diff --git a/main.go b/main.go
index 8b541dc..f0831e8 100644
--- a/main.go
+++ b/main.go
@@ -36,6 +36,18 @@ func init() {
 	readingsFilename = filepath.Join(ketotrackDir, "readings.json")
 }
 
+// Record holds a pointer to a Reading or Note.
+type Record struct {
+	Reading *Reading `json:"reading,omitempty"`
+	Note    *Note    `json:"note,omitempty"`
+}
+
+// Note holds a text note along with the time the note was taken.
+type Note struct {
+	Time time.Time `json:"time"`
+	Text string    `json:"text"`
+}
+
 // Reading holds the glucose and ketone level measurements along with the time the measurements were taken.
 type Reading struct {
 	Time    time.Time `json:"time"`