PeopleofSuperintelligence

Researcher

Ora Lassila

Ora Lassila is a computer scientist whose work on the Resource Description Framework, the Semantic Web and knowledge graphs now reaches into language models. As a Visiting Scientist at MIT in 1996–1997, he worked with W3C to launch RDF and co-edited its Model and Syntax specification, a W3C Recommendation in 1999, and he served on the W3C Advisory Board from 1998 to 2013. In 2001, he wrote "The Semantic Web" for Scientific American with Tim Berners-Lee and James Hendler, and by 2007 he was a Research Fellow at the Nokia Research Center and the author of the Wilbur toolkit, with a doctoral dissertation from Helsinki University of Technology. By 2021, he was a Principal Graph Technologist on the Amazon Neptune team; he received the KGC Lifetime Achievement Award in 2026 and holds a January 2026 patent on "Knowledge Graph Assisted Large Language Models". Since April 2026, he is an AI expert at Accenture, where he defines knowledge engineering around ontologies and knowledge graphs and co-chairs the W3C RDF & SPARQL Working Group.

Works
81
Citations
14,428
h-index
21
Badges

Publication numbers from OpenAlex, as of 22 October 2026.

Timeline

  1. 1996–1999

    Launching RDF at MIT

    In 1996–1997, he is a Visiting Scientist at the MIT Laboratory for Computer Science, working with W3C to launch the Resource Description Framework (RDF) standard. He co-edits the RDF Model and Syntax specification, which becomes a W3C Recommendation in 1999 and the first official RDF standard.

  2. 1998–2013

    W3C Advisory Board member

    From 1998 to 2013, he serves as an elected member of the Advisory Board of the World Wide Web Consortium (W3C). He also represents Nokia on the W3C Advisory Committee in 1998–2002.

  3. 2001

    The Semantic Web article

    In May 2001, Scientific American publishes "The Semantic Web", which he writes with Tim Berners-Lee and James Hendler about a new form of Web content that is meaningful to computers. It becomes the most cited paper in the Semantic Web area.

  4. By 2007

    Wilbur toolkit at Nokia

    By 2007, he is a Research Fellow at the Nokia Research Center in Cambridge, Massachusetts, where he works on the Semantic Web, mobile devices and ubiquitous computing. He is the author of Wilbur, a Semantic Web toolkit written in Common Lisp. In 2007, he completes his doctoral dissertation at Helsinki University of Technology, Programming Semantic Web Applications: A Synthesis of Knowledge Representation and Semi-Structured Data.

  5. By 2021

    Graph technologist at Amazon Neptune

    By 2021, he is a Principal Graph Technologist in the Amazon Neptune graph database group. Previous roles include Managing Director at State Street, heading the firm's efforts to adopt ontologies and graph databases, and technology architect at Pegasystems.

  6. January 2026

    Patent on knowledge graphs and LLMs

    He holds a patent from January 2026 on "Knowledge Graph Assisted Large Language Models". The approach takes a user's SPARQL query and has an LLM construct a knowledge graph that the query can run against, which makes the knowledge the model embodies explicit and open to audit and curation.

  7. 2026

    KGC Lifetime Achievement Award

    In 2026, he receives the KGC Lifetime Achievement Award at the Knowledge Graph Conference for his work on the original Semantic Web paper.

  8. Since April 2026

    Knowledge engineering at Accenture

    In April 2026, he joins Accenture to define what Knowledge Engineering means for this new generation of AI, focusing on ontologies and knowledge graphs. He is an AI expert there, with the title Associate Director of Data Engineering and Governance, and co-chairs the W3C RDF & SPARQL Working Group, which defines the next version of the RDF standard.

Career

  1. Since 2026AccentureAssociate Director of Data Engineering and Governance
  2. Since 1998World Wide Web ConsortiumAdvisory Board member, Nokia representative on the Advisory Committee
  3. 2020–2025AmazonPrincipal Graph Technologist
  4. 1996–1997MIT CSAILVisiting Scientist
  5. NokiaResearch Fellow
  6. State StreetManaging Director
  7. PegasystemsTechnology Architect

Education

  1. 2007Aalto UniversityDoctorate

From the biography and OpenAlex affiliations (the years of papers that list the organization), so some years are approximate.

Most-cited works

  1. The Semantic Web2001 · Scientific American · 9,343 citationsWith James A. Hendler
  2. DAML-S: Semantic Markup For Web Services2001 · 2,403 citationsWith Jerry Robert Hobbs, Katia P. Sycara and Sheila A. McIlraith
  3. DAML-S: Web Service Description for the Semantic Web2002 · Lecture notes in computer science · 918 citationsWith Drew McDermott, Jerry Robert Hobbs, Katia P. Sycara and Sheila A. McIlraith
  4. The Role of Frame-Based Representation on the Semantic Web2001 · 205 citationsWith Deborah McGuinness
  5. Embracing "Web 3.0"2007 · IEEE Internet Computing · 188 citationsWith James A. Hendler

From OpenAlex, as of 21 October 2026.

  1. Among employers with 30+ full-time cases, OpenAI leads primary technical role H-1B pay at $310,000, and Amazon, Google and Microsoft file 57% of all casesIncludes Amazon. Across 440,669 certified US H-1B filings from 44 employers (FY2020–FY2026), OpenAI leads primary technical role base pay at $310,000 and xAI leads overall base pay at $290,000.
  2. More people shaping AI studied at Massachusetts Institute of Technology than at any other institutionIncludes Massachusetts Institute of Technology. We estimate where the people shaping AI studied and where their careers led. Massachusetts Institute of Technology leads with 467 former students, including 291 recorded doctorates.
  3. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other universityIncludes Massachusetts Institute of Technology. The Massachusetts Institute of Technology trained or employed 44 of the 187 AI major-prize winners, more than any other university. We compare doctorate and 5+ year employment links, career timing and current workplaces for 187 major-prize and 1,111 best-paper winners.
  4. The company share of AI researchers’ top papers was 31% in 2020–2024 and 8% in 1970–1974Includes World Wide Web Consortium. We estimate where the people shaping AI worked when their most-cited papers appeared: the company share was 31% in 2020–2024 and 8% in 1970–1974, and Google led all organizations in 2020–2024.

Colleagues

People with dated positions at the same organization in the same years.

Sources and credits

Photo: We have no published photo of Ora Lassila yet. Send us a free-licensed photo.

  1. Biographical Notes about Dr. Ora Lassila lassila.org. Checked 20 October 2026.
  2. Ora Lassila: RDF lassila.org. Checked 20 October 2026.
  3. The Semantic Web lassila.org. Checked 20 October 2026.
  4. Ora Lassila - Wikipedia en.wikipedia.org. Checked 20 October 2026.
  5. ApacheCon 07: Speaker Bio Ora Lassila archive.apachecon.com. Checked 20 October 2026.
  6. Ora Lassila lassila.org. Checked 20 October 2026.
  7. Ora Lassila - Connected Data World Conference | December 1-2-3rd 2021 dec-2021-conference.heysummit.com. Checked 20 October 2026.
  8. U.S. Semantic Technologies Symposium 2022 Program us2ts.org. Checked 20 October 2026.
  9. From the Semantic Web to Agentic AI: Ora Lassila on Knowledge Graphs, LLMs, and the Architecture of Machine Understanding odbms.org. Checked 20 October 2026.