如何总结，组4000+ GPX航迹点，通过每一天的日期命名的曲目？(How to summarize

下面的XSLT只提取自仪GPX文件的所有航迹点（trkpt）（omiting任何航点）和出口的结果为一（1）跟踪到一个新的GPX文件准备的MapSource或大本营。目前一个曲目的名称是第一个指点杆的日期。

我怎样才能做到让每个每个日期（YYYY-MM-DD），其中每个轨道包括其所有相应的航迹命名为一天一个轨道？

（我相信，在trkpt /时间日期改变必须考虑到，但我在这里丢失）。

该GPX-的资源文件可以通过创建Garmin任何较大的GPX文件（不知道其他人）。我的源文件跨越3个月指点杆记录旅行的每四分钟（期间75天共7633 trkpt）的拍摄。当然，该设备被拒绝，而睡觉的。下面请参阅命名为文件的XSLT代码：“提取物TRKPTs.xsl”

<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:gpx="http://www.topografix.com/GPX/1/1"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
<xsl:output method="text" indent="yes" encoding="utf-8" />
<!-- command: msxsl.exe 20101008.gpx extract-TRKPTs.xsl > 20101008-trkpts.gpx -->
<!-- extracts all trackpoints only from a given Garmin GPX file -->
<!-- output is piped into a new .gpx file -->
<xsl:template match="/">&#60;<xsl:text>?xml version="1.0" encoding="utf-8" standalone="no" ?&#62;</xsl:text>
&#60;<xsl:text>gpx xmlns="http://www.topografix.com/GPX/1/1" creator="MapSource 6.16.2" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd"</xsl:text>&#62;
<gpx>
<trk>&#60;trk&#62;
&#60;name&#62;Trackpoints: <xsl:value-of select="substring(/gpx:gpx/gpx:trk/gpx:trkseg/gpx:trkpt/gpx:time,1,10)"/>&#60;/name&#62;
<trkseg>&#60;trkseg&#62;
    <xsl:for-each select="/gpx:gpx/gpx:trk/gpx:trkseg/gpx:trkpt">
    <xsl:value-of select="gpx:trkpt"/><trkpt>
        &#60;<xsl:text>trkpt lat="</xsl:text><xsl:value-of select="@lat"/><xsl:text>" lon="</xsl:text><xsl:value-of select="@lon"/><xsl:text>"</xsl:text>&#62;
        &#60;ele&#62;<xsl:value-of select="gpx:ele"/>&#60;/ele&#62;
        &#60;time&#62;<xsl:value-of select="gpx:time"/>&#60;/time&#62;
        &#60;/trkpt&#62;</trkpt>
    </xsl:for-each>
</trkseg>&#60;/trkseg&#62;
</trk>&#60;/trk&#62;
</gpx>&#60;/gpx&#62;
</xsl:template>
</xsl:stylesheet>

因为它被设置为输出“文本”所以我就需要使用特殊字符实体代码看起来丑陋。但是，嘿，到目前为止，它的工作原理。对不起，我是一个XSLT的新手。感谢您的反馈意见。

电流输出如下（在一个单一的轨道的所有航迹点）：

<?xml version="1.0" encoding="utf-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="MapSource 6.16.2" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
<trk>
<name>Trackpoints: 2010-09-21</name>
<trkseg>
    <trkpt lat="34.004124635830522" lon="-118.47464606165886">
    <ele>55.4130859375</ele>
    <time>2010-09-21T19:51:12Z</time>
    </trkpt>
    <trkpt lat="34.004120444878936" lon="-118.47464254125953">
    <ele>55.4130859375</ele>
    <time>2010-09-21T19:51:26Z</time>
    </trkpt>
    <trkpt lat="34.004129162058234" lon="-118.47465343773365">
    <ele>56.8551025390625</ele>
    <time>2010-09-22T21:02:55Z</time>
    </trkpt>
...
...
    <trkpt lat="37.042149296030402" lon="-112.52694656141102">
    <ele>1506.523193359375</ele>
    <time>2010-12-01T07:01:06Z</time>
    </trkpt>
    <trkpt lat="37.042256919667125" lon="-112.52645093947649">
    <ele>1504.1201171875</ele>
    <time>2010-12-01T07:01:23Z</time>
    </trkpt>
</trkseg>
</trk>
</gpx>

预期的输出结果如下（请注意：每天一个轨道）。

<?xml version="1.0" encoding="utf-8" standalone="no" ?>
<gpx xmlns="http://www.topografix.com/GPX/1/1" creator="MapSource 6.16.2" version="1.1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd">
<trk>
<name>Trackpoints: 2010-09-21</name>
<trkseg>
    <trkpt lat="34.004124635830522" lon="-118.47464606165886">
    <ele>55.4130859375</ele>
    <time>2010-09-21T19:51:12Z</time>
    </trkpt>
    <trkpt lat="34.004120444878936" lon="-118.47464254125953">
    <ele>55.4130859375</ele>
    <time>2010-09-21T19:51:26Z</time>
    </trkpt>
    <trkpt lat="34.004129162058234" lon="-118.47465343773365">
    <ele>56.8551025390625</ele>
    <time>2010-09-22T21:02:55Z</time>
    </trkpt>
</trkseg>
</trk>
...
...
<trk>
<name>Trackpoints: 2010-12-01</name>
<trkseg>

    <trkpt lat="37.042149296030402" lon="-112.52694656141102">
    <ele>1506.523193359375</ele>
    <time>2010-12-01T07:01:06Z</time>
    </trkpt>
    <trkpt lat="37.042256919667125" lon="-112.52645093947649">
    <ele>1504.1201171875</ele>
    <time>2010-12-01T07:01:23Z</time>
    </trkpt>
</trkseg>
</trk>
</gpx>

你应该能够做到这一点使用Muenchian分组的。

由于您没有提供例如输入，I（修改例子的版本做了我自己在这里）。

XML输入

<gpx xmlns="http://www.topografix.com/GPX/1/1" 
    xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
    xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1" 
    creator="Oregon 400t" 
    version="1.1"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd">
    <metadata>
        <link href="http://www.garmin.com">
            <text>Garmin International</text>
        </link>
        <time>2009-10-17T22:58:43Z</time>
    </metadata>
    <trk>
        <name>Example 1</name>
        <trkseg>
            <trkpt lat="47.644548" lon="-122.326897">
                <ele>4.46</ele>
                <time>2009-10-17T18:37:26Z</time>
            </trkpt>
            <trkpt lat="47.644548" lon="-122.326898">
                <ele>4.47</ele>
                <time>2009-10-17T18:38:26Z</time>
            </trkpt>
            <trkpt lat="47.644548" lon="-122.326898">
                <ele>4.48</ele>
                <time>2009-10-18T18:39:26Z</time>
            </trkpt>
        </trkseg>
    </trk>
    <trk>
        <name>Example 2</name>
        <trkseg>
            <trkpt lat="47.644548" lon="-122.326899">
                <ele>4.49</ele>
                <time>2009-10-18T18:37:26Z</time>
            </trkpt>
            <trkpt lat="47.644548" lon="-122.326900">
                <ele>4.50</ele>
                <time>2009-10-18T18:38:26Z</time>
            </trkpt>
            <trkpt lat="47.644548" lon="-122.326901">
                <ele>4.51</ele>
                <time>2009-10-19T18:39:26Z</time>
            </trkpt>
        </trkseg>    
    </trk>
</gpx>

XSLT 1.0

<xsl:stylesheet version="1.0" 
    xmlns="http://www.topografix.com/GPX/1/1" 
    xmlns:gpx="http://www.topografix.com/GPX/1/1" 
    xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
    exclude-result-prefixes="gpx">
    <xsl:output indent="yes"/>
    <xsl:strip-space elements="*"/>

    <xsl:key name="date" match="gpx:trkpt" use="substring(gpx:time,1,10)"/>

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

    <xsl:template match="/*">
        <xsl:copy>
            <xsl:apply-templates select="@*"/>
            <xsl:for-each select="//gpx:trkpt[generate-id(key('date',substring(gpx:time,1,10))[1])=generate-id()]">
                <trk>
                    <name>Trackpoints: <xsl:value-of select="substring(gpx:time,1,10)"/></name>
                    <trkseg>
                        <xsl:for-each select="key('date',substring(gpx:time,1,10))">
                            <xsl:copy-of select="."/>
                        </xsl:for-each>
                    </trkseg>
                </trk>
            </xsl:for-each>
        </xsl:copy>        
    </xsl:template>

</xsl:stylesheet>

XML输出

<gpx xmlns="http://www.topografix.com/GPX/1/1"
     xmlns:gpxx="http://www.garmin.com/xmlschemas/GpxExtensions/v3"
     xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v1"
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
     creator="Oregon 400t"
     version="1.1"
     xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.garmin.com/xmlschemas/GpxExtensions/v3 http://www.garmin.com/xmlschemas/GpxExtensionsv3.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v1 http://www.garmin.com/xmlschemas/TrackPointExtensionv1.xsd">
   <trk>
      <name>Trackpoints: 2009-10-17</name>
      <trkseg>
         <trkpt lat="47.644548" lon="-122.326897">
            <ele>4.46</ele>
            <time>2009-10-17T18:37:26Z</time>
         </trkpt>
         <trkpt lat="47.644548" lon="-122.326898">
            <ele>4.47</ele>
            <time>2009-10-17T18:38:26Z</time>
         </trkpt>
      </trkseg>
   </trk>
   <trk>
      <name>Trackpoints: 2009-10-18</name>
      <trkseg>
         <trkpt lat="47.644548" lon="-122.326898">
            <ele>4.48</ele>
            <time>2009-10-18T18:39:26Z</time>
         </trkpt>
         <trkpt lat="47.644548" lon="-122.326899">
            <ele>4.49</ele>
            <time>2009-10-18T18:37:26Z</time>
         </trkpt>
         <trkpt lat="47.644548" lon="-122.326900">
            <ele>4.50</ele>
            <time>2009-10-18T18:38:26Z</time>
         </trkpt>
      </trkseg>
   </trk>
   <trk>
      <name>Trackpoints: 2009-10-19</name>
      <trkseg>
         <trkpt lat="47.644548" lon="-122.326901">
            <ele>4.51</ele>
            <time>2009-10-19T18:39:26Z</time>
         </trkpt>
      </trkseg>
   </trk>
</gpx>