# File lib/haml/html.rb, line 140
140:       def to_haml(tabs, options)
141:         attrs = public_id.nil? ? ["", "", ""] :
142:           public_id.scan(/DTD\s+([^\s]+)\s*([^\s]*)\s*([^\s]*)\s*\/\//)[0]
143:         if attrs == nil
144:           raise Exception.new("Invalid doctype")
145:         end
146: 
147:         type, version, strictness = attrs.map { |a| a.downcase }
148:         if type == "html"
149:           version = ""
150:           strictness = "strict" if strictness == ""
151:         end
152: 
153:         if version == "1.0" || version.empty?
154:           version = nil
155:         end
156: 
157:         if strictness == 'transitional' || strictness.empty?
158:           strictness = nil
159:         end
160: 
161:         version = " #{version.capitalize}" if version
162:         strictness = " #{strictness.capitalize}" if strictness
163: 
164:         "#{tabulate(tabs)}!!!#{version}#{strictness}\n"
165:       end