diff --git a/libpldm/entity.h b/libpldm/entity.h
new file mode 100644
index 0000000..fe7ac80
--- /dev/null
+++ b/libpldm/entity.h
@@ -0,0 +1,145 @@
+#ifndef ENTITY_H
+#define ENTITY_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** @brief PLDM Entity ID Codes in DSP0249_1.1.0 specification
+ */
+enum pldm_entity_id_codes {
+	PLDM_ENTITY_UNSPECIFIED = 0,
+	PLDM_ENTITY_OTHER = 1,
+
+	/* Miscellaneous Entities */
+	PLDM_ENTITY_NETWORK = 2,
+	PLDM_ENTITY_GROUP = 3,
+	PLDM_ENTITY_REMOTE_MGMT_COMM_DEVICE = 4,
+	PLDM_ENTITY_EXTERNAL_ENVIRONMENT = 5,
+	PLDM_ENTITY_COMM_CHANNEL = 6,
+	PLDM_ENTITY_TERMINUS = 7,
+	PLDM_ENTITY_PLATFORM_EVENT_LOG = 8,
+
+	/* Human Interface Entities */
+	PLDM_ENTITY_KEYPAD = 15,
+	PLDM_ENTITY_SWITCH = 16,
+	PLDM_ENTITY_PUSHBUTTON = 17,
+	PLDM_ENTITY_DISPLAY = 18,
+	PLDM_ENTITY_INDICATOR = 19,
+
+	/* Software/Firmware Entities */
+	PLDM_ENTITY_SYS_MGMT_SW = 30,
+	PLDM_ENTITY_SYS_FIRMWARE = 31,
+	PLDM_ENTITY_OPERATING_SYS = 32,
+	PLDM_ENTITY_VIRTUAL_MACHINE_MANAGER = 33,
+	PLDM_ENTITY_OS_LOADER = 34,
+	PLDM_ENTITY_DEVICE_DRIVER = 35,
+	PLDM_ENTITY_MGMT_CONTROLLER_FW = 36,
+
+	/* Chassis/Enclosure Entities */
+	PLDM_ENTITY_SYSTEM_CHASSIS = 45,
+	PLDM_ENTITY_SUB_CHASSIS = 46,
+	PLDM_ENTITY_DISK_DRIVE_BAY = 47,
+	PLDM_ENTITY_PERIPHERAL_BAY = 48,
+	PLDM_ENTITY_DEVICE_BAY = 49,
+	PLDM_ENTITY_DOOR = 50,
+	PLDM_ENTITY_ACCESS_PANEL = 51,
+	PLDM_ENTITY_COVER = 52,
+
+	/* Board/Card/Module Entities */
+	PLDM_ENTITY_BOARD = 60,
+	PLDM_ENTITY_CARD = 61,
+	PLDM_ENTITY_MODULE = 62,
+	PLDM_ENTITY_SYS_MGMT_MODULE = 63,
+	PLDM_ENTITY_SYS_BOARD = 64,
+	PLDM_ENTITY_MEMORY_BOARD = 65,
+	PLDM_ENTITY_MEMORY_MODULE = 66,
+	PLDM_ENTITY_PROC_MODULE = 67,
+	PLDM_ENTITY_ADD_IN_CARD = 68,
+	PLDM_ENTITY_CHASSIS_FRONT_PANEL_BOARD = 69,
+	PLDM_ENTITY_BACK_PANEL_BOARD = 70,
+	PLDM_ENTITY_POWER_MGMT = 71,
+	PLDM_ENTITY_POWER_SYS_BOARD = 72,
+	PLDM_ENTITY_DRIVE_BACKPLANE = 73,
+	PLDM_ENTITY_SYS_INTERNAL_EXPANSION_BOARD = 74,
+	PLDM_ENTITY_OTHER_SYS_BOARD = 75,
+	PLDM_ENTITY_CHASSIS_BACK_PANEL_BOARD = 76,
+	PLDM_ENTITY_PROCESSING_BLADE = 77,
+	PLDM_ENTITY_CONNECTIVITY_SWITCH = 78,
+	PLDM_ENTITY_PROC_MEMORY_MODULE = 79,
+	PLDM_ENTITY_IO_MODULE = 80,
+	PLDM_ENTITY_PROC_IO_MODULE = 81,
+
+	/* Cooling Entities */
+	PLDM_ENTITY_COOLING_DEVICE = 90,
+	PLDM_ENTITY_COOLING_SUBSYSTEM = 91,
+	PLDM_ENTITY_COOLING_UNIT = 92,
+	PLDM_ENTITY_FAN = 93,
+	PLDM_ENTITY_PELTIER_COOLING_DEVICE = 94,
+	PLDM_ENTITY_LIQUID_COOLING_DEVICE = 95,
+	PLDM_ENTITY_LIQUID_COOLING_SUBSYSTEM = 96,
+
+	/* Storage Device Entities */
+	PLDM_ENTITY_OTHER_STORAGE_DEVICE = 105,
+	PLDM_ENTITY_FLOPPY_DRIVE = 106,
+	PLDM_ENTITY_FIXED_DISK_HARD_DRIVE = 107,
+	PLDM_ENTITY_CD_DRIVE = 108,
+	PLDM_ENTITY_CD_DVD_DRIVE = 109,
+	PLDM_ENTITY_OTHER_SILICON_STORAGE_DEVICE = 110,
+	PLDM_ENTITY_SOLID_STATE_SRIVE = 111,
+
+	/* Power Entities */
+	PLDM_ENTITY_POWER_SUPPLY = 120,
+	PLDM_ENTITY_BATTERY = 121,
+	PLDM_ENTITY_SUPER_CAPACITOR = 122,
+	PLDM_ENTITY_POWER_CONVERTER = 123,
+	PLDM_ENTITY_DC_DC_CONVERTER = 124,
+	PLDM_ENTITY_AC_MAINS_POWER_SUPPLY = 125,
+	PLDM_ENTITY_DC_MAINS_POWER_SUPPLY = 126,
+
+	/* Chip Entities */
+	PLDM_ENTITY_PROC = 135,
+	PLDM_ENTITY_CHIPSET_COMPONENT = 136,
+	PLDM_ENTITY_MGMT_CONTROLLER = 137,
+	PLDM_ENTITY_PERIPHERAL_CONTROLLER = 138,
+	PLDM_ENTITY_SEEPROM = 139,
+	PLDM_ENTITY_NVRAM_CHIP = 140,
+	PLDM_ENTITY_FLASH_MEMORY_CHIP = 141,
+	PLDM_ENTITY_MEMORY_CHIP = 142,
+	PLDM_ENTITY_MEMORY_CONTROLLER = 143,
+	PLDM_ENTITY_NETWORK_CONTROLLER = 144,
+	PLDM_ENTITY_IO_CONTROLLER = 145,
+	PLDM_ENTITY_SOUTH_BRIDGE = 146,
+	PLDM_ENTITY_REAL_TIME_CLOCK = 147,
+
+	/* Bus Entities */
+	PLDM_ENTITY_OTHER_BUS = 160,
+	PLDM_ENTITY_SYS_BUS = 161,
+	PLDM_ENTITY_I2C_BUS = 162,
+	PLDM_ENTITY_SMBUS_BUS = 163,
+	PLDM_ENTITY_SPI_BUS = 164,
+	PLDM_ENTITY_PCI_BUS = 165,
+	PLDM_ENTITY_PCI_EXPRESS_BUS = 166,
+	PLDM_ENTITY_PECI_BUS = 167,
+	PLDM_ENTITY_LPC_BUS = 168,
+	PLDM_ENTITY_USB_BUS = 169,
+	PLDM_ENTITY_FIREWIRE_BUS = 170,
+	PLDM_ENTITY_SCSI_BUS = 171,
+	PLDM_ENTITY_SATA_SAS_BUS = 172,
+	PLDM_ENTITY_PROC_FRONT_SIDE_BUS = 173,
+	PLDM_ENTITY_INTER_PROC_BUS = 174,
+
+	/* Connectors/Cables */
+	PLDM_ENTITY_CONNECTOR = 185,
+	PLDM_ENTITY_SLOT = 186,
+	PLDM_ENTITY_CABLE = 187,
+	PLDM_ENTITY_INTERCONNECT = 188,
+	PLDM_ENTITY_PLUG = 189,
+	PLDM_ENTITY_SOCKET = 190,
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* ENTITY_H */
diff --git a/libpldm/meson.build b/libpldm/meson.build
index 7c072a2..b253bfb 100644
--- a/libpldm/meson.build
+++ b/libpldm/meson.build
@@ -4,6 +4,7 @@
   'platform.h',
   'bios.h',
   'bios_table.h',
+  'entity.h',
   'states.h',
   'fru.h',
   'utils.h',