diff --git a/main.go b/main.go
new file mode 100644
index 0000000..da29a2c
--- /dev/null
+++ b/main.go
@@ -0,0 +1,4 @@
+package main
+
+func main() {
+}
diff --git a/pttodo/root.go b/pttodo/root.go
new file mode 100644
index 0000000..8c74aea
--- /dev/null
+++ b/pttodo/root.go
@@ -0,0 +1,7 @@
+package pttodo
+
+type Root struct {
+	Todo      []Todo
+	Scheduled []Todo
+	Done      []Todo
+}
diff --git a/pttodo/schedule.go b/pttodo/schedule.go
new file mode 100644
index 0000000..2cc18cd
--- /dev/null
+++ b/pttodo/schedule.go
@@ -0,0 +1,3 @@
+package pttodo
+
+type Schedule string
diff --git a/pttodo/todo.go b/pttodo/todo.go
new file mode 100644
index 0000000..f400f88
--- /dev/null
+++ b/pttodo/todo.go
@@ -0,0 +1,8 @@
+package pttodo
+
+type Todo struct {
+	Todo     string
+	Detail   string
+	TS       TS
+	Schedule Schedule
+}
diff --git a/pttodo/ts.go b/pttodo/ts.go
new file mode 100644
index 0000000..4eebf9a
--- /dev/null
+++ b/pttodo/ts.go
@@ -0,0 +1,3 @@
+package pttodo
+
+type TS string
diff --git a/sample.yaml b/sample.yaml
index 547ea88..07abf27 100644
--- a/sample.yaml
+++ b/sample.yaml
@@ -3,12 +3,16 @@ todo:
     detail: |
       my super long description
       of stuff
-  - when: 321 # unix seconds int64
+    ts: 111
+  -
     todo: task that appeared when 'when'
-    loop: "* * * * *" # or ([0-9]*[a-z])+ for durations, or null for scheduled/deferred
+    loop: "* * * * *" # or ([0-9]*[a-z])+ for durations, or int for scheduled/deferred
+    ts: 222
 scheduled:
-  - when: 123 # unix seconds int64
+  -
     todo: task that will appear when 'when'
-    loop: "* * * * *" # or ([0-9]*[a-z])+ for durations, or null for scheduled/deferred
+    loop: "* * * * *" # or ([0-9]*[a-z])+ for durations, or int for scheduled/deferred
+    ts: 333
 done:
   - todo: task that is done
+    ts: 444