We provide a simple proof of a recent result of Morton and van Alten that the canonical extension of a bounded distributive lattice is its free completely distributive extension. We show that this can be used to easily obtain a number of results, both known and new.

中文翻译：

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规范扩展、自由完全分布格和完全收缩

我们提供了 Morton 和 van Alten 最近结果的一个简单证明，即有界分配格的规范扩展是其自由完全分配扩展。我们表明，这可以用来轻松获得许多已知的和新的结果。