Read the first installment of the Practical data binding column in which Brett examines several important concepts in data binding, including round-tripping and semantic equivalence.
阅读实用数据绑定专栏的第一篇文章，Brett分析了数据绑定中的几个重要概念，包括往返和语义等价。
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In this paper, some necessary and sufficient condition about the equivalence of two column vector groups has been discussed.