# File lib/nokogiri.rb, line 55 def parse string, url = nil, encoding = nil, options = nil doc = if string =~ /^\s*<[^Hh>]*html/i # Probably html Nokogiri::HTML::Document.parse(string, url, encoding, options || XML::ParseOptions::DEFAULT_HTML) else Nokogiri::XML::Document.parse(string, url, encoding, options || XML::ParseOptions::DEFAULT_XML) end yield doc if block_given? doc end