names=target
visibility=public
kind=defined

--- target -> String
XML 処理命令のターゲットを返します。

==== 例
  require 'rexml/document'
  doc = REXML::Document.new(<<EOS)
  <?xml version="1.0" encoding="utf-8" ?>
  <?xml-stylesheet type="text/css" href="style.css"?>
  <root />
  EOS
  doc[2] # => <?p-i xml-stylesheet ...?>
  doc[2].target # => "xml-stylesheet"
  doc[2].content # => "type=\"text/css\" href=\"style.css\""

