content -> String | nil
[permalink][rdoc]XML 処理命令の内容を返します。
require 'rexml/document' doc = REXML::Document.new(<<EOS) <?xml version="1.0" encoding="utf-8" ?> <?xml-stylesheet type="text/css" href="style.css"?> <?foobar?> <root /> EOS doc[2] # => <?p-i xml-stylesheet ...?> doc[2].target # => "xml-stylesheet" doc[2].content # => "type=\"text/css\" href=\"style.css\"" doc[4].target # => "foobar" doc[4].content # => nil