Christoph Koch XML-based Execution Plan Format (XEP) 42-52 2016 Open Journal of Databases (OJDB) 3 1 https://www.ronpub.com/ojdb/OJDB_2016v3i1n03_Koch.html http://nbn-resolving.de/urn:nbn:de:101:1-201705194654 urn:nbn:de:101:1-201705194654 RonPub UG (haftungsbeschränkt)