commit b4553e0e494df55d7ce010fa9e673f144c82c064
Author: joy <joy224961632@gmail.com>
Date:   Thu Apr 9 12:49:52 2026 +0900

    新增 0409/river.rdf
    
    Signed-off-by: joy <joy224961632@gmail.com>

diff --git a/0409/river.rdf b/0409/river.rdf
new file mode 100644
index 0000000..961dee8
--- /dev/null
+++ b/0409/river.rdf
@@ -0,0 +1,37 @@
+<?xml version="1.0"?>
+    <River rdf:ID="Yangtze"
+        xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+        xmlns="http://www.geodesy.org/river#"
+        xml:base="http://nfu.edu.csie.ccis/11463144"
+    >
+        <length>6300 kilometers</length>
+        <startingLocation>western China's Qinghai-Tibet Plateau</startingLocation>
+        <endingLocation>East China Sea</endingLocation>
+        <obstacle>
+            <Dam rdf:ID="ThreeGorges"
+                    xmlns="http://www.geodesy.org/dam">
+                <name>The Three Gorges Dam</name>
+                <width>1.5 miles</width>
+                <height>610 feet</height>
+                <cost>$30 billion</cost>
+            </Dam>
+        </obstacle>
+    </River>
+
+
+http://nfu.edu.csie.ccis/11463144#Yangtze
+http://nfu.edu.csie.ccis/11463144#ThreeGorges
+
+
+http://www.geodesy.org/river#River
+http://www.geodesy.org/river#length
+http://www.geodesy.org/river#startingLocation
+http://www.geodesy.org/river#endingLocation
+
+
+
+http://www.geodesy.org/dam#Dam
+http://www.geodesy.org/dam#name
+http://www.geodesy.org/dam#width
+http://www.geodesy.org/dam#height
+http://www.geodesy.org/dam#cost
\ No newline at end of file