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2. Engineering new paths to water data;Beran;Comput. Geosci.-U.K.,2009
3. EQL-Lite: effective first-order query processing in description logics;Calvanese,2007
4. Observations and Measurements – Part 1-Observation Schema Version 1.0 OGC;Cox,2007
5. Observations and Measurements - Part 2-Sampling Features Version 1.0 OGC;Cox,2007