diff --git a/rails/db/seeds.rb b/rails/db/seeds.rb
index e6010e7..8014a56 100644
--- a/rails/db/seeds.rb
+++ b/rails/db/seeds.rb
@@ -317,10 +317,10 @@ keys.each do |key|
 end
 
 {
-  'none' => //,
-  'string' => /.*/,
-  'integer' => /\d+/,
-  'float' => /\d+(?:\.\d+)|\.\d+/,
+  'none' => /^$/,
+  'string' => /^.*$/,
+  'integer' => /^\d+$/,
+  'float' => /^\d+(?:\.\d+)|\.\d+$/,
 }.each_with_index do |(name, regex), i|
   Datatype
     .find_or_initialize_by(name: name)
@@ -354,7 +354,7 @@ Nokogiri::HTML
             Datatype.find_by!(name: 'none')
           else
             Datatype
-              .order(specifity: :asc)
+              .order(specifity: :desc)
               .find{ |datatype|
                 datatype.match? default
               } or raise(default)