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diff --git a/helm/ocaml/cic_textual_parser/cicTextualLexer.mll b/helm/ocaml/cic_textual_parser/cicTextualLexer.mll
new file mode 100644
index 000000000..d35a46695
--- /dev/null
+++ b/helm/ocaml/cic_textual_parser/cicTextualLexer.mll
@@ -0,0 +1,62 @@
+{
+ open CicTextualParser;;
+ module L = Lexing;;
+ module U = UriManager;;
+
+ let indtyuri_of_uri uri =
+  let index_sharp =  String.index uri '#' in
+  let index_num = index_sharp + 3 in
+   (UriManager.uri_of_string (String.sub uri 0 index_sharp),
+    int_of_string (String.sub uri index_num (String.length uri - index_num)) - 1
+   )
+ ;;
+
+ let indconuri_of_uri uri =
+  let index_sharp =  String.index uri '#' in
+  let index_div = String.rindex uri '/' in
+  let index_con = index_div + 1 in
+   (UriManager.uri_of_string (String.sub uri 0 index_sharp),
+    int_of_string
+     (String.sub uri (index_sharp + 3) (index_div - index_sharp - 3)) - 1,
+    int_of_string
+     (String.sub uri index_con (String.length uri - index_con))
+   )
+ ;;
+}
+let num = ['1'-'9']['0'-'9']* | '0'
+let ident = ['A'-'Z' 'a'-'z' '_' '-']*
+let baseuri = '/'(ident '/')* ident '.'
+let conuri = baseuri ("con" | "var")
+let indtyuri = baseuri "ind#1/" num
+let indconuri = baseuri "ind#1/" num "/" num
+let blanks = [' ' '\t' '\n']
+rule token =
+ parse
+    blanks      { token lexbuf } (* skip blanks *)
+  | "alias"     { ALIAS }
+  | "Case"      { CASE }
+  | "Fix"       { FIX }
+  | "CoFix"     { COFIX }
+  | "Set"       { SET }
+  | "Prop"      { PROP }
+  | "Type"      { TYPE }
+  | ident       { ID (L.lexeme lexbuf) }
+  | conuri      { CONURI (U.uri_of_string ("cic:" ^ L.lexeme lexbuf)) }
+  | indtyuri    { INDTYURI (indtyuri_of_uri ("cic:" ^ L.lexeme lexbuf)) }
+  | indconuri   { INDCONURI (indconuri_of_uri("cic:" ^ L.lexeme lexbuf)) }
+  | num         { NUM (int_of_string (L.lexeme lexbuf)) }
+  | '?' num     { META (int_of_string (L.lexeme lexbuf)) }
+  | ":>"        { CAST }
+  | ":="        { LETIN }
+  | '?'         { IMPLICIT }
+  | '('         { LPAREN }
+  | ')'         { RPAREN }
+  | '{'         { LCURLY }
+  | '}'         { RCURLY }
+  | ';'         { SEMICOLON }
+  | '\\'        { LAMBDA }
+  | '!'         { PROD }
+  | ':'         { COLON }
+  | '.'         { DOT }
+  | eof         { EOF }
+{}