In addition to the predefined fields, you can add extra custom fields to the extension mappings by defining custom attributes on the mappings.
除了预定义的字段外，通过对映射定义定制属性，您还可以向扩展映射添加额外的定制字段。
This should be considered an extra performance bonus rather than an incentive to convert attributes to elements, especially when data modeling considerations actually call for elements.
这应该看作是额外的性能收益，而不是将属性转换成元素的决定因素，尤其是当数据建模确实倾向于使用元素的时候更是如此。
With the column names stored as attributes, extra code is required to locate a collection of all of the elements from a specific column.
将列名存储为属性的话，需要额外的代码来从特定的列找到所有元素的集合。
In 1.0, extension attributes were often used in XSL: output to provide extra control over serialization.
在1.0中，扩展属性通常用于xsl：out put来为序列化提供额外的控制。
Notice that you just create a normal HTML form, but you use some extra Dojo-specific attributes.
请注意您刚创建了一个普通HTML表单，但使用了一些额外的Dojo相关属性。
MathML3 adds attributes to csymbol to allow explicit reference to OpenMath Content Dictionaries and further aligns with OpenMath by the addition of some extra structural elements.
MathML3向csymbol添加属性，以允许对OpenMathContentDictionaries的显式引用，并通过添加一些额外的结构元素，进一步贴近openmath。
Attributes allow you to place extra descriptive information into metadata that can be extracted using runtime reflection services.
属性允许您将额外的描述资讯置入中继资料，其可使用执行阶段反映服务来撷取。
The magneto-electric behaviors of the system attributes to the extra magnetism and lattice distortion effect.
体系的磁电行为变化取决于掺杂引起的额外磁性和晶格畸变效应。
These extra than 30 cards uniformly of belong to a speed onset twice the card for adding, have some still three attributes even are 4 attribute cards!
这三十几张卡片清一色的属于速度攻击双加的卡片，有一些还是三属性甚至是四属性卡片！
These extra than 30 cards uniformly of belong to a speed onset twice the card for adding, have some still three attributes even are 4 attribute cards!
这三十几张卡片清一色的属于速度攻击双加的卡片，有一些还是三属性甚至是四属性卡片！
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