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diff --git a/matita/matita/contribs/lambdadelta/bin/xhtbl/table.ml b/matita/matita/contribs/lambdadelta/bin/xhtbl/table.ml
new file mode 100644
index 000000000..d3ee13bfa
--- /dev/null
+++ b/matita/matita/contribs/lambdadelta/bin/xhtbl/table.ml
@@ -0,0 +1,70 @@
+type css = string list
+
+type uri = string
+
+type ext = string
+
+type anchor = string
+
+type absolute = bool
+
+type size = {
+   y : int;         (* first row *)
+   x : int;         (* first column *)
+   rf: int;         (* finite rows *)
+   cf: int;         (* finite columns *)
+   ri: int;         (* infinite rows *)
+   ci: int;         (* infinite columns *)
+   p : bool option; (* parent kind *)
+}
+
+type border = {
+   n: bool; (* north *)
+   s: bool; (* south *)
+   e: bool; (* east *)
+   w: bool; (* west *)
+}
+
+type text = Plain of string
+          | Link of absolute * string * string
+
+type key = Text of text list
+         | Glue of int option
+
+type table = {
+           tn: anchor; (* named anchor *)
+   mutable tc: css;    (* css classes *)
+   mutable tu: uri;    (* uri *)
+   mutable tx: ext;    (* uri extension *)
+   mutable ts: size;   (* dimension *)
+           tb: border; (* border *)
+           te: entry;  (* contents *)
+	   ti: int;    (* table identifier *)
+}
+
+and entry = Key  of key
+          | Line of bool * table list (* true for a row *)
+
+let id =
+   let current = ref 0 in
+   fun () -> incr current; !current
+
+let no_size = {
+   y = 0; x = 0; rf = 0; cf = 0; ri = 0; ci = 0; p = None;
+}
+
+let border b = {
+   n = b; s = b; e = b; w = b;
+}
+
+let mk_key k tc tu tx tn = {
+   ts = no_size; tb = border false; te = Key k;
+   tc = tc; tu = tu; tx = tx; tn = tn;
+   ti = id ();
+}
+
+let mk_line b tl tc tu tx tn = {
+   ts = no_size; tb = border b; te = Line (b, tl);
+   tc = tc; tu = tu; tx = tx; tn = tn;
+   ti = id ();
+}