Recently I downloaded netbeans IDE from http://netbeans.org/ everything seemed to be working fine until I tried to validate my .xsd file in it. It showed me an error “Cannot find the declaration of element ‘xsd:schema’.” even though my xsd file was valid and began with xsd tag <xsd:schema xmlns:xsd=http://www.w3.org/2001/XMLSchema targetNamespace="http://www.example.org/schema/test/v1" xmlns:tns="http://www.example.org/schema/test/v1" …