Listing 2 extends the DITA base unordered list (ul) and list item (li) elements to create new elements that inherit from them to represent a collection of preconditions or constraints.

清单2扩展了DITA基础无序列表(ul)和列表条目(li)元素，以创建继承自它们的新元素，从而给出前提条件或约束的集合。

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As you may remember from Part 3, jQuery UI Tabs constructs its TAB interface from an unordered list. You already have a ul element that displays your breadcrumb navigation; it looks like Listing 5.

您可能还记得在第3部分，jQuery UI Tabs从一个无序列表中构造了它的选项卡式的界面。

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The previous list, for example, is an unordered list, created with the UL element.

举个例子，上述的列表是一个无序列表，使用UL元素创建的。

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