I use xmlstarlet el -v显示 xml 文件的结构，包括所有属性和值。我想将其输出转换为某种键值对，即每个属性及其值位于单独的行上（包括 XPath）；每行必须是唯一的。
<?xml version=1.0 encoding=UTF-8?>
<topRoot>
<topSystem>
<commSvcEp>
<commSyslog descr="Syslog Service" name="syslog" policyOwner="local" severity="critical">
<commSyslogClient adminState="disabled" forwardingFacility="local7" hostname="none" name="secondary" severity="critical"></commSyslogClient>
<commSyslogClient adminState="disabled" forwardingFacility="local7" hostname="none" name="tertiary" severity="critical"></commSyslogClient>
<commSyslogClient adminState="disabled" forwardingFacility="local7" hostname="none" name="primary" severity="critical"></commSyslogClient>
</commSyslog>
</commSvcEp>
</topSystem>
</topRoot>
当前结果：
topRoot/topSystem/commSvcEp/commSyslog[@descr='Syslog Service' and @name='syslog' and @policyOwner='local' and @severity='critical']
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[@adminState='disabled' and @forwardingFacility='local7' and @hostname='none' and @name='secondary' and @severity='critical']
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[@adminState='disabled' and @forwardingFacility='local7' and @hostname='none' and @name='tertiary' and @severity='critical']
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[@adminState='disabled' and @forwardingFacility='local7' and @hostname='none' and @name='primary' and @severity='critical']
期望的结果（可能是任何类似的结果；索引只是一个想法）：
topRoot/topSystem/commSvcEp/commSyslog@descr='Syslog Service'
topRoot/topSystem/commSvcEp/commSyslog@name='syslog'
topRoot/topSystem/commSvcEp/commSyslog@policyOwner='local'
topRoot/topSystem/commSvcEp/commSyslog@severity='critical'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[0]@adminState='disabled'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[0]@forwardingFacility='local7'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[0]@hostname='none'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[0]@name='secondary'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[0]@severity='critical'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[1]@adminState='disabled'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[1]@forwardingFacility='local7'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[1]@hostname='none'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[1]@name='tertiary'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[1]@severity='critical'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[2]@adminState='disabled'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[2]@forwardingFacility='local7'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[2]@hostname='none'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[2]@name='primary'
topRoot/topSystem/commSvcEp/commSyslog/commSyslogClient[2]@severity='critical'
我想要实现的目标是能够跑步diff超过两个这样的文件或使用grep过滤匹配模式。我确信有一种方法可以创建这样的输出，而不使用sed, awk或除此之外的其他任何东西xmlstarlet itself.
对于 xmlstarlet 和整个 xml 世界，我几乎是一个新手（不仅仅是因为我不喜欢 xml，因为它的复杂性和解析开销等），所以我非常感谢您的帮助。谢谢！
既然你已经在使用xmlstarlet，您也可以使用 XSLT。
XSLT 1.0（可以通过使用 xmlstarlet 来运行tr命令）
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output method="text"/>
<xsl:strip-space elements="*"/>
<xsl:param name="sep" select="'.'"/>
<xsl:template match="text()"/>
<xsl:template match="*">
<xsl:variable name="path">
<xsl:for-each select="ancestor-or-self::*">
<xsl:variable name="predicate">
<xsl:call-template name="genPredicate"/>
</xsl:variable>
<xsl:if test="ancestor::*">
<xsl:value-of select="$sep"/>
</xsl:if>
<xsl:value-of select="concat(local-name(),$predicate)"/>
</xsl:for-each>
</xsl:variable>
<xsl:for-each select="@*">
<xsl:value-of select="concat($path,$sep,name(),'=',.)"/>
<xsl:text>
</xsl:text>
</xsl:for-each>
<xsl:if test="not(@*)">
<xsl:text>
</xsl:text>
</xsl:if>
<xsl:apply-templates select="node()"/>
</xsl:template>
<xsl:template name="genPredicate">
<xsl:if test="preceding-sibling::*[local-name()=local-name(current())] or following-sibling::*[local-name()=local-name(current())]">
<xsl:value-of select="concat('[',count(preceding-sibling::*[local-name()=local-name(current())])+1,']')"/>
</xsl:if>
</xsl:template>
</xsl:stylesheet>
注意：有一个参数名为sep所以你可以从命令行更改分隔符（使用-p sep="/"或任何你想要的分隔符）。当前设置为您首选的“.”。
Output
commSyslog.descr=Syslog Service
commSyslog.name=syslog
commSyslog.policyOwner=local
commSyslog.severity=critical
commSyslog.commSyslogClient[1].adminState=disabled
commSyslog.commSyslogClient[1].forwardingFacility=local7
commSyslog.commSyslogClient[1].hostname=none
commSyslog.commSyslogClient[1].name=secondary
commSyslog.commSyslogClient[1].severity=critical
commSyslog.commSyslogClient[2].adminState=disabled
commSyslog.commSyslogClient[2].forwardingFacility=local7
commSyslog.commSyslogClient[2].hostname=none
commSyslog.commSyslogClient[2].name=tertiary
commSyslog.commSyslogClient[2].severity=critical
commSyslog.commSyslogClient[3].adminState=disabled
commSyslog.commSyslogClient[3].forwardingFacility=local7
commSyslog.commSyslogClient[3].hostname=none
commSyslog.commSyslogClient[3].name=primary
commSyslog.commSyslogClient[3].severity=critical
commSyslog.commSyslogMonitor.adminState=disabled
commSyslog.commSyslogMonitor.descr=
commSyslog.commSyslogMonitor.name=
commSyslog.commSyslogMonitor.severity=critical
commSyslog.commSyslogConsole.adminState=disabled
commSyslog.commSyslogConsole.descr=
commSyslog.commSyslogConsole.name=
commSyslog.commSyslogConsole.severity=critical
commSyslog.commSyslogSource.audits=disabled
commSyslog.commSyslogSource.descr=
commSyslog.commSyslogSource.events=disabled
commSyslog.commSyslogSource.faults=enabled
commSyslog.commSyslogSource.name=
commSyslog.commSyslogFile.adminState=enabled
commSyslog.commSyslogFile.descr=
commSyslog.commSyslogFile.name=messages
commSyslog.commSyslogFile.severity=critical
commSyslog.commSyslogFile.size=4194304
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