Фрагмент web.xml для tomcat

<​?xml version="1.0" encoding="UTF-8"?​>
<​web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"​>

...

   <​resource-ref​>
       <​description​>Base Main Database<​/description​>
       <​res-ref-name​>jdbc/DB<​/res-ref-name​>
       <​res-type​>javax.sql.DataSource<​/res-type​>
       <​res-auth​>Container<​/res-auth​>
       <​res-sharing-scope​>Shareable<​/res-sharing-scope​>
   <​/resource-ref​>

...

<​/web-app​>