The 5th LDBC TUC meeting will take place in Athens on 14.11.2014, this is the agenda. We welcome RDF and graph database users to explain their use-cases, describe the limitations they have found in current technology and see the progress of the LDBC benchmarks i.e. the Semantic Publishing Benchmark (SPB) and the Social Network Benchmark (SNB).

This meeting is the 5th edition of a series of TUC meetings organized by LDBC. The previous meeting was held in Amsterdam on 03.04.2014 being well attended by both RDF and graph database communities. All talks are available on the LDBC YouTube channel.

Three talks by LDBC members aimed to give an update on the status of the project and its benchmarks:

Peter Boncz (VUA), the technical coordinator of the LDBC project, gave a short introduction to the LDBC goals and status: video, pptx.

Norbert Martinez (UPC) presented the status of the LDBC Social Network Benchmark task force: video, pdf.

Venelin Kotsev (ONTOTEXT) gave an update on the LDBC Semantic Publishing Benchmark task force: video, pptx.

The rest of the time was reserved for our users who presented the challenges they are facing when trying to solve real-world problems in various domains (e.g. bioinformatics, energy, engineering, geo, cultural heritage domain) using RDF and graph database technologies. We list below their talks with links to their recordings:

Alexandru Iosup (TU Delft): "Towards Benchmarking Graph-Processing Platforms", video, ppt. Mike Bryant (Kings College): "The EHRI Project: Archival Integration with Neo4j", video, pptx. Thilo Muth (University of Magdeburg): "MetaProteomeAnalyzer: a graph database backed software for functional and taxonomic protein data analysis", video, pptx. Davy Suvee (Janssen Pharmaceutica / Johnson & Johnson): "Euretos Brain - Experiences on using a graph database to analyse data stored as a scientific knowledge graph", video, pdf. Yongming Luo (TU Eindhoven): "Regularities and dynamics in bisimulation reductions of big graphs", video, pdf. Christopher Davis (TU Delft): "Enipedia - Enipedia is an active exploration into the applications of wikis and the semantic web for energy and industry issues", video, pdf. Bastiaan Bijl (Sysunite): "Using a semantic approach for monitoring applications in large engineering projects", video, pdf. Frans Knibbe (Geodan): "Benchmarks for geographical data", video, pptx. Armando Stellato (University of Rome, Tor Vergata & UN Food and Agriculture Organization): "VocBench2.0, a Collaborative Environment for SKOS/SKOS-XL Management: scalability and (inter)operatibility challenges", video, pptx. Ralph Hodgson (TopQuadrant): "Customer experiences in implementing SKOS-based vocabulary management systems", video, pdf. Simon Jupp (European Bioinformatics Institute): "Delivering RDF for the life science at the European Bioinformatics Institute: Six months in.", video, pdf. Jerven Bolleman (Swiss Institute of Bioinformatics): "Breakmarking UniProt RDF. Sparql queries that make your database cry", video, pdf. Rein van 't Veer (Digital Heritage Netherlands): "Time and space for heritage", video, pptx.

All these talks pointed to challenges in adopting and using RDF and graph databases. They generated discussions on what needs to be stressed when designing and building benchmarks. Feedback from TUC meetings such as this one are carefully considered, analyzed by LDBC and are definitely influencing the development of our benchmarks. We look forward to more challenging presentations and input from RDF and graph databases users in the following TUC meeting.