Nov 4 – 8, 2019
Adelaide Convention Centre
Australia/Adelaide timezone

Design principles of the Metadata Querying Language (MQL) implemented in the ATLAS Metadata Interface (AMI) ecosystem

Nov 5, 2019, 3:30 PM
Hall F (Adelaide Convention Centre)

Hall F

Adelaide Convention Centre

Poster Track 4 – Data Organisation, Management and Access Posters


Jerome Odier (LPSC/CNRS (Grenoble, FR))


ATLAS Metadata Interface (AMI) is a generic ecosystem for metadata aggregation, transformation and cataloging benefiting from about 20 years of feedback in the LHC context. This poster describes the design principles of the Metadata Querying Language (MQL) implemented in AMI, a metadata-oriented domain-specific language allowing to query databases without knowing the relation between tables. With this simplified yet generic grammar, MQL permits writing complex queries much more simply than Structured Query Language (SQL). The poster describes how AMI compiles MQL into SQL queries using the underlying table relations graph automatically extracted through a reflexion mechanism.

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Primary authors

Jerome Odier (LPSC/CNRS (Grenoble, FR)) Jerome Henri Fulachier (Centre National de la Recherche Scientifique (FR)) Fabian Lambert (LPSC Grenoble IN2P3/CNRS (FR))

Presentation materials