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“世界数据流和远程通讯计划”（ＵｎｉｖｅｒｓａｌＤａｔａｆｌｏｗａｎｄＴｅｌｅｃｏｍｍｕｎｉｃａｔｉｏｎ，简称ＵＤＴ），是国际图联提出的第四个核心计划。国际图联的核心计划开始于第３９届国际图联大会。ＵＢＣ和ＵＡＰ两大核心计划分别于１９７３、１９７４年提出
The “Universal Dataflow and Telecommunication” (UDT) is the fourth core plan proposed by IFLA. The core program of IFLA begins with the 39th IFLA General Assembly. The two core UBC and UAP plans were put forward in 1973 and 1974 respectively