# File lib/haml/html.rb, line 201
201:       def to_haml(tabs, options)
202:         attrs = public_id.nil? ? ["", "", ""] :
203:           public_id.scan(/DTD\s+([^\s]+)\s*([^\s]*)\s*([^\s]*)\s*\/\//)[0]
204:         raise Haml::SyntaxError.new("Invalid doctype") if attrs == nil
205: 
206:         type, version, strictness = attrs.map { |a| a.downcase }
207:         if type == "html"
208:           version = ""
209:           strictness = "strict" if strictness == ""
210:         end
211: 
212:         if version == "1.0" || version.empty?
213:           version = nil
214:         end
215: 
216:         if strictness == 'transitional' || strictness.empty?
217:           strictness = nil
218:         end
219: 
220:         version = " #{version.capitalize}" if version
221:         strictness = " #{strictness.capitalize}" if strictness
222: 
223:         "#{tabulate(tabs)}!!!#{version}#{strictness}\n"
224:       end