get the prefix of a fully qualified tag name . concode_field_sep String XML_NAMESPACE_PREFIX concode_elem_sep String prefix concode_elem_sep String uri concode_field_sep String getAsAttributeName
String function ( String arg0 ) { if ( arg0 != null ) { int loc0 = arg0 . indexOf ( ':' ) ; if ( loc0 > 0 ) { return arg0 . substring ( 0 , loc0 ) ; } } return null ; }