diff --git a/attn/pel/pel_common.hpp b/attn/pel/pel_common.hpp
new file mode 100644
index 0000000..d0f3e15
--- /dev/null
+++ b/attn/pel/pel_common.hpp
@@ -0,0 +1,69 @@
+#pragma once
+
+#include <cstddef> // for size_t
+
+namespace attn
+{
+namespace pel
+{
+
+enum class SectionID
+{
+    privateHeader = 0x5048, // 'PH'
+    userHeader    = 0x5548, // 'UH'
+    primarySRC    = 0x5053, // 'PS'
+};
+
+enum class ComponentID
+{
+    attentionHandler = 0xd100
+};
+
+enum class CreatorID
+{
+    hostboot   = 'B',
+    hypervisor = 'H',
+    openbmc    = 'O'
+};
+
+enum class SubsystemID
+{
+    hypervisor = 0x82,
+    hostboot   = 0x8a,
+    openbmc    = 0x8d
+};
+
+enum class Severity
+{
+    information = 0x00,
+    termination = 0x51
+};
+
+enum class EventType
+{
+    na    = 0x00,
+    trace = 0x02
+};
+
+enum class ActionFlags
+{
+    service = 0x8000,
+    report  = 0x2000,
+    call    = 0x0800
+};
+
+inline ActionFlags operator|(ActionFlags a, ActionFlags b)
+{
+    return static_cast<ActionFlags>(static_cast<int>(a) | static_cast<int>(b));
+}
+
+enum class EventScope
+{
+    platform = 0x03
+};
+
+constexpr size_t numSrcWords = 8;  // number of SRC hex words
+const size_t asciiStringSize = 32; // size of SRC ascii string
+
+} // namespace pel
+} // namespace attn