diff --git a/lib/parser/basic_types.rb b/lib/parser/basic_types.rb
index 0ca51a2d..6136d08c 100644
--- a/lib/parser/basic_types.rb
+++ b/lib/parser/basic_types.rb
@@ -1,9 +1,32 @@
 module Parser
+  # Basic types are numbers and strings
+  # later maybe arrays and hashes
+  # floats ?  
   module BasicTypes
     include Parslet
     rule(:space)  { match('\s').repeat(1) }
     rule(:space?) { space.maybe }
     rule(:name)   { match('[a-z]').repeat(1).as(:name) >> space? }
-    rule(:number) { match('[0-9]').repeat(1).as(:number) >> space? }
+    rule(:double_quote){ str('"') }
+    rule(:minus) { str('-') }
+    rule(:plus) { str('+') }
+    rule(:sign) { plus | minus }
+    rule(:dot) { str('.') }
+    rule(:digit) { match('[0-9]') }
+    rule(:exponent) { (str('e')| str('E')) }
+    rule(:escaped_character)  { str('\\') >> (match('["\\\\/bfnrt]') | (str('u') >> hexdigit.repeat(4,4))) }
+ 
+    rule(:true) { str('true').as(:true) }
+    rule(:false) {      str('false').as(:false) }
+    rule(:nil) { str('null').as(:nil) }
+    
+    #anything in double quotes
+    rule(:string){
+      double_quote >> (escaped_character | double_quote.absent? >> any ).repeat.as(:string) >> double_quote
+    }
+    rule(:integer)    { sign.maybe >> digit.repeat(1).as(:integer) >> space? }
+    
+    rule(:float) { integer >>  dot >> integer >> 
+                            (exponent >> sign.maybe >> digit.repeat).maybe}
   end
 end
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