team LESL · MIMathon Porto 2026
Lea, Eliott, Sattisvar and Louis. Three organisations: Kereval, Dolfin, Askem. One shared method for harmonising messy open data against multiple open standards, validated on three Porto Open Data use cases.
Software quality and interoperability validation at Kereval. Brings the rigour that turns "it runs on my laptop" into "this output validates against the official standard schemas".
Software quality and interoperability validation at Kereval. Watches conformance gaps: missing required fields, wrong cardinalities, units mismatches, the things that break downstream platforms silently.
Author of Dolfin, the human-friendly ontology language used as the canonical pivot for every UC. Designs the model so that domain experts can read it and tools can compile it.
Method design and delivery at Askem. Architects the adapter-pivot-writer split, ships the pages and the harmonizer packages, keeps the work end-to-end reproducible.
A human-friendly ontology language. Backend-independent: the same Dolfin file targets graph databases, relational stores, document stores. Designed so domain experts can read it without training.
dolfin.fr ↗
Software quality and interoperability testing. The team that turns standards conformance from a claim into a verifiable property.
kereval.com ↗
End-to-end delivery of data harmonisation projects: method design, pipeline implementation, documentation, training. Built on Dolfin and on open standards.
askem.eu ↗Three Porto Open Data tracks, three different standards positions (gap, align, partial), all following the same pivot-and-writers method. Each page links the canonical Dolfin model, the source data, the harmonized outputs, and the full source code.
dataModel.ParksAndGardens.PointOfInterest, categories dual-bound to schema.org and Wikidata.Each use case lifts source data to a Dolfin canonical model, then derives every output format from it. New source: one adapter. New consumer: one writer. The full method is documented as a single reusable skill, applicable to any harmonisation project beyond the MIMathon.