diff --git a/schemas/pu00_pulse_metadata.fbs b/schemas/pu00_pulse_metadata.fbs
new file mode 100644
index 0000000..ce26e27
--- /dev/null
+++ b/schemas/pu00_pulse_metadata.fbs
@@ -0,0 +1,17 @@
+// Schema for neutron pulse information
+
+file_identifier "pu00";
+
+table Pu00Message {
+    source_name : string (required);            // Field identifying the producer type, for example detector type
+    message_id : long;                          // Consecutive numbers, to detect missing or unordered messages. 
+    reference_time : long (required);           // Nanoseconds since Unix epoch (1 Jan 1970)
+                                                // If pulse times are available in the aquisition system, this field holds
+                                                // those timestamps. Holds wall time otherwise.
+
+    vetos : uint;                               // Veto bitmask for this frame
+    period_number : uint;                       // Period number into which this pulse was collected
+    proton_charge : float;                      // Proton charge for this frame (uAh per frame)
+}
+
+root_type Pu00Message;