diff --git a/README.md b/README.md
index 833257d..5b0fc39 100644
--- a/README.md
+++ b/README.md
@@ -3,3 +3,4 @@ an erlang time zone compiler
 
 see the [tz database](http://www.twinsun.com/tz/tz-link.htm) page for more info.
 
+This project is in the public domain.
diff --git a/include/ezic.hrl b/include/ezic.hrl
new file mode 100644
index 0000000..4a35ad3
--- /dev/null
+++ b/include/ezic.hrl
@@ -0,0 +1,12 @@
+
+-record(rule, {name, from, to, type, in, on, at, save, letters}).
+
+
+-record(zone, {name, gmtoff, rules, format, until}).
+
+
+-record(link, {from, to}).
+
+
+% a flattened zone record, giving specific information for a specific time range.
+-record(flatzone, {tzname, tzrule, from, to, gmtoff}).