我是XML和XSL的新手，我似乎一直在盘旋这个问题而且我找不到符合我需求的解决方案。
我有一个以正确的格式和布局显示我的XML数据的XSL。我的问题是，基于CrossSectionSegment部分下缺少的“斜率”字段，我希望XSL忽略某些重复的部分。
我的XML数据的剪辑，其中1个点带有“斜率”字段，1个没有（成千上万个）：
<?xml version="1.0" encoding="iso-8859-1"?>
<InRoads productName="Power InRoads V8i (SELECTseries 2)" productVersion="08.11.07.615" outputGridScaleFactor="1.000000" inputGridScaleFactor="1.000000" linearUnits="Metric" angularUnits="Degrees" commandName="Cross Section Report">
<CrossSectionSet setID="12" setName="assiginack_1" alignmentOID="{F3AC8C7A-D9A2-44C3-B154-611FA05E38F6}" alignmentName="assiginack">
<CrossSectionStations>
<CrossSectionStation leftOffset="-9.345000" rightOffset="7.683000" tangentialDirection="0.918685" radialDirection="2.489481" northing="5058046.825198" easting="346212.772114" elevation="0.000000" longitudinalGrade="0.000000">
<Station internalStation="10300.000000" externalStationName="" externalStation="10300.000000"/>
<CrossSectionSurfaces>
<CrossSectionSurface name="Assi_Design" type="1">
<CrossSectionPoints>
<CrossSectionPoint type="CrossSectionPoint" northing="5058044.240230" easting="346214.745845" offset="3.252333" elevation="229.294167">
<CrossSectionFeatures>
<CrossSectionFeature name="REP" style="EOP" description="Created by roadway design" aheadLongitudinalSlope="0.038977"/>
</CrossSectionFeatures>
<CrossSectionSegment width="1.687000" height="-0.038567" length="1.687441" slope="-0.022861"/>
</CrossSectionPoint>
<CrossSectionPoint type="CrossSectionPoint" northing="5058044.239700" easting="346214.746249" offset="3.253000" elevation="229.294136">
<CrossSectionFeatures>
<CrossSectionFeature name="REP" style="EOP" description="Created by roadway design" aheadLongitudinalSlope="0.038977"/>
</CrossSectionFeatures>
<CrossSectionSegment width="0.000667" height="-0.000031" length="0.000667" averageCrossSlopeArea="0.050057"/>
</CrossSectionPoint>
</CrossSectionPoints>
</CrossSectionSurface>
</CrossSectionSurfaces>
</CrossSectionStation>
</CrossSectionStations>
</CrossSectionSet>
</InRoads>
我打算让XML剪辑中的第二个“REP”横截面点被忽略，并保留第一个基于它具有“斜率”字段而第二个没有的事实。或者，相反可能有效，排除具有averageCrossSlopeArea字段的点。 （我还有其他重复的要点，并没有特别称为“REP”）。
这是我交给的XSL并对其进行了一些修改：
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet version="1.1" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:fo="http://www.w3.org/1999/XSL/Format" xmlns:msxsl="urn:schemas-microsoft-com:xslt" xmlns:inr="http://mycompany.com/mynamespace">
<xsl:include href="../format.xsl"/>
<xsl:param name="xslRootDirectory" select="inr:xslRootDirectory"/>
<!-- Unique cross section surfaces -->
<xsl:variable name="uniqueSurfaceName" select="//CrossSectionSurfaces/CrossSectionSurface[not (@name = preceding::CrossSectionSurface/@name)]/@name"/>
<!-- Slope Stake Listing -->
<xsl:template match="/">
<xsl:variable name="gridOut" select="inr:SetGridOut(number(InRoads/@outputGridScaleFactor))"/>
<html>
<head>
<link rel="stylesheet" type="text/css" href="{$xslRootDirectory}/_Themes/engineer/document.css"/>
<!-- Title displayed in browser Title Bar -->
<title lang="en">Slope Stake Listing</title>
</head>
<body>
<xsl:choose>
<xsl:when test="$xslShowHelp = 'true'">
<xsl:call-template name="StyleSheetHelp"/>
</xsl:when>
<xsl:otherwise>
<xsl:for-each select="InRoads">
<center>
<!-- Report Title -->
<h6 lang="en">SLOPE STAKE LISTING</h6>
<p lang="en">
<xsl:value-of select="inr:longDate()"/>  <xsl:value-of select="inr:longTime()"/>
</p>
</center>
<!-- Cross Section Set Data -->
<xsl:for-each select="CrossSectionSet">
<table class="margin">
<tbody>
<tr>
<td lang="en">Set Name:  </td>
<td><xsl:value-of select="@setName"/></td>
</tr>
<tr>
<td lang="en">Project Units:  </td>
<td lang="en">
<xsl:if test="//@linearUnits = 'Imperial'">US Survey Feet</xsl:if>
<xsl:if test="//@linearUnits = 'Metric'">Metric</xsl:if>
</td>
</tr>
<tr>
<td lang="en">Contract No.:  </td>
<td> </td>
</tr>
<tr>
<td lang="en">Co./Rte./PM:  </td>
<td> </td>
</tr>
</tbody>
</table>
<hr/>
<!-- Cross Section Point Data -->
<table class="margin" width="90%">
<xsl:for-each select="$uniqueSurfaceName[../@type = 1]">
<xsl:for-each select="//CrossSectionSurface[@name = current()]">
<xsl:for-each select="CrossSectionPoints">
<!-- Alignment Name -->
<tr>
<th colspan="11" lang="en">
Alignment Chain:  <xsl:value-of select="../../../../../@alignmentName"/>
</th>
</tr>
<!-- Station -->
<tr>
<th colspan="11" lang="en">
Station:  <xsl:value-of select="inr:stationFormat(number(../../../Station/@externalStation), $xslStationFormat,$xslStationPrecision, string(../../../Station/@externalStationName))"/>
</th>
</tr>
<!-- Feature Name -->
<tr>
<xsl:for-each select="CrossSectionPoint[CrossSectionFeatures/CrossSectionFeature/@name] | CrossSectionPoint[not (CrossSectionFeatures/CrossSectionFeature/@name) and (@offset > -0.1 and @offset < 0.1)]">
<th>
<xsl:value-of select="CrossSectionFeatures/CrossSectionFeature/@name"/>
</th>
</xsl:for-each>
</tr>
<!-- Offset -->
<tr>
<xsl:for-each select="CrossSectionPoint[CrossSectionFeatures/CrossSectionFeature/@name] | CrossSectionPoint[not (CrossSectionFeatures/CrossSectionFeature/@name) and (@offset > -0.1 and @offset < 0.1)]">
<td align="center" style="padding-left:5px;padding-right:5px;white-space:nowrap;">
<xsl:value-of select="inr:distanceFormat(number(@offset), $xslDistancePrecision)"/>
</td>
</xsl:for-each>
</tr>
<!-- Elevation -->
<tr>
<xsl:for-each select="CrossSectionPoint[CrossSectionFeatures/CrossSectionFeature/@name] | CrossSectionPoint[@offset > -0.0001 and @offset < 0.0001]">
<td align="center" style="padding-left:5px;padding-right:5px;white-space:nowrap;">
<xsl:value-of select="inr:elevationFormat(number(@elevation), $xslElevationPrecision)"/>
</td>
</xsl:for-each>
</tr>
<!-- Slope -->
<tr>
<xsl:for-each select="CrossSectionPoint[CrossSectionFeatures/CrossSectionFeature/@name] | CrossSectionPoint[not (CrossSectionFeatures/CrossSectionFeature/@name) and (@offset > -0.1 and @offset < 0.1)]">
<td align="center" style="padding-left:5px;padding-right:5px;white-space:nowrap;">
<xsl:value-of select="inr:alternateGradeFormat(number(CrossSectionSegment/@slope), $xslGradeFormat, $xslGradePrecision, $xslIfSlopeExceeds, $xslAlternateSlopeFormat, $xslAlternateSlopePrecision)"/>
</td>
</xsl:for-each>
</tr>
<tr><td> </td></tr>
</xsl:for-each>
</xsl:for-each>
</xsl:for-each>
</table>
</xsl:for-each>
</xsl:for-each>
</xsl:otherwise>
</xsl:choose>
</body>
</html>
</xsl:template>
<msxsl:script implements-prefix="inr" language="JScript">
<![CDATA[
// This function gets the current date.
function longDate()
{
var today = new Date();
var month = today.getMonth();
var monthName = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
var dayOfMonth = today.getDate();
if (dayOfMonth < 10)
{
dayOfMonth = "0" + dayOfMonth;
}
var year = today.getFullYear();
return monthName[today.getMonth()] + " " + dayOfMonth + ", " + year;
}
// This function gets the current time.
function longTime()
{
var today = new Date();
var hours = today.getHours();
var setting = "";
if (hours == 12)
{
setting = "PM";
}
if (hours == 24)
{
setting = "AM";
}
if (hours < 12)
{
setting = "AM";
}
if (hours > 12)
{
setting = "PM";
hours = hours - 12;
}
var minutes = today.getMinutes();
if (minutes < 10)
{
minutes = "0" + minutes;
}
var seconds = today.getSeconds();
if (seconds < 10)
{
seconds = "0" + seconds;
}
return hours + ":" + minutes + ":" + seconds + " " + setting;
}
]]>
</msxsl:script>
<xsl:template name="StyleSheetHelp">
<div class="section1">
<h4 lang="en">Notes</h4>
<p class="normal1" lang="en">
You must have created cross sections along your alignment and the cross section set must
have the surfaces and features upon which you wish to report displayed.
</p>
<p class="normal1" lang="en">
You can create the XML data file from the <em>Evaluation > Cross Section > Cross
Section Report</em> command or from the <em>End-Area Volumes</em> leaf of the <em>
Evaluation > Cross Section > Cross Sections</em> command by toggling on the <em>
Create XML Report</em> option on the <em>General</em> leaf.
</p>
<p class="normal1" lang="en">
This report works only with surfaces whose <em>Type</em> on the <em>Main</em> tab of the
<em>Surface > Surface Properties</em> command is set to <em>Design</em>.  It works
best if all features (except the catchpoints) included in the XML data file have
names.  There should also be a point at the center line for best results. 
Components are not reported.
</p>
<p class="small" lang="en">
<em>© 2010 Bentley Systems, Inc</em>
</p>
</div>
</xsl:template>
</xsl:stylesheet>
我在这里创建了一个名为format.xsl的格式文件的公共链接： https://dl.dropboxusercontent.com/u/48414836/format.xsl
此图像显示正确和不正确的输出：Improper and Proper Outputs
我非常感谢对此的一些帮助，因为我做了大量的研究，并尝试过来自许多不同网站的多种不同解决方案，但没有成功。
提前致谢。
