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+====== The intrinsincs of web.xml ======
+I've messing around searching for someone who explains me clearly the intrinsics
+of the configuration of the web.xml file and finally I've found something
+in a manual from oracle:
+http://download.oracle.com/docs/cd/E13222_01/wls/docs70/webapp/webappdeployment.htm
+I attach here for the sake of not loose it:
+{{:java:webapp.pdf}}
+And I don't want to loose the opportunity to to comment one thing: the issue of the
+context parameters.
+===== What Context Parameters Are =====
+Context Parameters are this: parameters that the application --or a library, also
+known these days as **framework**-- can read from the ''web.xml'' file.
+Here is the syntax to define a context parameter:
+<code xml>
+  <context-param>
+     <param-name>user-defined parameter name</param-name>
+     <param-value>user-defined parameter value</param-value>
+     <description>optional description, just text</description>
+  </context-param>
+</code>
+How can them be read:
+<code java>
+javax.servlet.ServletContext.getInitParameter()
+javax.servlet.ServletContext.getInitParameterNames()
+</code>