Sandre n. : A Russian fish (Lucioperca sandre) which yields a valuable oil, called sandre oil, used in the preparation of caviare.

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Taxonomy
water data, datasets, free encyclopedia, specifications, compliance checks, National Service, onema, specification documents, interchanges, OIEau, databases, search, Référentiels, French National, Repositories, Management, common water, language.

Defination from the web:
Sandre establishes the common water data language of the French Water Information System (SIE : Système d'Information sur l'Eau, see Eaufance : ... (1) Sandre specification documents are specifications freely available for the definition, interchange and dissemination of water ...