This volume constitutes the pre-proceedings of the 28th International Symposium on Logic-Based Program Synthesis and Transformation (LOPSTR 2018), held on 4-6th September 2018 in Frankfurt am Main, Germany and co-located with the 20th International Symposium on Principles and Practice of Declarative Programming (PPDP 2018) and the 26th International Workshop on Functional and Logic Programming (WFLP 2018).

翻译：该卷是2018年9月4日至6日在德国美因河畔法兰克福举行的第28次基于逻辑的方案综合和转型国际专题讨论会(2018年)的预发本,与第20次宣布性方案拟定原则和做法国际专题讨论会(2018年PPDP)和第26次功能和逻辑方案编制国际讲习班(2018年WFLP)合用同一地点。