question: public boolean pushNamespace ( String prefix , String uri , int elemDepth ) { if ( prefix . startsWith ( XML_PREFIX ) ) { return false ; } Stack stack ; if ( ( stack = ( Stack ) m_namespaces . get ( prefix ) ) == null ) { m_namespaces . put ( prefix , stack = new Stack ( ) ) ; } if ( ! stack . empty ( ) ) { MappingRecord mr = ( MappingRecord ) stack . peek ( ) ; if ( uri . equals ( mr . m_uri ) || elemDepth == mr . m_declarationDepth ) { return false ; } } MappingRecord map = new MappingRecord ( prefix , uri , elemDepth ) ; stack . push ( map ) ; m_nodeStack . push ( map ) ; return true ; }
target:  Declare a mapping of a prefix to namespace URI at the given element depth.