Xml XSLT-使用正则表达式和字符串长度查找属性值

输入XML就像

<link idref="c001_r1" target="page">1</link>
<link idref="r164">2004</link>
<link idref="ref1">Austen et al. 1975</link>

产出应该是,

<link idref="c001_r1" target="literature"><sup>1</sup></link>
<link idref="r164" target="literature">2004</link>
<link idref="ref1" target="literature">Austen et al. 1975</link>

我们编写了xslt，如下所示

 <xsl:template match="link">
    <xsl:choose>            
         <xsl:when test="starts-with(@idref, 'r') and string-length(.) = 4">
             <xsl:copy>
                <xsl:apply-templates select="@*"/>
            <xsl:attribute name="target">
                <xsl:value-of select="'literature'" />
            </xsl:attribute>
                 <xsl:apply-templates select="node()"/>
             </xsl:copy>
        </xsl:when>
        <xsl:when test="starts-with(@idref, 'ref') and string-length(.) > 4">
            <xsl:copy>
                <xsl:apply-templates select="@*"/>
                <xsl:attribute name="target">
                    <xsl:value-of select="'literature'" />
                </xsl:attribute>
                <xsl:apply-templates select="node()"/>
            </xsl:copy>
        </xsl:when>
        <xsl:when test="contains(@idref, '(.+)_r')">
            <xsl:copy>
                <xsl:apply-templates select="@*"/>
                <xsl:attribute name="target">
                    <xsl:value-of select="'literature'" />
                </xsl:attribute>
                <sup>
                    <xsl:apply-templates select="node()"/></sup>
            </xsl:copy>
        </xsl:when>
       <xsl:when test="starts-with(@idref, 'ref') and string-length(.) < 3">
            <xsl:copy>
                <xsl:apply-templates select="@*"/>
                <xsl:attribute name="target">
                    <xsl:value-of select="'literature'" />
                </xsl:attribute>
                <sup>
                <xsl:apply-templates select="node()"/>
                </sup>
            </xsl:copy>
        </xsl:when>
        <xsl:otherwise>
            <xsl:copy>
                <xsl:apply-templates select="@*"/> 
                <xsl:attribute name="target"><xsl:text>page</xsl:text>                        
                </xsl:attribute>
                <xsl:apply-templates select="node()"/>
                </xsl:copy>
        </xsl:otherwise>
    </xsl:choose>        
</xsl:template>

---

使用上述xslt时，第3和第4个条件不起作用。我们需要根据属性值和字符串长度添加属性。我们不能少提而不是说它不起作用，你应该真正提到你所遇到的任何错误。感谢您的宝贵回复，并进一步澄清。这真的很有帮助。

<xsl:when test="starts-with(@idref, 'ref') and string-length(.) &lt; 3">

<xsl:when test="starts-with(@idref, 'ref') and string-length(.) lt 3">

<xsl:when test="matches(@idref, '.+_r.+')">

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
    <xsl:output method="xml" indent="yes" />

    <xsl:template match="@*|node()">
        <xsl:copy>
            <xsl:apply-templates select="@*|node()"/>
        </xsl:copy>
    </xsl:template>

     <xsl:template match="link">
        <xsl:copy>
           <xsl:apply-templates select="@*"/>
           <xsl:if test="(starts-with(@idref, 'r') and string-length(.) = 4)
                         or (starts-with(@idref, 'ref') and string-length(.) > 4)
                         or (matches(@idref, '.+_r.+'))
                         or (starts-with(@idref, 'ref') and string-length(.) lt 3)">
                <xsl:attribute name="target" select="'literature'" />
            </xsl:if>
            <xsl:apply-templates />
         </xsl:copy>
    </xsl:template>
</xsl:stylesheet>