在转换过程中删除没有属性、子元素或文本的元素

XSL很难。我的问题的答案 here 让我基本上走上了正轨,但有一些小事情我最初忽略了。这是我的最新尝试:

XSL:

<!--
    When a file is transformed using this stylesheet the output will be
    formatted as follows:

    1.)  Elements named "info" will be removed
    2.)  Attributes named "file_line_nr" or "file_name" will be removed
    3.)  Comments will be removed
    4.)  Processing instructions will be removed
    5.)  XML declaration will be removed
    6.)  Extra whitespace will be removed
    7.)  Empty attributes will be removed
    8.)  Elements void of both attributes and child elements will be removed
    9.)  All elements will be sorted by name recursively
    10.) All attributes will be sorted by name
-->
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
    <xsl:output indent="yes" method="xml" omit-xml-declaration="yes"/>
    <xsl:strip-space elements="*"/>

    <!--
        Elements/attributes to remove.  Note that comments are not elements or
        attributes.  Since there is no template to match comments they are
        automatically ignored.
    -->
    <xsl:template match="@*[normalize-space()='']|info|@file_line_nr|@file_name"/>

    <!-- Match any attribute -->
    <xsl:template match="@*">
        <xsl:copy>
            <xsl:apply-templates select="@*"/>
        </xsl:copy>
    </xsl:template>

    <!-- Match any element -->
    <xsl:template match="*">
        <xsl:copy>
            <xsl:apply-templates select="@*">
                <xsl:sort select="name()"/>
            </xsl:apply-templates>
            <xsl:apply-templates>
                <xsl:sort select="name()"/>
            </xsl:apply-templates>
        </xsl:copy>
    </xsl:template>

</xsl:stylesheet>

我想我已经满足了除第8项外的所有要求。我可以成功地制作一个样式表,删除没有子元素的元素,或者删除没有属性的元素,但这不是我想要的。我只想删除没有属性、子元素或文本的元素。

输入XML:

<?xml version="1.0" encoding="UTF-8" standalone="no" ?><!-- XML declaration should be removed -->
<foo b="b" a="a" c="c">
    <?some-app inst="some instruction"?><!-- Processing instructions should be removed -->
    <qwer><!-- Keep elements like this because it has child elements -->
        <zxcv c="c" b="b"/><!-- Keep elements like this because it has attributes -->
        <id>some text</id><!-- Keep elements like this because it has text -->
        <info i="i"/><!-- Elements named "info" are to be removed -->
        <rewq file_line_nr="42" file_name="somefile.txt"/><!-- Attributes named "file_line_nr" and "file_name" are to be removed which will leave this element empty, so it should be removed too -->
        <vcxz c="c" b="b"/>
    </qwer>
    <baz e="e" d="d"/>
    <bar>
        <fdsa g="g" f="f"/>
        <asdf g="g" f="f"/>
    </bar>
</foo>

所需的输出XML: (没有注释,没有空格/缩进,元素和属性已排序)

<foo a="a" b="b" c="c">
<bar>
<asdf f="f" g="g"/>
<fdsa f="f" g="g"/>
</bar>
<baz d="d" e="e"/>
<qwer>
<id>some text</id>
<vcxz b="b" c="c"/>
<zxcv b="b" c="c"/>
</qwer>
</foo>