The 2nd Large Language Models for Ontology Learning Challenge Co-located with the 24th International Semantic Web Conference (ISWC 2025) November 2-6, 2025 Nara, Japan https://sites.google.com/view/llms4ol2025/homehttps://sites.google.com/view/llms4ol2025

Challenge Overview

The 2nd LLMs4OL Challenge@ISWC 2025 invites researchers and practitioners to explore the capabilities of Large Language Models (LLMs) in automating Ontology Learning (OL). As the Semantic Web evolves, automating the extraction and structuring of knowledge becomes paramount. This challenge focuses on leveraging LLMs to enhance OL processes, contributing to more intelligent and interoperable web systems. Building upon the success of the 1st LLMs4OL Challenge at ISWC 2024, this second edition aims to further the community's understanding and development of LLM-driven OL methodologies.

Challenge Tasks

Participants can engage in one or more of the following tasks:

* Task A - Text2Onto: Extract ontological terminologies and types from a raw text.

* Task B - Term Typing: Discover the generalized type for a lexical term.

* Task C - Taxonomy Discovery: Discover the taxonomic hierarchy between type pairs.

* Task D - Non-Taxonomic Relation Extraction: Identify non-taxonomic, semantic relations between types.

Each task is designed to address specific aspects of OL, encouraging innovative approaches and solutions.

Important Dates

* Test dataset release: June 1st, 2025

* Begin accepting system submissions: June 2nd, 2025

* End accepting system submissions: June 22nd, 2025

* Participants' Papers Submissions Due: July 5th, 2025

* Notification of Acceptance: July 19th, 2025

* Camera-ready due: July 30th, 2025

* ISWC 2025, Nara, Japan: November 2-6, 2025