这一节还演示了如何将置换组与抽象元素结合使用，以便构建XML模板。
This section also demonstrates the use of abstract elements with substitution groups to build an XML template.
置换组是可兼容内容模型交换元素的机制。
Substitution groups are a mechanism for swapping elements of compatible content models with each other.
也许扩展NIEM最容易的方式是通过使用置换组来做到，置换组允许您声明自己的元素和指定它是NIEM元素的替代。
Perhaps the easiest way to extend NIEM is through the use of substitution groups, which allow you to declare your own element and specify that it is substitutable for a NIEM element.
UML元素（变体选项）的置换
我们开始形成包含一组ArrayLists的ArrayList，在其中，每个构成的ArrayLists正好包含第一个置换群的一个元素。
We start by forming an ArrayList containing a set of ArrayLists, in which each of the constituent ArrayLists contains exactly one element of the first Permutation Group.
这一节还展示了如何组织XML元素以进行置换。
This section also demonstrates how to group XML elements for substitution.
使用“置换”模式，您能够修改元素的各个部分而不会影响到内容库中的初始的元素定义。
By applying the "replaces" pattern, you can modify parts of the element without affecting an original element definition in the content library.
专门的领域，如编程惯用语，可通过在任何允许根元素的地方进行置换来引入。
A specialized domain, such as programming phrases, can be introduced by substitution anywhere that the root elements are allowed.
置换一个元素的结果是创建出一个具有不同内容的新元素，但它仍然被所有相同的交付过程和功能模式所引用。
The net effect of replacing an element is the creation of a new element with a different content that is still referenced by all the same delivery processes and capability patterns.
在测试组件时，您可以选择可置换元素作为组件测试的输入。
When testing a component, you can select substitutable elements as input to a component test.
净化过程主要是加入锌粉到溶液，这样所有电位序在锌之后的元素都被置换出来并且凝固沉淀下来。
Purification is mainly done by adding zinc dust to the solution. As all the elements to be removed lie below zinc in the electrochemical series they can be precipitated by cementation.
结果表明，在天然金刚石中存在类质同象置换现象，其振动光谱特征随置换元素的不同而不同。
The results show that isomorphous substitution occur in the diamonds and the vibrational spectra characteristics of the diamonds depend on the substitution of different elements.
通过研究特殊四阶幻方的变换，结合对称群中的置换元素相互作用生成的轮换关系，给出了192阶和384阶变换群。
We will manifest the existence of the transformation groups of order 192 and 384 by studying the transformations and rotation relations.
元素的特征价数是以该元素一个原子可结合的氢原子数或可从一化合物中置换出的氢原子数来表示。
Hydrogen (h) always has valence 1, so other elements' valences equal the number of hydrogen atoms they combine with.
元素的特征价数是以该元素一个原子可结合的氢原子数或可从一化合物中置换出的氢原子数来表示。
Hydrogen (h) always has valence 1, so other elements' valences equal the number of hydrogen atoms they combine with.
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