【问题】
Docbook的pdf中，
正常表格式是这样的：
但是当表格在quote中的时候，就变成这样了：
即表格的头部header跑到底端了。
而且，如果单个entry的内容是多行的话，结果还会显示出多行：
所以，整个显示都是完全乱套了。
【解决过程】
1.直觉能想到的就是，去fo对应的table的xsl中去找找是否有相关的配置。
对应文件是：
docbook-xsl-ns-1.76.1\fo\table.xsl
2.把之前在table设置中自己添加的，给table的header添加背景色的设置：
<xsl:if test="ancestor::d:thead">
<xsl:attribute name="background-color">antiquewhite</xsl:attribute>
</xsl:if>去掉后，结果问题依旧。
3.后来去对比了一下，关于正常的表格和quote中不正常的表格所对应的fo中的内容。
正常的表格的fo内容：
<fo:block id="tbl.global_synopsis" keep-together.within-column="auto" space-before.minimum="0.5em" space-before.optimum="1em" space-before.maximum="2em" space-after.minimum="0.5em" space-after.optimum="1em" space-after.maximum="2em">
<fo:block font-weight="bold" font-size="12pt" hyphenate="false" space-after.minimum="0.4em" space-after.optimum="0.6em" space-after.maximum="0.8em" text-align="center" space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em" keep-with-next.within-column="always">表 1.1. global的语法</fo:block>
<fo:table border-before-width.conditionality="retain" border-collapse="collapse" border-start-style="solid" border-end-style="solid" border-top-style="solid" border-bottom-style="solid" border-start-width="1.5pt" border-end-width="1.5pt" border-top-width="1.5pt" border-bottom-width="1.5pt" border-start-color="black" border-end-color="black" border-top-color="black" border-bottom-color="black" table-layout="fixed" width="100%">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="4" column-width="proportional-column-width(1)"/>
<fo:table-header xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row keep-with-next.within-column="always">
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Directive</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Description</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Syntax</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green"><fo:block font-weight="bold">Example</fo:block></fo:table-cell>
</fo:table-row>
</fo:table-header>
<fo:table-body xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block><fo:inline color="brown">.global</fo:inline></fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>Makes <fo:inline color="brown">symbol</fo:inline> visible to the linker</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>.global symbol</fo:block></fo:table-cell><fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green"><fo:block><fo:inline color="brown">.global</fo:inline> MyAsmFunc</fo:block></fo:table-cell></fo:table-row><fo:table-row><fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block><fo:inline color="brown">.globl</fo:inline></fo:block></fo:table-cell><fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>Same as <fo:inline color="brown">.global</fo:inline></fo:block></fo:table-cell><fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>.globl symbol</fo:block></fo:table-cell><fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt"><fo:block><fo:inline color="brown">.globl</fo:inline> MyOtherAsmFunc</fo:block></fo:table-cell></fo:table-row></fo:table-body>
</fo:table>
</fo:block>quote中不正常的表格：
<fo:block id="tbl.balignl_syntax" keep-together.within-column="auto" space-before.minimum="0.5em" space-before.optimum="1em" space-before.maximum="2em" space-after.minimum="0.5em" space-after.optimum="1em" space-after.maximum="2em">
<fo:block font-weight="bold" font-size="12pt" hyphenate="false" space-after.minimum="0.4em" space-after.optimum="0.6em" space-after.maximum="0.8em" text-align="center" space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em" keep-with-next.within-column="always">表 1.3. balignl的语法</fo:block>
<fo:table border-before-width.conditionality="retain" border-collapse="collapse" border-start-style="solid" border-end-style="solid" border-top-style="solid" border-bottom-style="solid" border-start-width="1.5pt" border-end-width="1.5pt" border-top-width="1.5pt" border-bottom-width="1.5pt" border-start-color="black" border-end-color="black" border-top-color="black" border-bottom-color="black" table-layout="fixed" width="100%">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="4" column-width="proportional-column-width(1)"/>
<fo:table-header xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row keep-with-next.within-column="always">
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Directive</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Description</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block font-weight="bold">Syntax</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green"><fo:block font-weight="bold">Example</fo:block></fo:table-cell>
</fo:table-row>
</fo:table-header>
<fo:table-body xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block><fo:inline color="brown">.balignl</fo:inline></fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>Word align the following code to <fo:inline color="brown">alignment</fo:inline> byte boundary (<fo:inline color="brown">default=4</fo:inline>). Fill skipped words with <fo:inline color="brown">fill</fo:inline> (<fo:inline color="brown">default=0 or NOP</fo:inline>). If the number of bytes skipped is greater than max, then don't align (<fo:inline color="brown">default=alignment</fo:inline> ).</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green"><fo:block>.balignl {alignment} {, fill} {, max}</fo:block></fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt"><fo:block><fo:inline color="brown">.balignl</fo:inline></fo:block></fo:table-cell></fo:table-row></fo:table-body>
</fo:table>
</fo:block>对比后的结果，除了发现如下这一点点不一样的：
border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green"
其他好像也没看到有什么有意义的区别。
对于上述的border-bottom-width，border-bottom-style，border-bottom-color等配置，也好像和table的header的位置前后，没啥关系。
4.经过了千辛万苦的折腾，比较出来一个结果。
那就是，在正常的，不带quote的table的源码：
<table id="tbl.dot_word_syntax" ><title>.word的语法</title>
<tgroup cols="4" >
<colspec colnum="1" colname="col1" colwidth="1*" />
<colspec colnum="2" colname="col2" colwidth="1*" />
<colspec colnum="3" colname="col3" colwidth="1*" />
<colspec colnum="4" colname="col4" colwidth="1*" />
<thead>
<row><entry>Directive</entry><entry>Description</entry><entry>Syntax</entry><entry>Example</entry></row>
</thead>
<tbody>
<row><entry><emphasis>.word</emphasis></entry><entry>Define word <emphasis>expr</emphasis> (32bit numbers)</entry><entry>.word expr {, …}</entry><entry><emphasis>.word</emphasis> 144511, 0x11223</entry></row>
</tbody>
</tgroup>
</table>生成出来的（加上相关内容）的fo源码是：
”</fo:inline>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
<fo:basic-link external-destination="url(https://re-eject.gbadev.org/files/GasARMRef.pdf)" color="blue" text-decoration="underline">
http://re-eject.gbadev.org/files/GasARMRef.pdf</fo:basic-link>
</fo:block>
<fo:block id="tbl.dot_word_syntax" keep-together.within-column="auto" space-before.minimum="0.5em" space-before.optimum="1em" space-before.maximum="2em" space-after.minimum="0.5em" space-after.optimum="1em" space-after.maximum="2em">
<fo:block font-weight="bold" font-size="12pt" hyphenate="false" space-after.minimum="0.4em" space-after.optimum="0.6em" space-after.maximum="0.8em" text-align="center" space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em" keep-with-next.within-column="always">
表 1.2. .word的语法</fo:block>
<fo:table border-before-width.conditionality="retain" border-collapse="collapse" border-start-style="solid" border-end-style="solid" border-top-style="solid" border-bottom-style="solid" border-start-width="1.5pt" border-end-width="1.5pt" border-top-width="1.5pt" border-bottom-width="1.5pt" border-start-color="black" border-end-color="black" border-top-color="black" border-bottom-color="black" table-layout="fixed" width="100%">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="4" column-width="proportional-column-width(1)"/>
<fo:table-header xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row keep-with-next.within-column="always">
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Directive</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Description</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Syntax</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green">
<fo:block font-weight="bold">
Example</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-header>
<fo:table-body xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
<fo:inline color="brown">
.word</fo:inline>
</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
Define word <fo:inline color="brown">
expr</fo:inline>
(32bit numbers)</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
.word expr {, …}</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt">
<fo:block>
<fo:
inline color="brown">
.word</fo:inline>
144511, 0x11223</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
所以上面的含义，以_undefined_instruction为例，就是，此处分配了一个word=32bit=4字节的地址空间，里面存放的值是undefined_instruction。</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
而此处_undefined_instruction也就是该地址空间的地址了。用C语言来表达就是：</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
_undefined_instruction = &undefined_instruction</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
或</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
*_undefined_instruction = undefined_instruction</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
在后面的代码，我们可以看到，undefined_instruction也是一个标号，即一个地址值，对应着就是在发生“未定义指令”的时候，系统所要去执行的代码。</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
（其他几个对应的“软件中断”，“预取指错误”，“数据错误”，“未定义”，“（普通）中断”，“快速中断”，也是同样的做法，跳转到对应的位置执行对应的代码。）</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
所以：</fo:block>
<fo:block id="id9309178" wrap-option="wrap" text-align="start" space-before.minimum="0.8em" space-before.optimum="1em" space-before.maximum="1.2em" space-after.minimum="0.8em" space-after.optimum="1em" space-after.maximum="1.2em" hyphenate="false" white-space-collapse="false" white-space-treatment="preserve" linefeed-treatment="preserve" font-family="Microsoft YaHei" background-color="#F4F4F4" padding="1pt">
ldr pc, 标号1而带quote的xml源码：
<quote>
<table id="tbl.dot_word_syntax" ><title>.word的语法</title>
<tgroup cols="4" >
<colspec colnum="1" colname="col1" colwidth="1*" />
<colspec colnum="2" colname="col2" colwidth="1*" />
<colspec colnum="3" colname="col3" colwidth="1*" />
<colspec colnum="4" colname="col4" colwidth="1*" />
<thead>
<row><entry>Directive</entry><entry>Description</entry><entry>Syntax</entry><entry>Example</entry></row>
</thead>
<tbody>
<row><entry><emphasis>.word</emphasis></entry><entry>Define word <emphasis>expr</emphasis> (32bit numbers)</entry><entry>.word expr {, …}</entry><entry><emphasis>.word</emphasis> 144511, 0x11223</entry></row>
</tbody>
</tgroup>
</table>
</quote>生成的结果是：
”</fo:inline>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
<fo:basic-link external-destination="url(https://re-eject.gbadev.org/files/GasARMRef.pdf)" color="blue" text-decoration="underline">
http://re-eject.gbadev.org/files/GasARMRef.pdf</fo:basic-link>
</fo:block>
<fo:inline>
“
<fo:block id="tbl.dot_word_syntax" keep-together.within-column="auto" space-before.minimum="0.5em" space-before.optimum="1em" space-before.maximum="2em" space-after.minimum="0.5em" space-after.optimum="1em" space-after.maximum="2em">
<fo:block font-weight="bold" font-size="12pt" hyphenate="false" space-after.minimum="0.4em" space-after.optimum="0.6em" space-after.maximum="0.8em" text-align="center" space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em" keep-with-next.within-column="always">
表 1.2. .word的语法</fo:block>
<fo:table border-before-width.conditionality="retain" border-collapse="collapse" border-start-style="solid" border-end-style="solid" border-top-style="solid" border-bottom-style="solid" border-start-width="1.5pt" border-end-width="1.5pt" border-top-width="1.5pt" border-bottom-width="1.5pt" border-start-color="black" border-end-color="black" border-top-color="black" border-bottom-color="black" table-layout="fixed" width="100%">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="4" column-width="proportional-column-width(1)"/>
<fo:table-header xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row keep-with-next.within-column="always">
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Directive</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Description</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block font-weight="bold">
Syntax</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" background-color="antiquewhite" border-bottom-width="0.5pt" border-bottom-style="solid" border-bottom-color="green">
<fo:block font-weight="bold">
Example</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-header>
<fo:table-body xmlns:rx="http://www.renderx.com/XSL/Extensions" start-indent="0pt" end-indent="0pt">
<fo:table-row>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
<fo:inline color="brown">
.word</fo:inline>
</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
Define word <fo:inline color="brown">
expr</fo:inline>
(32bit numbers)</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt" border-end-width="0.5pt" border-end-style="solid" border-end-color="green">
<fo:block>
.word expr {, …}</fo:block>
</fo:table-cell>
<fo:table-cell padding-start="2pt" padding-end="2pt" padding-top="2pt" padding-bottom="2pt">
<fo:block>
<fo:inline color="brown">
.word</fo:inline>
144511, 0x11223</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
”</fo:inline>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
所以上面的含义，以_undefined_instruction为例，就是，此处分配了一个word=32bit=4字节的地址空间，里面存放的值是undefined_instruction。</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
而此处_undefined_instruction也就是该地址空间的地址了。用C语言来表达就是：</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
_undefined_instruction = &undefined_instruction</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
或</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
*_undefined_instruction = undefined_instruction</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
在后面的代码，我们可以看到，undefined_instruction也是一个标号，即一个地址值，对应着就是在发生“未定义指令”的时候，系统所要去执行的代码。</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
（其他几个对应的“软件中断”，“预取指错误”，“数据错误”，“未定义”，“（普通）中断”，“快速中断”，也是同样的做法，跳转到对应的位置执行对应的代码。）</fo:block>
<fo:block space-before.optimum="1em" space-before.minimum="0.8em" space-before.maximum="1.2em">
所以：</fo:block>
<fo:block id="id9309181" wrap-option="wrap" text-align="start" space-before.minimum="0.8em" space-before.optimum="1em" space-before.maximum="1.2em" space-after.minimum="0.8em" space-after.optimum="1em" space-after.maximum="1.2em" hyphenate="false" white-space-collapse="false" white-space-treatment="preserve" linefeed-treatment="preserve" font-family="Microsoft YaHei" background-color="#F4F4F4" padding="1pt">
ldr pc, 标号1结果比较，后者，即带quote的，不正常的那个，生成的结果，前后多了个fo:inline和引号：
<fo:inline>
“<fo:block id="tbl.dot_word_syntax"
…….
</fo:block>
”</fo:inline>
而两种table的fo的源码，都是完全一样的。
那就说明，就是加了fo:inline和引号，导致fop转换为pdf，导致了表格的头部跑到底部去了。
所以，现在就是去搞懂，为何会这样。
5.从官网中找到关于quote的解释，果然如我猜测，quote的确只是针对inline的，而根据之前的知识，fo格式化输出内容的话，一种是inline，主用于单个，单行文字类的，还有一种是block，而此处，由于添加了quote，导致输出fo中，变成了一个inline中包含table等block内容，所以，显示异常的话，那也就在清理之中了。
然后又在官网中找到了，如果对于block的quote，可以用blockquote，现在去试试。
即，把之前的quote改为blockquote，变成：
<blockquote>
<table id="tbl.dot_word_syntax" ><title>.word的语法</title>
<tgroup cols="4" >
<colspec colnum="1" colname="col1" colwidth="1*" />
<colspec colnum="2" colname="col2" colwidth="1*" />
<colspec colnum="3" colname="col3" colwidth="1*" />
<colspec colnum="4" colname="col4" colwidth="1*" />
<thead>
<row><entry>Directive</entry><entry>Description</entry><entry>Syntax</entry><entry>Example</entry></row>
</thead>
<tbody>
<row><entry><emphasis>.word</emphasis></entry><entry>Define word <emphasis>expr</emphasis> (32bit numbers)</entry><entry>.word expr {, …}</entry><entry><emphasis>.word</emphasis> 144511, 0x11223</entry></row>
</tbody>
</tgroup>
</table>
</blockquote>然后生成的fo中，对应的在表格的fo源码前后的fo:inline，也变成了fo:block了，然后再生成pdf，其中的表格的显示，也就正常了，表格的头部，也就显示在表格上面，不是底部了：
【总结】
表格的头部显示在底部了，以及表格中单个entry中多行内容的话，会导致显示出多行的内容，其原因在于是把block等类型的table等内容，放在了本属于inline性质的quote中，导致生成的fo源码中，block等类型的table等内容的前后，加上了一个fo:inline，导致显示结果错乱，出现表格头部跑到底部，单格内容多行显示等问题。
解决办法很简单，把quote改为对应的blockquote，即可。
这样blockquote中，即使包含了block类型的table等内容，也可以正常格式化成block输出了。
转载请注明：在路上 » 【已解决】Docbook生成的pdf中，当表格在quote中时，表格头部却在底端显示，而且如果内容是多行的，还会显示出多行