我正在使用xsl将xml转换为kml格式。我想向xsl添加条件逻辑,以根据属性值的一部分切换styleUrl。属性名称为FROM_SYSTEM_ID
。属性值的格式为“A-123-CAM-1”,其中“CAM”是字符串的一部分,用于确定要使用的样式定义(在本例中,CAM代表Camera,CAB代表Cabinet等)。
如何解析此属性以执行所需的样式定义开关?
以下是我的xsl模板:
<xsl:template match="Line">
<Folder>
<name>
Lines
<!--<xsl:value-of select="@name"/>-->
</name>
<xsl:for-each select="Row">
<Placemark>
<name>
<xsl:value-of select="@FROM_SYSTEM_ID"/>
</name>
<description>
<xsl:value-of select="@TO_SYSTEM_ID"/>
</description>
<styleUrl>#msn_open-diamond00</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>
<xsl:value-of select="@FromLong"/>,<xsl:value-of select="@FromLat"/>,0 <xsl:value-of select="@ToLong"/>,<xsl:value-of select="@ToLat"/>,0
</coordinates>
</LineString>
</Placemark>
</xsl:for-each>
</Folder>
</xsl:template>
以下是XML的示例:
<Line>
<Row PrimaryRoute="A-123" FROM_SYSTEM_ID="A-123-CAB-1"
TO_SYSTEM_ID="A-123-CAM-3" FromLat="42.624948852000"
FromLong="-83.107221652500"
ToLat="42.624940325900" ToLong="-83.107353167000" />
<Row PrimaryRoute="A-123" FROM_SYSTEM_ID="A-123-CAM-1"
TO_SYSTEM_ID="A-123-HH-16" FromLat="42.641662528600"
FromLong="-83.151500129600"
ToLat="42.641709802200" ToLong="-83.151552587600" />
<!-- additional rows here -->
</Line>
答案 0 :(得分:0)
您可以使用CAM
和CAB
的组合提取FROM_SYSTEM_ID
属性的substring-after
或substring-before
部分:
<xsl:value-of select="
substring-before(
substring-after(
substring-after(@FROM_SYSTEM_ID, '-'), '-'), '-')"/>
将它与样式表放在一起:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="Line">
<Folder>
<name>
Lines
<!--<xsl:value-of select="@name"/>-->
</name>
<xsl:for-each select="Row">
<Placemark>
<name>
<xsl:value-of select="@FROM_SYSTEM_ID"/>
</name>
<description>
<xsl:value-of select="@TO_SYSTEM_ID"/>
</description>
<styleUrl>
<xsl:value-of select="
substring-before(
substring-after(
substring-after(@FROM_SYSTEM_ID, '-'), '-'), '-')"/>
</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>
<xsl:value-of select="@FromLong"/>,<xsl:value-of select="@FromLat"/>,0 <xsl:value-of select="@ToLong"/>,<xsl:value-of select="@ToLat"/>,0
</coordinates>
</LineString>
</Placemark>
</xsl:for-each>
</Folder>
</xsl:template>
</xsl:stylesheet>
应用于此输入:
<Line>
<Row PrimaryRoute="A-123" FROM_SYSTEM_ID="A-123-CAB-1"
TO_SYSTEM_ID="A-123-CAM-3" FromLat="42.624948852000"
FromLong="-83.107221652500"
ToLat="42.624940325900" ToLong="-83.107353167000" />
<Row PrimaryRoute="A-123" FROM_SYSTEM_ID="A-123-CAM-1"
TO_SYSTEM_ID="A-123-HH-16" FromLat="42.641662528600"
FromLong="-83.151500129600"
ToLat="42.641709802200" ToLong="-83.151552587600" />
</Line>
产生以下结果:
<Folder>
<name>Lines</name>
<Placemark>
<name>A-123-CAB-1</name>
<description>A-123-CAM-3</description>
<styleUrl>CAB</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>-83.107221652500,42.624948852000,0
-83.107353167000,42.624940325900,0
</coordinates>
</LineString>
</Placemark>
<Placemark>
<name>A-123-CAM-1</name>
<description>A-123-HH-16</description>
<styleUrl>CAM</styleUrl>
<LineString>
<tessellate>1</tessellate>
<coordinates>-83.151500129600,42.641662528600,0
-83.151552587600,42.641709802200,0
</coordinates>
</LineString>
</Placemark>
</Folder>