RDF serves as the foundation upon which the Semantic Web is built: it is a standard to represent data as a directed, labeled graph.
RDF是语义web建立的基础：将数据表示成有向加权图的一种标准。
The nodes of the graph are resources and literals, and they are connected by directed edges, which are labeled with predicates.
图的节点是资源和文字，节点之间用有向边连接，边上用谓词标记。
Edges, leaves, and other nodes of an XML-based graph can be labeled with text.
基于XML的图形的边、叶子和其他节点可以用文本进行标注。
The minimum labeling spanning tree(MLST) problem is an NP-hard problem in which, given a graph with labeled edges, one seeks a spanning tree with the least number of labels.
最小标记生成树就是其中之一，它的目标是给出一个边上带有颜色的图，计算使用颜色种类最少的生成树。
The minimum labeling spanning tree(MLST) problem is an NP-hard problem in which, given a graph with labeled edges, one seeks a spanning tree with the least number of labels.
最小标记生成树就是其中之一，它的目标是给出一个边上带有颜色的图，计算使用颜色种类最少的生成树。
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