# File rexml/element.rb, line 1135 def prefixes ns = [] each_attribute do |attribute| ns << attribute.name if attribute.prefix == "xmlns" end if @element.document and @element.document.doc_type expn = @element.expanded_name expn = @element.document.doc_type.name if expn.size == 0 @element.document.doc_type.attributes_of(expn).each { |attribute| ns << attribute.name if attribute.prefix == 'xmlns' } end ns end