Does the name of the xsl:template effects the result of function fn:key，and why？ thanks a lot

问题

I find a appearance , that I can't get a correct result with fn:key function in a template which has a name attribute. When I just delete the name attribute of xsl:template, the result are right. That amazes me. Would somebody like to tell the reason? thanks.

<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"

xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
xmlns:rel="http://schemas.openxmlformats.org/package/2006/relationships"
xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
xmlns:v="urn:schemas-microsoft-com:vml"

xmlns:map = "http://www.w3.org/2005/xpath-functions/map"
exclude-result-prefixes="xs w rel r map"
version="2.0">

<xsl:key name="key_styles_id" match="w:style" use="@w:styleId"/>

<xsl:template match="/">
    <xsl:variable name="styles" select="doc(resolve-uri('styles.xml',    document-uri(/)))" as="document-node()?"/>

    <xsl:apply-templates select="w:document/w:body/w:p">
        <xsl:with-param name="styles" tunnel="yes" select="$styles"/>
    </xsl:apply-templates>        
</xsl:template>

<xsl:template name="all_paragraph" match="w:p">
    <xsl:param name="styles" tunnel="yes" required="yes" />

    <xsl:value-of select="$styles"/>

    <xsl:variable name="style_id" select="w:pPr/w:pStyle/@w:val" as="xs:string?"/>
    <xsl:variable name="style_node" select="key('key_styles_id', $style_id, $styles)"/>
    <xsl:value-of select="$style_node"/>
</xsl:template>  

</xsl:stylesheet>

The input xml is the documment.xml in directory of a unzip docx, the docx file can be replaced to a file that have some words with styles.

The problem is that: If I delete the name attribute whose value is 'all_paragraph', the key function will get the right result and $style_node has many elements data. if not , the key function return empty and $style_node has nothing.

The xslt processor that I use is saxon-he 9.8.0.12

input source: document.xml

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<w:document xmlns:o="urn:schemas-microsoft-com:office:office"
    xmlns:r="http://schemas.openxmlformats.org/officeDocument/2006/relationships"
    xmlns:v="urn:schemas-microsoft-com:vml"
    xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
    xmlns:w10="urn:schemas-microsoft-com:office:word"
    xmlns:wp="http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing"
    xmlns:wps="http://schemas.microsoft.com/office/word/2010/wordprocessingShape"
    xmlns:wpg="http://schemas.microsoft.com/office/word/2010/wordprocessingGroup"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
    xmlns:wp14="http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing"
    xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml" mc:Ignorable="w14 wp14">
    <w:body>
        <w:p>
            <w:pPr>
                <w:pStyle w:val="Normal"/>
                <w:rPr>
                    <w:b/>
                    <w:b/>
                    <w:bCs/>
                    <w:color w:val="C9211E"/>
                </w:rPr>
            </w:pPr>
            <w:r>
                <w:rPr>
                    <w:b/>
                    <w:bCs/>
                    <w:color w:val="C9211E"/>
                </w:rPr>
                <w:t xml:space="preserve">12345good day. </w:t>
            </w:r>
        </w:p>
        <w:p>
            <w:pPr>
                <w:pStyle w:val="Normal"/>
                <w:rPr>
                    <w:i/>
                    <w:i/>
                    <w:iCs/>
                    <w:color w:val="77BC65"/>
                    <w:sz w:val="28"/>
                    <w:szCs w:val="28"/>
                    <w:highlight w:val="yellow"/>
                </w:rPr>
            </w:pPr>
            <w:r>
                <w:rPr>
                    <w:i/>
                    <w:iCs/>
                    <w:color w:val="77BC65"/>
                    <w:sz w:val="28"/>
                    <w:szCs w:val="28"/>
                    <w:highlight w:val="yellow"/>
                </w:rPr>
                <w:t>64789hello world</w:t>
            </w:r>
        </w:p>
        <w:sectPr>
            <w:type w:val="nextPage"/>
            <w:pgSz w:w="11906" w:h="16838"/>
            <w:pgMar w:left="1134" w:right="1134" w:header="0" w:top="1134" w:footer="0"
                w:bottom="1134" w:gutter="0"/>
            <w:pgNumType w:fmt="decimal"/>
            <w:formProt w:val="false"/>
            <w:textDirection w:val="lrTb"/>
        </w:sectPr>
    </w:body>
</w:document>

styles.xml which used in xslt code like doc('styles.xml')

    <?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<w:styles xmlns:w="http://schemas.openxmlformats.org/wordprocessingml/2006/main"
    xmlns:w14="http://schemas.microsoft.com/office/word/2010/wordml"
    xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" mc:Ignorable="w14">
    <w:docDefaults>
        <w:rPrDefault>
            <w:rPr>
                <w:rFonts w:ascii="Liberation Serif" w:hAnsi="Liberation Serif" w:eastAsia="新宋体"
                    w:cs="Lucida Sans"/>
                <w:kern w:val="2"/>
                <w:sz w:val="24"/>
                <w:szCs w:val="24"/>
                <w:lang w:val="en-US" w:eastAsia="zh-CN" w:bidi="hi-IN"/>
            </w:rPr>
        </w:rPrDefault>
        <w:pPrDefault>
            <w:pPr>
                <w:widowControl/>
            </w:pPr>
        </w:pPrDefault>
    </w:docDefaults>
    <w:style w:type="paragraph" w:styleId="Normal">
        <w:name w:val="Normal"/>
        <w:qFormat/>
        <w:pPr>
            <w:widowControl/>
        </w:pPr>
        <w:rPr>
            <w:rFonts w:ascii="Liberation Serif" w:hAnsi="Liberation Serif" w:eastAsia="新宋体"
                w:cs="Lucida Sans"/>
            <w:color w:val="auto"/>
            <w:kern w:val="2"/>
            <w:sz w:val="24"/>
            <w:szCs w:val="24"/>
            <w:lang w:val="en-US" w:eastAsia="zh-CN" w:bidi="hi-IN"/>
        </w:rPr>
    </w:style>
    <w:style w:type="paragraph" w:styleId="Style14">
        <w:name w:val="标题样式"/>
        <w:basedOn w:val="Normal"/>
        <w:next w:val="Style15"/>
        <w:qFormat/>
        <w:pPr>
            <w:keepNext w:val="true"/>
            <w:spacing w:before="240" w:after="120"/>
        </w:pPr>
        <w:rPr>
            <w:rFonts w:ascii="Liberation Sans" w:hAnsi="Liberation Sans" w:eastAsia="微软雅黑"
                w:cs="Lucida Sans"/>
            <w:sz w:val="28"/>
            <w:szCs w:val="28"/>
        </w:rPr>
    </w:style>
    <w:style w:type="paragraph" w:styleId="Style15">
        <w:name w:val="Body Text"/>
        <w:basedOn w:val="Normal"/>
        <w:pPr>
            <w:spacing w:lineRule="auto" w:line="276" w:before="0" w:after="140"/>
        </w:pPr>
        <w:rPr/>
    </w:style>
    <w:style w:type="paragraph" w:styleId="Style16">
        <w:name w:val="List"/>
        <w:basedOn w:val="Style15"/>
        <w:pPr/>
        <w:rPr>
            <w:rFonts w:cs="Lucida Sans"/>
        </w:rPr>
    </w:style>
    <w:style w:type="paragraph" w:styleId="Style17">
        <w:name w:val="Caption"/>
        <w:basedOn w:val="Normal"/>
        <w:qFormat/>
        <w:pPr>
            <w:suppressLineNumbers/>
            <w:spacing w:before="120" w:after="120"/>
        </w:pPr>
        <w:rPr>
            <w:rFonts w:cs="Lucida Sans"/>
            <w:i/>
            <w:iCs/>
            <w:sz w:val="24"/>
            <w:szCs w:val="24"/>
        </w:rPr>
    </w:style>
    <w:style w:type="paragraph" w:styleId="Style18">
        <w:name w:val="索引"/>
        <w:basedOn w:val="Normal"/>
        <w:qFormat/>
        <w:pPr>
            <w:suppressLineNumbers/>
        </w:pPr>
        <w:rPr>
            <w:rFonts w:cs="Lucida Sans"/>
        </w:rPr>
    </w:style>
</w:styles>

my screenshots:

first result with name attribute

2nd result without name attribute

来源：https://stackoverflow.com/questions/59151172/does-the-name-of-the-xsltemplate-effects-the-result-of-function-fnkey-and-why