XQuery 嵌套 For 循环

我有一个示例 xml 文件，例如：

<user_manual document-type="IU" ts-cover="Language Part alt" ts-lang="-" ts-multi="Language Part, Chapter" ts-overview="-" metadata1="9211" brand="Bosch" material-number="dummy_9000727237" vib="RW404960" language-codes="de, en" production-date="2012-12-03" layout-type="-" id="SL9761901">
<embed-language_part id="SL14686180">
<language_part id="ecls_bio_becls_a3_a14686169.SL9761756.7" role="-" lang="de">
<embed-user_manual_part id="ecls_bio_becls_a3_a14686169.SL14686446.10">
<?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a17144756"?> 
<user_manual_part id="ecls_bio_becls_a3_a17144756.SL9765760.11" role="-" document-type="IU">
<embed-chapter id="ecls_bio_becls_a3_a17144756.SL9762101.13">
<?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a30660983"?> 
<chapter id="ecls_bio_becls_a3_a30660983.SL2300626.14" role="-" toctitle="yes" footrowtitle="no" type="security">
<embed-title_module id="ecls_bio_becls_a3_a30660983.SL2361816.15">
<?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a611713"?> 
<title_module id="ecls_bio_becls_a3_a611713.SL873735.16" role="-">
<title id="ecls_bio_becls_a3_a611713.SL873736.17">Sicherheits- und Warnhinweise</title> 
</title_module>
<?ecls-end-embedded-resource resource="ecls_bio_becls_a3_a611713"?> 
</embed-title_module>
<embed-section id="ecls_bio_becls_a3_a30660983.SL10400094.18">
<?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a11752692"?>  
<section id="ecls_bio_becls_a3_a11752692.SL1742298.19" footrowtitle="no" role="-" toctitle="yes">
<?Pub Caret1?> 
<embed-title_module id="ecls_bio_becls_a3_a11752692.SL1742291.20">
<?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a16181733"?> 
<title_module id="ecls_bio_becls_a3_a16181733.SL984238.21" role="-">
<title id="ecls_bio_becls_a3_a16181733.SL984239.22">Bevor Sie das Gerat in Betrieb nehmen</title> 
<para id="ecls_bio_becls_a3_a16181733.SL984240.23">Lesen Sie Gebrauchs- und Montageanleitung aufmerksam durch! Sie enthalten wichtige Informationen �ber Aufstellen, Gebrauch und Wartung des Ger�tes.</para> 
<para id="ecls_bio_becls_a3_a16181733.SL984241.24">Der Hersteller haftet nicht, wenn Sie die Hinweise und Warnungen der Gebrauchsanleitung missachten. Bewahren Sie alle Unterlagen f�r sp�teren Gebrauch oder f�r Nachbesitzer auf.</para> 
</title_module>
<?ecls-end-embedded-resource resource="ecls_bio_becls_a3_a16181733"?> 
</embed-title_module>
</section>
<?Pub *0000000275?> 
<?ecls-end-embedded-resource resource="ecls_bio_becls_a3_a11752692"?> 
</embed-section>
</chapter>
</embed-chapter>
</user_manual_part>
</embed-user_manual_part>
</language_part>
</embed-language_part>
</user_manual>

我想使用 XQuery 语言，但我对这种查询语言很陌生。

我需要的基础设施是这样的：我想获取章节及其章节及其标题，例如：

该章节类似于此 xml 文件：

    <chapter id="ecls_bio_becls_a3_a30660983.SL2300626.14" role="-" toctitle="yes" footrowtitle="no" type="security">
    <embed-title_module id="ecls_bio_becls_a3_a30660983.SL2361816.15">
    <?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a611713"?> 
    <title_module id="ecls_bio_becls_a3_a611713.SL873735.16" role="-">
    <title id="ecls_bio_becls_a3_a611713.SL873736.17">Sicherheits- und Warnhinweise</title>
...

在该示例中，Sicherheits-ind Warnhinweise 是章节元素的标题。章节可以有许多部分，在我们的示例中，部分的标题是：

       <section id="ecls_bio_becls_a3_a11752692.SL1742298.19" footrowtitle="no" role="-" toctitle="yes">
        <?Pub Caret1?> 
        <embed-title_module id="ecls_bio_becls_a3_a11752692.SL1742291.20">
        <?ecls-start-embedded-resource resource="ecls_bio_becls_a3_a16181733"?> 
        <title_module id="ecls_bio_becls_a3_a16181733.SL984238.21" role="-">
        <title id="ecls_bio_becls_a3_a16181733.SL984239.22">Bevor Sie das Gerat in Betrieb nehmen</title> 
...

Bevor Sie das Gerät in Betrieb nehmen。

预期结构：

<chapter> title:"Chapter's title"
<section>title:"First section's title"</section>
<section>title:"Second section's title"</section>
</chapter>

对于该示例章节只有一个部分，但我只是配置了这个部分来达到我的文件的解决方案，我想这是最可读的配置......

我尝试了下面的 xquery 查询：

<chapter
    let $doc := doc("Test.xml")
    for $chapter in $doc/user_manual/embed-language_part/language_part/embed-user_manual_part/user_manual_part/embed-chapter/chapter
        let $chapter_title := $chapter/embed-title_module/title_module/title
        for $section in $chapter/embed-section/section
        return <chapter>title:{data($chapter_title)} <section> title:{data($section/embed-title_module/title_module/title)}</section></chapter>

有两个嵌套循环，但这段代码使我的结构如下：

<chapter>title:"Chapter's title"<section>"First section's title"</section></chapter>
<chapter>title:"Chapter's title"<section>"Second section's title"</section></chapter>

问题是循环，但是当我尝试编辑这样的代码时：

let $doc := doc("assemble.xml")
    for $chapter in $doc/user_manual/embed-language_part/language_part/embed-user_manual_part/user_manual_part/embed-chapter/chapter
        let $chapter_title := $chapter/embed-title_module/title_module/title
        <chapter> title:{data($chapter_title)} {
        for $section in $chapter/embed-section/section
        return <section> title:{data($section/embed-title_module/title_module/title)}</section>
        }</chapter>

我只想将标签放在第一个循环中，之后我将添加部分元素进行查询。但上面的命令并没有达到我的预期。

所以我需要你的建议来正确地获得这些结构。先感谢您。我希望我能清楚地告诉大家情况。文件名称假定为“assemble.xml”。

<chapters>{
let $doc := doc("assemble.xml")
for $chapter in $doc/user_manual/embed-language_part/language_part/embed-user_manual_part/user_manual_part/embed-chapter/chapter
return
    <chapter>
    title:{data($chapter/embed-title_module/title_module/title)}
        {
            for $section in $chapter/embed-section/section
                return <section>title: {data($section/embed-title_module/title_module/title)}</section>
        }
    </chapter>
}</chapters>

我在互联网上搜索，找到了如何进行内循环操作。下面的代码完全符合我的期望。