tailieunhanh - Harmonized World Soil Database

Two interfaces to Gamma are available: an ad-hoc query language and an embedded query language inter- face in which queries can be embedded in a C program. When a user invokes the ad-hoc query interface, a Query Manager (QM) process is started which immediately connects itself to the CM process through the UNIX Internet socket mechanism. When the compiled query interface is used, the preprocessor translates each embedded query into a compiled query plan which is invoked at run-time by the program. A mechanism for passing parameters from the C program to the compiled query plans at run time is also provided | Harmonized World Soil Database Harmonized World Soil Database version i Harmonized World Soil Database Version February 2012 Coordination Freddy Nachtergaele 1 Harrij van Velthuizen 2 Luc Verelst 2 David Wiberg 2 Contributors Niels Batjes 3 Koos Dijkshoorn 3 Vincent van Engelen 3 Guenther Fischer 2 Arwyn Jones 5 Luca Montanarella 5 Monica Petri 1 Sylvia Prieler 2 Edmar Teixeira 2 Xuezheng Shi4 1 Food and Agriculture Organization of the United Nations FAO 2 International Institute for Applied Systems Analysis IIASA 3 ISRIC-World Soil Information 4 Institute of Soil Science - Chinese Academy of Sciences ISSCAS 5 Joint Research Centre of the European Commission JRC DISCLAIMER The designations employed and the presentation of materials in Harmonized World Soil Database do not imply the expression of any opinion whatsoever on the part of the Food and Agriculture Organization of the United Nations FAO the International Institute for Applied Systems Analysis IIASA ISRIC-World Soil Information Institute of Soil Science - Chinese Academy of Sciences ISSCAS or Joint Research Centre of the European Commission JRC concerning the legal status of any country territory city or area or its authorities or concerning the delimitation of its frontiers or boundaries. 2008-2012 COPYRIGHT FAO IIASA ISRIC ISSCAS JRC All rights reserved. No part of this Harmonized World Soil Database may be reproduced stored in a retrieval system or transmitted by any means for resale or other commercial purposes without written permission of the copyright holders. Reproduction and dissemination of material in this information product for educational or other non-commercial purposes are authorized without any prior written permission from the copyright holders provided the source is fully acknowledged. Full acknowledgement and referencing of all sources must be included in any documentation using any of the material contained in the Harmonized World Soil Database as follows FAO IIASA ISRIC ISS-CAS