In this issue, the Invited Articles section is comprised of the article "Relational Transducers for Declarative Networking" by Tom Ameloot, Frank Neven, and Jan Van den Bussche. This article was selected from the 30th ACM SIGMOD-SIGACT-SIGART Symposium on Principles of Database Systems (PODS), held in Athens, Greece, from June 13th to June 15, 2011. I thank the Program Committee of PODS 2011, and the PC Chair, Thomas Schwentick, for their help in selecting this invited article. I am also grateful to JACM Associate Editor Phokion Kolaitis for his editorial work on this article.
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机译：在本期中，“邀请文章”部分由Tom Ameloot，Frank Neven和Jan Van den Bussche撰写的文章“用于声明性网络的关系转换器”。本文选自2011年6月13日至6月15日在希腊雅典举行的第30届ACM SIGMOD-SIGACT-SIGART数据库系统原理专题讨论会（PODS）。感谢PODS 2011程序委员会和PC主席Thomas Schwentick，感谢他们在选择这篇受邀文章方面的帮助。我还要感谢JACM副编辑Phokion Kolaitis对本文的编辑工作。
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