network, trained on GPUs, won the ImageNet image-recognition contest by a wide margin and turned machine learning toward deep learning.

Report of a W3C workshop held in Cambridge, Massachusetts in September 2013. Participants found no standard for checking RDF data against constraints, and a majority backed a working group to define one.

2013 NIPS paper introducing TransE, which represents each entity in a knowledge graph as a vector and each relation as a translation between vectors, so that missing facts can be predicted; the starting point of knowledge-graph embeddings.

2013 paper by Tomas Mikolov, Kai Chen, Greg Corrado and Jeffrey Dean introducing word2vec: vectors learned from which words occur together, in which relations such as king to queen show up as directions.

Aaron Swartz's unfinished short book on Semantic Web ideas, published after his death in 2013.

Guardian article of June 2013 by Glenn Greenwald and Ewen MacAskill, based on documents from Edward Snowden, revealing the PRISM programme.

ISWC 2013 paper that monitored hundreds of public SPARQL endpoints and found many of them often unavailable, slow, or limited in what they would answer: evidence that free public query services were hard to keep running.

Manu Sporny's January 2014 blog post, written days after JSON-LD became a W3C Recommendation, saying that better Web APIs, not the Semantic Web, motivated JSON-LD, and that keeping RDF out of sight was what made it usable.

Judgment of the EU Court of Justice of 13 May 2014 (C-131/12) holding that search engines must, on request, remove links to information about a person that is inadequate, irrelevant or no longer relevant.

Juan Benet's 2014 paper describing the design of IPFS.

2014 KDD paper by Xin Luna Dong and eight Google colleagues describing a knowledge base built by machine: facts extracted from text, tables and page structure across the Web, combined with existing knowledge bases and given probabilities of being true.

SEMANTiCS 2014 paper introducing Shape Expressions (ShEx), a structural schema language that describes the shape RDF data should have and checks data against it.

Communications of the ACM article by Vrandečić and Krötzsch introducing Wikidata's design and goals.

2014 PLoS ONE study of millions of web links in scholarly articles, finding that about one in five articles cites web resources that have since vanished or changed: link rot measured at scale.

Brewster Kahle's talk to the NetGain gathering at the Ford Foundation. He argues that the Web is fragile and lets readers be tracked and censored, that 'the way we code the Web will determine the way we live online', and calls for a peer-to-peer Web with no central host.

2015 IEEE Symposium on Security and Privacy paper by Yinzhi Cao and Junfeng Yang that named machine unlearning: removing the effect of particular training data from a learned model without retraining it from scratch.

2015 paper by Robert Rovetto in Earth Science Informatics presenting an ontological architecture for data on orbital debris and space situational awareness.

Nadia Eghbal's 2016 report for the Ford Foundation arguing that open-source software is public infrastructure, maintained by a few unpaid or underpaid people, and that nobody has taken responsibility for funding it.

Communications of the ACM article by Guha, Brickley and Macbeth on the history and design of schema.org.

2016 Journal of Web Semantics paper proposing Triple Pattern Fragments: servers answer only simple triple patterns and clients do the rest of the query, trading some speed for servers that are cheap to run and stay up.

WWW 2016 paper on moving Freebase's data into Wikidata after Google announced in December 2014 that it would close Freebase: what could be carried over, what could not, and why a company's knowledge base did not simply transfer to a community one.

Christopher Allen's essay setting out ten principles for digital identity controlled by the individual.

Semantic Web journal paper describing LOV, a curated catalogue of reusable vocabularies that records how they link to each other, their versions and who maintains them, to help publishers choose existing vocabularies instead of inventing new ones.

Olaf Hartig's 2017 paper proposing to nest RDF triples, so a statement can carry metadata such as a source or a certainty score without standard reification's bloat. It led to RDF-star and to triple terms in RDF 1.2.

2017 paper by Ashish Vaswani and seven Google colleagues introducing the transformer, a network built on attention that became the basis of large language models.

2018 paper by Julia Bullard in Knowledge Organization comparing three user-generated collections that structure their tags through human judgment, and proposing the curated folksonomy as an object of study.

2018 ESWC paper that collected about 559 million owl:sameAs statements from a 2015 crawl of Linked Data, computed which names they make equivalent, and published the result with an error score for each link.

Observer and Guardian article of March 2018 by Carole Cadwalladr and Emma Graham-Harrison reporting that a political consultancy obtained data on tens of millions of Facebook users through a quiz app; Facebook then restricted what apps could read.

2018 paper by Jacob Devlin, Ming-Wei Chang, Kenton Lee and Kristina Toutanova: a transformer pre-trained on large amounts of text that set new results on many language tasks; Google applied it to Search in 2019.

David Booth's November 2018 message to the W3C semantic-web list arguing that the whole RDF ecosystem, from SPARQL and OWL to tools, is too hard for average developers, the middle third by ability, and that education had not fixed it in fifteen years; it began the EasierRDF effort on GitHub.

Report of a W3C workshop held in Berlin in March 2019 that brought the RDF, property-graph and SQL communities together. It backed a property-graph query language developed alongside SQL (GQL) and discussed extending RDF to make statements about statements.

Ink & Switch essay setting out seven ideals for software that keeps data on users' devices while still allowing real-time collaboration.

2019 paper by Brickley, Burgess and Noy describing how Google Dataset Search finds datasets through their schema.org descriptions.

2019 Communications of the ACM article by engineers from Microsoft, Google, Facebook, eBay and IBM comparing how their companies build and run knowledge graphs, and what remains hard.

Survey by Aidan Hogan and 17 co-authors of the data models, query languages, reasoning and methods behind knowledge graphs.

Five principles for a decentralized web, written by the DWeb community with dozens of contributors from technology, organizing, academia, policy and the arts: technology for human agency, distributed benefits, mutual respect, humanity and ecological awareness. First shown at the February 2021 DWeb meetup and offered as 'a starting point, not an end point'.

Survey proposing three ways to combine language models and knowledge graphs: KG-enhanced LLMs, LLM-augmented KGs, and the two working together.

Paper by Martin Kleppmann and eight Bluesky engineers explaining the design of Bluesky and AT Protocol; published at an ACM CoNEXT workshop in December 2024.

Microsoft Research paper by Darren Edge and nine co-authors introducing the GraphRAG method.

2024 paper by Liu, Semnani, Triedman, Xu, Zhao and Lam with a dataset of real questions from Wikidata's 'Request a Query' forum, where users ask others to write SPARQL for them, and a language-model agent that writes such queries the way an expert would.

Report of the W3C workshop held in London in July 2026, which reached consensus on a new W3C Working Group for ODRL 3.0: policies that are machine-actionable across sectors, with stronger formal semantics, conformance rules and a test suite, working with standards for identity, provenance, legal information and data spaces.

October 2026 paper by the W3C Strategy Team, prepared by Philippe Le Hégaret, on how the Web's standards must change as AI agents act for users: agents prefer text and structured data to HTML, JSON-LD, RDF, DCAT and ODRL become more valuable as inputs and guardrails for agents, and Verifiable Credentials and DIDs can identify agents and whom they act for.