Could not parse mapping document from input stream

Unable to parse the mapped document from the input stream

1. The defined class name or property name is incorrect, such as the entity class name corresponding to the attribute name in the *.hbm.xml file is inconsistent.
2.xml header File "Http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd" > instead:
"HTTP://HIBERNATE.SOURCEFORGE.NET/HIBERNATE-MAPPING-3.0.DTD" (generally not okay)

Could not parse mapping document from input stream