LDAC2025 - Linked Data
in Architecture
and Construction
Call for Participation
LDAC presents a forum for technical and applied research on the usage of semantic web, linked data and web of data technologies for architecture and construction (design, engineering, construction, operation).
The workshop aims at gathering researchers, industry stakeholders, and standardization bodies of the broader Linked Building Data (LBD) community. The workshop series has been held yearly since 2012, taking place in numerous locations and venues, sometimes co-located with AEC or web technology conferences and sometimes as independent events. The workshop welcomes industry participation and brings together experts from the AEC field with computer scientists and software developers familiar with (semantic) web technologies.
Call for Papers (PDF)Three Tracks
LDAC2025 takes place in Porto, Portugal, and is co-located with EC3-CIB W78 2025. As in the past years, the workshop covers work from three perspectives: research, technical discussions, and industry cases. In short, LDAC welcomes stakeholders from research and practice and serves as a communication platform to advance and innovate the use of linked data in architecture and construction.
Semantics Scope
LDAC aims at providing a forum for technical discussion on the topic of handling data in architecture and construction. A large part of the workshop is concerned with the use of (semantic) web technologies. Research is welcomed on the use of ontologies and vocabularies for representing building data, 3D geometry, product data, geospatial data, infrastructure data, HVAC data, sensor data, and so forth.
Focus on Data
Additionally, the workshop welcomes work on how to combine these highly semantic datasets with other data sets, which in the case of architecture and construction consist mainly of geometry and sensor data streams. Using different data storage techniques (semantic data stores, time series databases, key-value stores), the purpose of the LDAC workshop is to investigate ways in which data can be combined into a complete and holistic set of available building data.
Industry Practice
Practical techniques of combining datasets in the current web-based and data-driven world are explored: Internet of Things, Machine Learning, Digital Twins, Building Information Modelling. A number of industry cases are invited, presenting interesting ideas, use cases, solutions or experience reports related to practical applications at any stage of construction lifecycle.
Topics
Workshop Topics
The LDAC2025 topics include the following. These are indicative topics, similar other topics are welcome as well.
Linked Building Data
- Knowledge graphs for buildings
- GIS-BIM integration using linked data
- Building-related ontologies: BOT, Brick, SOSA/SSN, OMG/FOG, OPM, DOT, IFC
- Infrastructure: rail, road, infra
- Construction site automation using linked data
- Geometry representations and querying using linked data
- Linked Building Data management and collaboration
Ontology Engineering
- Mapping and alignment of data or ontologies
- Graph data modelling
- Semantic enrichment for the AEC industry
- Reasoning and querying
- Rule and constraint systems
- Ontologies and Machine Learning
Systems Development and Integration
- Operational system integration
- Semantic digital twins
- Web-development
- Large Language Models and Natural Language Processing and Linked Building Data
- GenAI and Linked Building Data
- Graph Analytics
- Security and access control
Submission
Submission
Submission and publication of LDAC articles are handled through the ConfTool platform and the CEUR-WS Proceedings publication platform.
Program Committee
- Lasitha Chamari
- David Chaves
- Gonçal Costa
- Aaron Costin
- Alex Donkers
- Diellza Elshani
- Raúl García-Castro
- Philipp Hagedorn
- Ranjith Soman
- Felix Larrinaga
- Maxime Lefrançois
- Dimitris Mavrokapnidis
- Claudio Mirarchi
- Jyrki Oraskari
- Pieter Pauwels
- Ekaterina Petrova
- María Poveda-Villalón
- Dimitrios Rovas
- Ana Roxin
- Oliver Schulz
- Sebastian Seiss
- Madhumitha Senthilvel
- Daniele Spoladore
- Walter Terkaj
- Jeroen Werbrouck
- Sven Zentgraf
- Yuan Zheng
Important Dates
Registration opens:
January 31, 2025
Abstract submission deadline (optional - no review):
January 20, 2025
Paper submission deadline (extended):
January 27, 2025
February 15, 2025
Notification of acceptance (paper):
March 24, 2025
Poster submission deadline:
April 7, 2025
April 16, 2025
Paper revision deadline:
April 7, 2025
Notification of acceptance (revised papers):
April 21, 2025
Notification of acceptance (poster):
May 5, 2025
Camera ready paper submission:
May 5, 2025
LDAC Workshop: July 9-11, 2025
Scientific papers
Scientific papers are welcome for submission in the EC3-CIB W78-LDAC 2025 ConfTool platform. Submit a paper of max. 14 pages (PDF) before the submission deadline. Please follow the CEUR-WS Proceedings template (Word, LaTeX) in one-column format, and make a submission directly via ConfTool in PDF. This can also be prepared using the template file in Overleaf.
Each paper will be reviewed (single-blind, no need to anonymize the papers) by at least two independent reviewers from the Program Committee. Accepted papers will be published as part of a separate volume of the CEUR-WS proceedings separated by full papers (10-14 pages) and short papers (5-9 pages). This does not include the poster contributions, which can be submitted in a separate poster track. All CEUR-WS proceedings are scopus-indexed.
Poster track
Similar to last year, we introduce a PhD poster track, to present and demonstrate ongoing research and development related to Linked Data in Architecture and Construction. Posters will be presented in a separate session where attendees can move between posters, encouraging in-depth discussions with other participants and experts in the field. We particularly encourage early-career PhD researchers to submit a poster with their research approaches and results. A poster presentation may also include a live demonstration of research prototypes alongside the poster. To present a poster at LDAC2025, you have to submit an extended abstract of your work via the EC3-CIB W78-LDAC 2025 ConfTool platform. Extended abstracts for the PhD poster track must contain max. 500 words describing the content of the work to be presented in the poster. Submissions are reviewed by the program committee regarding their topicality and quality. They will not be published in the workshop proceedings.
CEUR Workshop Proceedings
All CEUR-WS proceedings are scopus-indexed. Previous proceedings can be found here:
- LDAC 2024 - CEUR-WS Proceedings Vol. 3824
- LDAC 2023 - CEUR-WS Proceedings Vol. 3633
- LDAC 2022 - CEUR-WS Proceedings Vol. 3213
- LDAC 2021 - CEUR-WS Proceedings Vol. 3081
- LDAC 2020 - CEUR-WS Proceedings Vol. 2636
- LDAC 2019 - CEUR-WS Proceedings Vol. 2389
- LDAC 2018 - CEUR-WS Proceedings Vol. 2159
For more information or questions, you can contact the organisers at ldac2025[AT]linkedbuildingdata.net.
Keynotes
Keynotes
The LDAC workshop will host two keynote presentations, one on Thursday and one on Friday.
Jakob Beetz
Design Computation Lab, RWTH Aachen, Germany
Univ.-Prof. Dr. Jakob Beetz is a full professor at RWTH Aachen University and leads the Design Computing group. His research focuses on interoperability, and on collaborative and sustainable design and construction in the built environment. Over the past 25 years, during numerous international research projects, he has found a fair number of nails for the LDAC hammer—while occasionally battering at screws and jamming it against welded bolts. He is author of more than 120 scientific peer-reviewed publications and co-editor and -author of the books Building Information Modeling - Technology Foundations and Industry Practice (English version, 2018) resp. Building Information Modeling - Technologische Grundlagen und industrielle Praxis (German, 2015). He co-founded the Open Source collaboration platform bimserver.org and lay the foundations to the OWL representation of the Industry Foundation Classes (IFC) referred to as ifcOWL. He has participated in numerous research projects including EU FP7 DURAARK, EU H2020 BIM4Ren, SPP 100+ and is active in committees for the standarization of interoperability in information exchange for the building industry on national (DIN), EU (CEN) and international (ISO, buildingSMART, W3C) levels.
Keynote Title
20 years of Linked Building Data
20 years ago, in the middle of the second AI winter, first papers on the potential use of Semantic Web and Linked Data methods and technologies for the fragmented and heterogenous building industry began to emerge. Since then, a wealth of controlled vocabularies, interoperability frameworks and quasi-standards for many aspects of supporting planning and building processes have sprung from a vivid and highly cooperative community. In this presentation, the mayor developments, findings, and insights of this community are presented along with lessons learned, dead ends and disappearing knowledge. At the core, a systematic quantitative and qualitative review of the major vocabularies is presented that allows a critical look at benefits, challenges and limitations of the use of LDAC approaches in research and practice.
Beatriz Gonçalves Crisóstomo Esteves
IDLab, Ghent University, Belgium
Beatriz Esteves is a postdoctoral researcher at the Knowledge on Web scale (KNoWS) group of IDLab - Ghent University, Belgium, working on the intersection of policy modelling, Semantic Web, personal data protection, trusted data flows and decentralised datastores. Her line of research is directed at machine-interpretable representation of information related to the data protection domain, focusing on semantic and decentralised technologies that promote trust and transparency on the publication and sharing of personal data on the Web while complying with data protection regulatory requirements. She is an active contributor and editor of specifications for the following W3C CGs: Data Privacy Vocabularies and Controls Community Group (W3C DPVCG); Open Digital Rights Language Community Group (W3C ODRL CG).
Keynote Title
Paving the way from privacy to trust
People worried about privacy often think our personal data is being shared too easily. But the real issue is actually the opposite: our data doesn't flow smoothly enough, pushing companies to resort to cheaper or easier— sometimes illegal—shortcuts just to speed up data exchanges, which more often than not aren't the most privacy-friendly options. We want to build a world where personalized, tech-assisted, Trustflows enable parties to reliably and sustainably exchange data, goods, and services, negotiating on the appropriate legal ground to do so, as an alternative to today's overuse and misuse of informed consent. To facilitate these mutually beneficial interactions, we are developing technologies to assist with legal processes towards creating and maintaining long-term trust relationships between humans, businesses and machines.
Program
The LDAC program includes a Workshop with Poster Track and Industry Track.
The LDAC 2025 workshop is organised as a two-day workshop, prior to the EC3-CIB W78 conference, and in parallel to the EC3 Summer School. This includes keynote presentations, plenary research paper sessions, a poster track, an industry track, and social activities.
Overall program
This year, there is no LDAC Summer School, there is only a Workhop. Of course, there is also the EC3 Summer School that takes place on the same location, in parallel. LDAC attendance is limited to the LDAC workshop, however. The below schedule presents a tentative version of the program. This is subject to limited changes.
Research track
All submitted papers are scheduled in 3 plenary sessions, spread over Thursday and Friday. No sessions are planned in parallel and everything is plenary.
Thursday morning (11h00-13h00): CONSTRUCTION - chair Pieter Pauwels
-
A Standards-Based Approach to BIM-GIS Integration: Extending the Multi-Model Container Schema
Judith Krischler, Sebastian Schilling, Jakob Taraben, Maximilian Sternal, Christian Koch, Christian Clemen
article -
BIM Data Content Guiding Takt Production Material Flow: IFC Meets MTS Supply Chain
Otto Antti Alhava, Jyrki Oraskari, Tommi Arola, Tero Järvinen, Markus Järvenpää, Bettina Ruottinen
article -
Linked Data for Structural Diagnostics: A Semantic Framework for Sustainable Infrastructure Management
Paul-Christian Schuler, Mahsa Mirboland, Yannic Stark, Abdullah Al Mohammad, Christian Koch
article -
Continuous Calculation of Key Performance Indicators for Buildings through an Application Layer Connected to a Knowledge Graph
Christian Schmid, Sergio Acero Gonzalez, Sascha Stoller, Wolfram Willuhn, Emanuele Laurenzi, James Allan
article
Thursday afternoon (14h30-16h30): ONTOLOGIES - chair Walter Terkaj
-
Update of the standard-based ontology network for information requirements in digital construction projects
Sven Zentgraf, Martina Mellenthin Filardo, Liu Liu, Philipp Hagedorn, Jürgen Melzner, Markus König
article -
Representing Normative Regulations in OWL DL for Automated Compliance Checking Supported by Text Annotation
Ildar Baimuratov, Denis Turygin
article -
A shared construction resource ontology for semantically aligning cost and time domains in construction projects
Philipp Hagedorn, Jacopo Cassandro, Katharina Sigalov, Claudio Mirarchi, Alberto Pavan, Markus König
article -
An Ontology-Driven Approach for Integrating Heterogeneous Data Sources to Enhance Urban Biodiversity and Sustainable Building Design
Albin Ahmeti, Defne Sunguroglu Hensel, Cédric Pruski, Jakub Tyc, Michael Hensel
article -
A Modular Ontology Stack for Integrating OpenBIM and Bayesian Structural Health Monitoring and Prediction
Cedric Driesen
article
Friday morning (11h-13h): SEMANTICS - chair André Borrmann
-
5G-Enabled Augmented Reality for Dynamic Interaction with Linked Building Data and Voxelised Spaces
Chu Han Wu, Sigrid Brell-Cokcan
article -
Developing a RAG-Based System for Natural Language Access to Linked Building Data on Construction Sites
Lukas Kirner, Jyrki Oraskari, Sigrid Brell-Cokcan
article -
Comparative Analysis of Approaches for Geometric Data Representation in RDF
Diellza Elshani, Ali Nakhaee, Anthony A. Arrascue, Haris Isakovic, Navid Hedayati, Janakiram Karlapudi, Thomas Wortmann
article -
Ontology-Based Construction Progress Monitoring: A Conceptual Framework
Asha Dulanjalie Palihakkara, Carlos Osorio-Sandoval, Walid Tizani, Zigeng Feng
article -
AI-Agent Application for Semantic Data Enrichment in Ventilation Systems Using National Nomenclature for IFC and GS1-Based Product Information
Alhava, Otto; Arola, Tommi; Torro, Osku; Järvenpää, Markus; Järvinen, Tero; Ruottinen, Bettina
article
Industry Track
As part of the workshop, we invite companies to present interesting cases, innovation, research, and development related to Linked Data in Architecture and Construction in an industry market place. Do you have relevant software to present to workshop participants, or are you in an AEC organisation that deploys, requires or consumes linked data, then this is your place to be. The industry market place will take place over the two workshop days, and especially Thursday afternoon, from 15h to 18h and allows you to talk to industry representatives, researchers and summer school participants during the breaks and sessions.
Participation in the industry market place is available through the Sponsoring Packages of LDAC. Please contact ldac2025[AT]linkedbuildingdata.net directly in case of interest.
MARKET PLACE (Thursday, 16h30-19h30)
- Bentley
- Pallas
- neanex
- BIM-Connected
Collocation with EC3 Summer School
The LDAC 2025 workshop takes place in the same building as the EC3 Summer School, even though the two events are entirely in parallel with separate programs and registrations. It is not possible to register for both the EC3 Summer School and the LDAC workshop. Coffee breaks, lunches, and also the final dinner.on Friday are nevertheless collocated, and together with EC3 Summer School participants.
Poster Track
In the LDAC2025 Workshop, we will repeat the PhD poster track that was initiated in 2024. This poster track allows junior researchers to present and demonstrate ongoing research and development related to Linked Data in Architecture and Construction. Posters will be presented in a separate session where attendees can move between posters, encouraging in-depth discussions with other participants and experts in the field. We particularly encourage early-career PhD researchers to submit a poster with their research approaches and results. A poster presentation may also include a live demonstration of research prototypes alongside the poster.
Thursday afternoon (16h30-19h30): POSTER and INDUSTRY TRACK
-
Implementation of Natural Language Processing Techniques for the Automatic Extraction and Formalization of Requirements in the Construction Domain
Insaf Nahri, Romain Pinquié, Philippe Véron, Nicolas Bus, Mathieu Thorel -
A Knowledge Graph as a Decision Support System for Urban Green Systems
Albin Ahmeti, Jakub Tyc, Michael Hensel
extended abstract -
Developing Monitoring Ontologies for Embankment Dams
Alexandra Rosa, Miguel Azenha, Joana Carreto
extended abstract -
BIM-Based Solutions for Coordination and Management Control: Automation of Cost Estimation in Construction Projects
Giorgia Marcellino, Pedro Mêda Magalhães, Gianmaria Silvello, Carlo Zanchetta -
Toward an Ontology-Informed Framework for Robotic Timber Construction
Ali Nakhaee, Diellza Elshani, Thomas Wortmann
extended abstract
Registration
Registration
Registration for the workshop is open, and takes place through the EC3-CIBw78-LDAC ConfTool. Several combinations of tickets are available.
What is included
Registration for the LDAC workshop includes access to all sessions in the workshop, including coffee breaks and lunches. Also the opening reception is included, as well as access to the market place and poster session. For the Friday dinner, a separate registration ticket needs to be booked at 60EUR per person (80EUR after 1 July).
Cancellation policy
Please refer to the cancellation policy that needs to be agreed with at the time of registration in the EC3-CIBw78-LDAC ConfTool.
Prices
Early bird - until 31 March 15 May (extended):
- Workshop: 260 EUR (student) / 320 EUR (regular)
- Workshop + EC3-CIB w78 conference: 720 EUR (student) / 900 EUR (regular)
Standard - from 1 April 16 May until 1 July:
- Workshop: 320.00 EUR (student) / 380 EUR (regular)
- Workshop + EC3-CIB w78 conference: 900.00 EUR (student) / 1080 EUR (regular)
Late - after 1 July:
- Late Workshop: 370.00 EUR (student) / 430 EUR (regular)
- Late Workshop + EC3-CIB w78 conference: 1040.00 EUR (student) / 1220 EUR (regular)
Venue
Collocated with EC3-CIB W78
The LDAC2025 Workshop will take place in the University of Porto, more particularly in the FEUP - Faculdade de Engenharia da Universidade do Porto.
EC3-CIB W78
LDAC2025 will be collocated with the EC3 - CIB W78 joint conference! The EC3 - CIB W78 conference takes place from 14 to 17 July, also in Porto. Furthermore, the EC3 Summer School on Computing in Construction is scheduled from 7 to 11 July in the same premises of the LDAC workshop. Hence, there will be overlapping activities and joint events from 9 to 11 July. Furthermore, social excursions and activities will be scheduled on Saturday 12 July for those that stay for LDAC as well as EC3-CIB W78.
The registration system includes diverse combi-tickets for these events.
Venue
LDAC2025 takes place at the FEUP - Faculdade de Engenharia da Universidade do Porto. The Faculty of Engineering is part of the University of Porto. Porto is located in northern Portugal. Its historic city center is a UNESCO World Heritage site since 1996. It is famous for its wine and its location around the river Douro.
