Definition and Usage
定义和用法

The <fo:region-body> object defines the body region of a page.
<fo:region-body>对象是用于定义页面主体区域的。

XSL-FO uses the following elements to define the regions of a page:
XSL-FO 使用下列元素定义页面区域：

• <fo:region-body> defines the body region
  <fo:region-body>定义了主体区域
• <fo:region-before> defines the top region (header)
  <fo:region-before>定义了顶部区域（header）
• <fo:region-after> defines the bottom region (footer)
  <fo:region-after>定义了底部区域（footer）
• <fo:region-start> defines the left region (left sidebar)
   <fo:region-start>定义了左部区域（left sidebar）
• <fo:region-end> defines the right region (right sidebar)
  <fo:region-end>定义了右部区域（right sidebar）

Note: region-before, region-after, region-start, and region-end is a part of the region-body. To avoid text in the region-body to overwrite text in the other regions, the region-body must have margins at least the size of these regions.
注意：region-before、region-after、region-start 以及region-end 都是region-body[主题区域]的一部分。为了避免region-body[主题区域]文本覆盖其它区域的文本， region-body[主题区域]的边距至少必须与上述四个子区域的尺寸相同。

Tip: To provide multiple columns in the region-body set the column-count property to greater than 1!
提示：将“column-count”设置为大于1可以在主体区中提供多个列。

Note: If the overflow property has the value of "scroll", you cannot specify a column-count other than 1!
注意：如果overflow属性包含“scroll”属性值，那么你只能给column-count 指定1，而不能指定其它值。

Note: According to version 1.0 of the XSL-FO Recommendation, the padding and border-width properties must be 0.
注意：根据XSL-FO1.0推荐规则来说，页边填充[padding]和边宽[border-width]属性必须为0。

Syntax
语法

<fo:region-body> <!--	Contents:EMPTY -->
</fo:region-body>

Properties
属性

Example 1
案例1

XSL-FO uses page templates called "Page Masters" to define the layout of  pages. Each template must have a unique name:
XSL-FO使用名为“Page Masters”的页面模版来定义页面的层。每个模版必须拥有独立的名称：

<fo:simple-page-master master-name="intro"> <fo:region-body margin="5in" />
</fo:simple-page-master>

<fo:simple-page-master master-name="left"> <fo:region-body margin-left="2in" margin-right="3in" />
</fo:simple-page-master>

<fo:simple-page-master master-name="right"> <fo:region-body margin-left="3in" margin-right="2in" />
</fo:simple-page-master>

In the example above, three <fo:simple-page-master> elements, define three different templates. Each template (page-master) has a different name.
在上述案例中，三个<fo:simple-page-master>元素定义了三个不同的模版。每个模版（page-master）都包含一个不同的名称。

The first template is called "intro". It could be used as a template for introduction pages.
第一个模版名为“intro”。它可以作为介绍页面的模版使用。

The second and third templates are called "left" and "right". They could be used as templates for even and odd page numbers.
第二个和第三个模版名为“left”和“right”。它们可以作为奇、偶页面数使用。

Example 2
案例2

<fo:simple-page-master master-name="A4" page-width="297mm" page-height="210mm" margin-top="1cm" margin-bottom="1cm" margin-left="1cm" margin-right="1cm"> <fo:region-body margin="3cm"/> <fo:region-before extent="2cm"/> <fo:region-after extent="2cm"/> <fo:region-start extent="2cm"/> <fo:region-end extent="2cm"/>
</fo:simple-page-master>

The code above defines a "Simple Page Master Template" with the name "A4".
上述代码定义了一个名为“A4”的“Simple Page Master Template[简单页面主模版]”。

The width of the page is 297 millimeters and the height is 210 millimeters.
页面的宽度297毫米，高度为210毫米。

The top, bottom, left, and right margins of the page are all 1 centimeter.
页面的顶边距、底边距、左边距、右边距都为1厘米。

The body has a 3 centimeter margin (on all sides).
主体部分的所有边距都为3厘米。

The before, after, start, and end regions (of the body) are all 2 centimeters.
主体前、后、开头、结尾部分都是2厘米。

The width of the body in the example above can be calculated by subtracting the left and right margins and the region-body margins from the width of the page itself:
297mm - (2 x 1cm) - (2 x 3cm) = 297mm - 20mm - 60mm = 217mm.
上述案例中，主题宽度可以通过从页面本身宽度减去左、右边距和region-body[主体区域]的边距来计算。

Note that the regions (region-start and region-end) are not a part of the calculation. As described earlier, these regions are parts of the body.
注意：region-start 和 region-end并不作为计算的一部分。就像我们在前面说的那样，这些区域都是作为主体的一部分的。

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