解析获取带有地理标记数据的RSS源

我仍然在学习如何解析不同的XML源，所以我想知道如何解析XML源，如下所示。有没有可能解析这个不知道不同的XMl标签？任何步骤，链接或教程将有所帮助。解析获取带有地理标记数据的RSS源

http://earthquake.usgs.gov/earthquakes/catalogs/eqs1hour-M1.xml

<?xml version="1.0"?> 
<rss version="2.0" xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#" xmlns:dc="http://purl.org/dc/elements/1.1/"> 
    <channel> 
    <title>USGS M 1+ Earthquakes</title> 
    <description>Real-time, worldwide earthquake list for the past hour</description> 
    <link>http://earthquake.usgs.gov/earthquakes/</link> 
    <dc:publisher>U.S. Geological Survey</dc:publisher> 
    <pubDate>Wed, 16 Nov 2011 11:47:10 GMT</pubDate> 

    <item> 
     <pubDate>Wed, 16 Nov 2011 11:41:25 GMT</pubDate> 
     <title>M 1.1, Central California</title> 
     <description>November 16, 2011 11:41:25 GMT</description> 
     <link>http://earthquake.usgs.gov/earthquakes/recenteqsus/Quakes/nc71682246.php</link> 
     <geo:lat>37.5637</geo:lat> 
     <geo:long>-118.8648</geo:long> 
     <dc:subject>1</dc:subject> 
     <dc:subject>pasthour</dc:subject> 
     <dc:subject>4.60 km</dc:subject> 
     <guid isPermaLink="false">nc71682246</guid> 
    </item> 
    <item> 
     <pubDate>Wed, 16 Nov 2011 11:15:18 GMT</pubDate> 
     <title>M 4.5, Kodiak Island region, Alaska</title> 
     <description>November 16, 2011 11:15:18 GMT</description> 
     <link>http://earthquake.usgs.gov/earthquakes/recenteqsww/Quakes/ak10358657.php</link> 
     <geo:lat>57.6877</geo:lat> 
     <geo:long>-153.8939</geo:long> 
     <dc:subject>4</dc:subject> 
     <dc:subject>pasthour</dc:subject> 
     <dc:subject>39.50 km</dc:subject> 
     <guid isPermaLink="false">ak10358657</guid> 
    </item> 

    </channel> 
</rss>

来源

2011-04-19 user712109