我继承了一个doc发布流程，该流程使用Apache FOP同时使用DocBook并构建html和PDF输出。该项目已经启动，但从未完成。通过大量的调整，我能够获得大部分构建的文档集（20+），除了少数几个，并且它们都因为SEVERE代码而失败，并且具有以下两个条件之一：
"fo:flow" is missing child elements. Required content model: marker*
"fo:block" is not a valid child of "fo:root"
来自docbook和docbook-fop的xml输出检查结果良好。
一本书中的fop错误，例如，＃34; EndecaGloss＆＃34;指向此字符串的结尾：
<fo:flow flow-name="xsl-region-body" start-indent="4pc" end-indent="0pt"/>
这是这种情况下的日志输出：
[java] SEVERE: javax.xml.transform.TransformerException: file:/scratch/publishing/hudson/jobs/build-main-endeca-documentation/workspace/serverdoc/WorkingDoc/main/publishing/build-files/../output/fo/Gloss/EndecaGloss/EndecaGloss-fo.xml:11:10410: "fo:flow" is missing child elements. Required content model: marker* (%block;)+ (See position 11:10410)
[java] Oct 16, 2014 1:30:10 PM org.apache.fop.cli.Main startFOP
对于上下文，在-fo.xml文件中，它位于此天线室的末尾，我认为它正在尝试为PDF设置页眉/页脚：
<fo:page-sequence xmlns:axf="http://www.antennahouse.com/names/XSL/Extensions"
xmlns:fo="somenamespace"
hyphenate="false" master-reference="lot" language="en" format="i"
initial-page-number="auto-odd"
force-page-count="end-on-even" hyphenation-character="-"
hyphenation-push-character-count="2" hyphenation-remain-character-count="2">
<fo:static-content flow-name="xsl-region-before-first">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-bottom-width="1pt" border-bottom-style="solid" border-bottom-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(0)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/></fo:block></fo:table-cell>
<fo:table-cell text-align="center" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/></fo:block></fo:table-cell>
<fo:table-cell text-align="right" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-before-odd">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-bottom-width="1pt" border-bottom-style="solid" border-bottom-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(0)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="right" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-before-even">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-bottom-width="1pt" border-bottom-style="solid" border-bottom-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="right" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-before-blank">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-bottom-width="1pt" border-bottom-style="solid" border-bottom-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="right" display-align="before" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-footnote-separator">
<fo:block>
<fo:leader color="black" leader-pattern="rule" leader-length="1in"/>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-after-first">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-top-width="1pt" border-top-style="solid" border-top-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(3)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"> Oracle Commerce Guided Search Glossary Version 11.1 • July 2014
</fo:block>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="end" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook">
<fo:page-number/>
</fo:block>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-after-odd">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-top-width="1pt" border-top-style="solid" border-top-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(3)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(1)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"> Oracle Commerce Guided Search Glossary Version 11.1 • July 2014
</fo:block>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="end" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook">
<fo:page-number/>
</fo:block>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-after-even">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-top-width="1pt" border-top-style="solid" border-top-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(3)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook">
<fo:page-number/>
</fo:block>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="end" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"> Oracle Commerce Guided Search Glossary Version 11.1 • July 2014
</fo:block>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:static-content flow-name="xsl-region-after-blank">
<fo:block font-family="Myriad-Roman,Symbol,ZapfDingbats" margin-left="0pt" font-weight="bold">
<fo:table table-layout="fixed" width="100%" border-top-width="1pt" border-top-style="solid" border-top-color="black">
<fo:table-column column-number="1" column-width="proportional-column-width(1)"/>
<fo:table-column column-number="2" column-width="proportional-column-width(0)"/>
<fo:table-column column-number="3" column-width="proportional-column-width(3)"/>
<fo:table-body>
<fo:table-row block-progression-dimension.minimum="14pt">
<fo:table-cell text-align="start" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook">
<fo:page-number/>
</fo:block>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="center" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"/>
</fo:block>
</fo:table-cell>
<fo:table-cell text-align="end" display-align="after" relative-align="baseline">
<fo:block>
<fo:block xmlns:d="http://docbook.org/ns/docbook"> Oracle Commerce Guided Search Glossary Version 11.1 • July 2014
</fo:block>
</fo:block>
</fo:table-cell>
</fo:table-row>
</fo:table-body>
</fo:table>
</fo:block>
</fo:static-content>
<fo:flow flow-name="xsl-region-body" start-indent="4pc" end-indent="0pt"/>
</fo:page-sequence>
有没有人知道这里发生了什么？
答案 0 :(得分：2)
错误消息marker* (%block;)+表明flow元素需要一些块内容，而在您的示例中元素为空。
答案 1 :(得分：1)
嗯，你说错误是这样的：
<fo:flow flow-name="xsl-region-body" start-indent="4pc" end-indent="0pt"/>
肯定会是。这是空元素，里面没有任何内容。流的内容模型需要内部的东西，这是一个错误。所以你基本上有一个没有内容的页面。