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[英]How do I select a particular node or element in an XML with XSLT transformations?
[英]using xslt how do i address this particular element in an xml file?
以前从来没有为XML编码过,完全被各种入门知识所迷惑,这些入门知识告诉我要做不同的事情。 这可能意味着您可以采用不同的方式来执行此操作,但是它们都显示单节点情况,而事实并非如此。
我尝试了各种方法来挑选WebDisplayPeriod,但是我坚信我实际上并没有针对该权利的属性。 希望有人能帮助我朝正确的方向发展。 同样,由于w3schools是垃圾,因此任何有关XSLT更高级使用的可读入门知识都将受到赞赏;)。
我有以下xml
<?xml version="1.0" encoding="UTF-8"?>
<nr:RTPPMDataMsgV1 owner="Network Rail" timestamp="2010-08-05T10:27:04.0Z" classification="public" xsi:schemaLocation="http://xml.networkrail.co.uk/ns/2007/NR rtppm_messaging_v1.17.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:msg="http://xml.networkrail.co.uk/ns/2007/EAI" xmlns:nr="http://xml.networkrail.co.uk/ns/2007/NR">
<msg:Sender application="RTPPM3" organisation="String"/>
<msg:Publication>
<msg:TopicID>RTPPM3/InternalPPM</msg:TopicID>
</msg:Publication>
<nr:RTPPMData snapshotTStamp="2010-08-05T10:27:02.0Z">
<nr:SystemMsg/>
<nr:RAGThresholds type="TOC" medium="87" good="92"/>
<nr:RAGThresholds type="FOC" medium="70" good="80"/>
<nr:RAGThresholds type="PPT" medium="85" good="91"/>
<nr:WebPPMLink>http://connect/Performance/PPM/PPMGuide.doc x</nr:WebPPMLink>
<nr:PPT rag="G" ragDisplayFlag="Y">93</nr:PPT>
<nr:NationalPage WebDisplayPeriod="60">
<nr:WebFixedMsg1>^<5 mins; *<10 mins</nr:WebFixedMsg1>
<nr:WebFixedMsg2>The Public Performance Measure shows the performance of trains against the timetable, measured as the percentage of trains arriving at destination 'on time'. </nr:WebFixedMsg2>
<nr:WebMsgOfMoment>EC: 1S02 train defect at Balne.</nr:WebMsgOfMoment>
<nr:StaleFlag>N</nr:StaleFlag>
<nr:NationalPPM>
<nr:Total>5079</nr:Total>
<nr:OnTime>4842</nr:OnTime>
<nr:Late>237</nr:Late>
<nr:CancelVeryLate>47</nr:CancelVeryLate>
<nr:PPM rag="G" ragDisplayFlag="N">95</nr:PPM>
<nr:RollingPPM trendInd="-" rag="G">94</nr:RollingPPM>
</nr:NationalPPM>
......
它会一直持续下去。 但是即时通讯感兴趣的是上面的部分。
我正在使用以下XSLT将其变成清晰的网页:
<?xml version="1.0" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format" xsi:schemaLocation="http://xml.networkrail.co.uk/ns/2007/NR rtppm_messaging_v1.6.xsd" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:msg="http://xml.networkrail.co.uk/ns/2007/EAI" xmlns:nr="http://xml.networkrail.co.uk/ns/2007/NR" >
<xsl:output method="html" omit-xml-declaration="yes" indent="yes" />
<xsl:param name="mode">TOCPage</xsl:param>
<xsl:param name="location">internal-connect</xsl:param>
<xsl:param name="table1Count">11</xsl:param>
<xsl:param name="table2Count">23</xsl:param>
<!-- Root template-->
<xsl:template match="/nr:RTPPMDataMsgV1/nr:RTPPMData">
<xsl:element name="{nr:NationalPage}">
<xsl:attribute name="{WebDisplayPeriod}" >
<xsl:value-of select="."/>
</xsl:attribute>
</xsl:element>
<html>
<head>
<meta http-equiv="content-type" CONTENT="text/css" />
<meta http-equiv="expires" CONTENT="-1" />
<meta http-equiv="pragma" CONTENT="no-cache" />
<meta http-equiv="cache-control" CONTENT="no-cache" />
<meta http-equiv="refresh" name="refresh" content="{$WebDisplayPeriod}" />
<title>EC RTPPM Feed</title>
<link rel="stylesheet" type="text/css" href="stylesheet.css" />
<link rel="stylesheet" type="text/css" href="xslstylesheet.css" />
</head>
<body>
<p>Hello</p>
<p>Hello</p>
</body>
</html>
</xsl:template >
</xsl:stylesheet>
就像您猜到的那样,它永远不会占用WebDisplayPeriod。
尝试这样的事情:
<xsl:template match="/nr:RTPPMDataMsgV1/nr:RTPPMData">
<xsl:variable name="WebDisplayPeriod" select="./nr:NationalPage/@WebDisplayPeriod" />
<html>
<head>
<meta http-equiv="content-type" CONTENT="text/css" />
<meta http-equiv="expires" CONTENT="-1" />
<meta http-equiv="pragma" CONTENT="no-cache" />
<meta http-equiv="cache-control" CONTENT="no-cache" />
<meta http-equiv="refresh" name="refresh" content="{$WebDisplayPeriod}" />
<title>EC RTPPM Feed</title>
<link rel="stylesheet" type="text/css" href="stylesheet.css" />
<link rel="stylesheet" type="text/css" href="xslstylesheet.css" />
</head>
<body>
<p>Hello</p>
<p>Hello</p>
</body>
</html>
</xsl:template >
简短而明确的答案是,您需要指定attribute
轴(或简称@
)来访问属性,例如:
/nr:RTPPMDataMsgV1/nr:RTPPMData/nr:NationalPage/@WebDisplayPeriod
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