More complexity

[Gys]

Hi!

Indeed there do not seem to be many KML readers. Maybe because KML is formatted as XML which is (as a format) easy to parse.

I came across your reader while looking at a KML file with a little more complexity. I assume KML in the wild is more like this, also considering what the different KML writers are capable of. For example: https://pkg.go.dev/github.com/twpayne/go-kml/v3

Edit: I posted this because according to your reader this document is empty. But looking into your code I see your definition of KML is more extensive than I thought. Sorry for that. Still, the file below seems not to parse well with your code. The file imports into the mobile app Organic Maps without problems.

<?xml version='1.0' encoding='UTF-8'?>
<kml xmlns='http://www.opengis.net/kml/2.2' xmlns:gx='http://www.google.com/kml/ext/2.2' xmlns:kml='http://www.opengis.net/kml/2.2' xmlns:atom='http://www.w3.org/2005/Atom'>
<Document>

	<name>Jacobswegen-wandelaars-ES-20240724</name>

	<!-- ======= Start Styles Routes ======= -->
	<StyleMap id="msn_Hoofdroute1">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Hoofdroute1</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Hoofdroute1</styleUrl>
		</Pair>
	</StyleMap>
	<Style id="sn_Hoofdroute1">
		<LineStyle>
			<color>ff00ffff</color>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Hoofdroute1">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_Hoofdroute2">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Hoofdroute2</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Hoofdroute2</styleUrl>
		</Pair>
	</StyleMap>
	<Style id="sn_Hoofdroute2">
		<LineStyle>
			<color>ff1c19d7</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Hoofdroute2">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_Hoofdroute3">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Hoofdroute3</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Hoofdroute3</styleUrl>
		</Pair>
	</StyleMap>

	<Style id="sn_Hoofdroute3">
		<LineStyle>
			<color>ff0055ff</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Hoofdroute3">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_Hoofdroute4">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Hoofdroute4</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Hoofdroute4</styleUrl>
		</Pair>
	</StyleMap>

	<Style id="sn_Hoofdroute4">
		<LineStyle>
			<color>ff701919</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Hoofdroute4">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_Link">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Link</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Link</styleUrl>
		</Pair>
	</StyleMap>
	<Style id="sn_Link">
		<LineStyle>
			<color>ffb67b2c</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004A88D4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Link">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004A88D4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_Variant">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_Variant</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_Variant</styleUrl>
		</Pair>
	</StyleMap>
	<Style id="sn_Variant">
		<LineStyle>
			<color>ffff00ff</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_Variant">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<StyleMap id="msn_NietInGebruik">
		<Pair>
			<key>normal</key>
			<styleUrl>#sn_NietInGebruik</styleUrl>
		</Pair>
		<Pair>
			<key>highlight</key>
			<styleUrl>#sh_NietInGebruik</styleUrl>
		</Pair>
	</StyleMap>
	<Style id="sn_NietInGebruik">
		<LineStyle>
			<color>ff294c75</color>>
			<width>4</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>
	<Style id="sh_NietInGebruik">
		<LineStyle>
			<color>ff00ffaa</color>
			<width>6</width>
		</LineStyle>
		<BalloonStyle>
              <bgColor>004a88d4</bgColor>
              <text>
                <![CDATA[
                <b><font color="#BB0000" size="+1">$[name]</font></b>
                <br><br>
                <font face="Arial">$[description]</font>
                <!--$[geDirections]-->
                ]]>
              </text>
        </BalloonStyle>
	</Style>

	<Style id="placemark-yellow">
		<IconStyle>
			<Icon>
				<href>https://omaps.app/placemarks/placemark-yellow.png</href>
			</Icon>
		</IconStyle>
	</Style>

	<!-- ======= End Styles Routes ======= -->

	<!-- ======= Start Main Folder Spanje ======= -->
	<Folder>
		<name>Jacobswegen in Spanje</name>
		<open>1</open>

		<!-- ======= Start Hoofdroutes Spanje ======= -->
		<Folder>
			<name>Routes</name>

			<Placemark>
				<name>Camino Frances</name>
				<description>
					<![CDATA[Saint Jean Pied de Port - Santiago de Compostela: 761 km<br><br><a href="www.santiago.nl/downloads">Bron</a><br><a href="https://www.santiago.nl/product-categorie/gidsen/gidsen-spanje/">Diverse gidsen</a>]]>
				</description>
				<styleUrl>#msn_Hoofdroute1</styleUrl>
				<MultiGeometry>
					<LineString>
						<tessellate>1</tessellate>
						<coordinates>
							-1.23585,43.16339,191 -1.23641,43.1631,186 -1.23697,43.16281,178 -1.23721,43.16239,171 -1.23745,43.16197,171 ....

[Gys]

I am using this struct now to read the file:

type Kml struct {
XMLName  xml.Name `xml:"kml"`
Text     string   `xml:",chardata"`
Xmlns    string   `xml:"xmlns,attr"`
Gx       string   `xml:"gx,attr"`
Kml      string   `xml:"kml,attr"`
Atom     string   `xml:"atom,attr"`
Document struct {
	Text string `xml:",chardata"`
	Name struct {
		Text string `xml:",chardata"`
	} `xml:"name"`
	StyleMap []struct {
		Text string `xml:",chardata"`
		ID   string `xml:"id,attr"`
		Pair []struct {
			Text string `xml:",chardata"`
			Key  struct {
				Text string `xml:",chardata"`
			} `xml:"key"`
			StyleUrl struct {
				Text string `xml:",chardata"`
			} `xml:"styleUrl"`
		} `xml:"Pair"`
	} `xml:"StyleMap"`
	Style []struct {
		Text      string `xml:",chardata"`
		ID        string `xml:"id,attr"`
		LineStyle struct {
			Text  string `xml:",chardata"`
			Color struct {
				Text string `xml:",chardata"`
			} `xml:"color"`
			Width struct {
				Text string `xml:",chardata"`
			} `xml:"width"`
		} `xml:"LineStyle"`
		BalloonStyle struct {
			Chardata string `xml:",chardata"`
			BgColor  struct {
				Text string `xml:",chardata"`
			} `xml:"bgColor"`
			Text struct {
				Text string `xml:",chardata"`
			} `xml:"text"`
		} `xml:"BalloonStyle"`
		IconStyle struct {
			Text string `xml:",chardata"`
			Icon struct {
				Text string `xml:",chardata"`
				Href struct {
					Text string `xml:",chardata"`
				} `xml:"href"`
			} `xml:"Icon"`
		} `xml:"IconStyle"`
	} `xml:"Style"`
	Folder []struct {
		Text string `xml:",chardata"`
		Name struct {
			Text string `xml:",chardata"`
		} `xml:"name"`
		Open struct {
			Text string `xml:",chardata"`
		} `xml:"open"`
		Folder []struct {
			Text string `xml:",chardata"`
			Name struct {
				Text string `xml:",chardata"`
			} `xml:"name"`
			Placemark []struct {
				Text string `xml:",chardata"`
				Name struct {
					Text string `xml:",chardata"`
				} `xml:"name"`
				Description struct {
					Text string `xml:",chardata"`
				} `xml:"description"`
				StyleUrl struct {
					Text string `xml:",chardata"`
				} `xml:"styleUrl"`
				MultiGeometry struct {
					Text       string `xml:",chardata"`
					LineString struct {
						Text       string `xml:",chardata"`
						Tessellate struct {
							Text string `xml:",chardata"`
						} `xml:"tessellate"`
						Coordinates struct {
							Text string `xml:",chardata"`
						} `xml:"coordinates"`
					} `xml:"LineString"`
				} `xml:"MultiGeometry"`
				BalloonVisibility struct {
					Text string `xml:",chardata"`
				} `xml:"balloonVisibility"`
				Point struct {
					Text        string `xml:",chardata"`
					Coordinates struct {
						Text string `xml:",chardata"`
					} `xml:"coordinates"`
				} `xml:"Point"`
				LineString struct {
					Text       string `xml:",chardata"`
					Tessellate struct {
						Text string `xml:",chardata"`
					} `xml:"tessellate"`
					Coordinates struct {
						Text string `xml:",chardata"`
					} `xml:"coordinates"`
				} `xml:"LineString"`
			} `xml:"Placemark"`
		} `xml:"Folder"`
	} `xml:"Folder"`
} `xml:"Document"`
}