Internet Assigned Numbers Authority Constrained RESTful Environments (CoRE) Parameters Created 2012-06-08 Last Updated 2025-09-16 Available Formats [IMG] XML [IMG] HTML [IMG] Plain text Registries Included Below ??Resource Type (rt=) Link Target Attribute Values ??Interface Description (if=) Link Target Attribute Values ??CoAP Codes ??CoAP Method Codes ??CoAP Response Codes ??CoAP Option Numbers ??CoAP Content-Formats ??CoAP Signaling Codes ??CoAP Signaling Option Numbers ??OSCORE Flag Bits ??RD Parameters ??Endpoint Type (et=) RD Parameter Values ??Standard Problem Detail Keys ??Custom Problem Detail Keys ??Target Attributes Resource Type (rt=) Link Target Attribute Values Expert(s) Carsten Bormann, Jaime Jimenez, Christian Ams¨šss Reference [RFC6690] Note Registration requests should be sent to the [mailing list] described in [RFC6690]. If approved, designated experts should notify IANA within two weeks. For assistance, please contact iana@iana.org. IANA does not monitor the list. Available Formats [IMG] CSV Range Registration Procedures value starts with "core" IETF Review all other values Specification Required Value Description Reference Notes Group Configuration resource. This core.gp resource is used to query/manage the [RFC7390, Section 2.6.2] group membership of a CoAP server. core.hc HTTP-to-CoAP mapping base resource. [RFC8075, Section 5.5] core.rd Directory resource of an RD [RFC9176, Section 4.3] core.rd-ep Endpoint resource of an RD [RFC9176, Section 6] core.rd-lookup-ep Endpoint lookup of an RD [RFC9176, Section 4.3] core.rd-lookup-res Resource lookup of an RD [RFC9176, Section 4.3] oic.d.airconditioner Air Conditioner device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.airpurifier Air Purifier device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.blind Blind device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.camera Camera device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.dishwasher Dishwasher device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.door Door device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.dryer Dryer device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.fan Fan device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.garagedoor Garage Door device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.light Light device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.multifunctionprinter Printer Multi-Function device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.oven Oven device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.printer Printer device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.receiver Receiver device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.refrigerator Refrigerator device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.robotcleaner Robot Cleaner device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.scanner Scanner device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.securitypanel Security Panel device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.sensor Generic Sensor device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.smartlock Smart Lock device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.smartplug Smart Plug device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.switch Switch device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.thermostat Thermostat device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.tv Television device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] oic.d.washer Washer device. This is a clothes [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] washer device. oic.d.watervalve Water Valve device [OIC_SmartHomeDevice_Specification_v1.1.0 section 10.1] Air Flow resource. This resource oic.r.airflow describes the properties associated [OIC_Resource_Type_Specification_v1.1.0 section 6.1] with air flow. Air Flow Control resource. This resource describes the attributes oic.r.airflowcontrol associated with control of air flow, [OIC_Resource_Type_Specification_v1.1.0 section 6.2] for example as modelled by a Thermostat (fan), Room A/C or other device. Altimeter resource. This resource oic.r.altimeter describes properties associated with [OIC_Resource_Type_Specification_v1.1.0 section 6.58] the height of the position. Audio Controls resource. This oic.r.audio resource defines basic audio control [OIC_Resource_Type_Specification_v1.1.0 section 6.25] functions. Auto Focus resource. This resource oic.r.autofocus describes whether an auto focus [OIC_Resource_Type_Specification_v1.1.0 section 6.26] feature is on or off. Automatic Document Feeder resource. oic.r.automaticdocumentfeeder This resource describes the state of [OIC_Resource_Type_Specification_v1.1.0 section 6.27] an automatic document feeder, typically used with a scanner. Button Switch resource. This oic.r.button resource describes the operation of [OIC_Resource_Type_Specification_v1.1.0 section 6.28] a button style switch. Clock resource. This resource oic.r.clock describes the properties associated [OIC_Resource_Type_Specification_v1.1.0 section 6.59] with clock and time. Auto White Balance resource. This oic.r.colour.autowhitebalance resource describes whether an auto [OIC_Resource_Type_Specification_v1.1.0 section 6.31] balance feature is on or off. Colour Chroma resource. This oic.r.colour.chroma resource describes the colour using [OIC_Resource_Type_Specification_v1.1.0 section 6.6] chroma conventions. Colour RGB resource. This resource oic.r.colour.rgb specifies the actual colour in the [OIC_Resource_Type_Specification_v1.1.0 section 6.7] RGB space. Colour Saturation resource. This oic.r.colour.saturation resource describes a Colour [OIC_Resource_Type_Specification_v1.1.0 section 6.32] saturation value. oic.r.door Door resource. This resource [OIC_Resource_Type_Specification_v1.1.0 section 6.9] describes the open state of a door. Battery resource. This resource oic.r.energy.battery represents the charge state of a [OIC_Resource_Type_Specification_v1.1.0 section 6.3] battery. Energy Consumption resource. This resource describes the energy oic.r.energy.consumption consumed by the device since power [OIC_Resource_Type_Specification_v1.1.0 section 6.10] up and the instantaneous power draw of the device at the time the resource was queried. Demand Response Load Control (DRLC) oic.r.energy.drlc resource. This resource describes [OIC_Resource_Type_Specification_v1.1.0 section 6.34] any to be applied or currently being applied DRLC signal. Energy Overload/Circuit Breaker resource. This resource describes oic.r.energy.overload whether an energy overload [OIC_Resource_Type_Specification_v1.1.0 section 6.35] detector/circuit breaker has been tripped. Energy Usage resource. This resource oic.r.energy.usage describes a cumulative time-based [OIC_Resource_Type_Specification_v1.1.0 section 6.11] energy usage query. Height resource. This resource oic.r.height describes the properties associated [OIC_Resource_Type_Specification_v1.1.0 section 6.61] with height of an object's physical size. Humidity resource. This resource oic.r.humidity describes a sensed or desired [OIC_Resource_Type_Specification_v1.1.0 section 6.12] humidity. Ice Maker resource. This resource oic.r.icemaker describes the operational state of [OIC_Resource_Type_Specification_v1.1.0 section 6.13] an ice maker. Brightness resource. This resource oic.r.light.brightness describes the brightness of a light [OIC_Resource_Type_Specification_v1.1.0 section 6.5] or lamp. oic.r.light.dimming Dimming resource. This resource [OIC_Resource_Type_Specification_v1.1.0 section 6.8] describes a dimming function. Ramp Time resource. This resource oic.r.light.ramptime describes the Ramp Time of a dimming [OIC_Resource_Type_Specification_v1.1.0 section 6.19] function. oic.r.lock.code Lock Code resource. This resource [OIC_Resource_Type_Specification_v1.1.0 section 6.15] describes a lock code. Lock resource. This resource oic.r.lock.status describes whether a lock is locked [OIC_Resource_Type_Specification_v1.1.0 section 6.14] or unlocked. Media resource. This resource oic.r.media specifies the media that a server [OIC_Resource_Type_Specification_v1.1.0 section 6.41] supports. Media Source Input resource. This oic.r.media.input resource provides the list of input [OIC_Resource_Type_Specification_v1.1.0 section 6.42] media sources available on the device. Media Source Output resource. This oic.r.media.output resource provides the list of output [OIC_Resource_Type_Specification_v1.1.0 section 6.43] media sources available on the device. Mode resource. This resource oic.r.mode describes the modes of operation [OIC_Resource_Type_Specification_v1.1.0 section 6.16] that a device can provide. oic.r.movement.linear Movement resource. This resource [OIC_Resource_Type_Specification_v1.1.0 section 6.54] describes linear movement. Night Mode resource. This resource oic.r.nightmode describes whether a night mode [OIC_Resource_Type_Specification_v1.1.0 section 6.45] feature is on or off. Open Level resource. This resource oic.r.openlevel describes how open or ajar an entity [OIC_Resource_Type_Specification_v1.1.0 section 6.17] such as a window, door, blind or shutter is. Operational State resource. This oic.r.operational.state resource describes the operational [OIC_Resource_Type_Specification_v1.1.0 section 6.18] and job states on a device. Pan Tilt Zoom Movement resource. oic.r.ptz This resource specifies the pan tilt [OIC_Resource_Type_Specification_v1.1.0 section 6.47] and zoom capabilities of a device. Refrigeration resource. This oic.r.refrigeration resource describes a refrigeration [OIC_Resource_Type_Specification_v1.1.0 section 6.20] function. Generic Sensor resource. This oic.r.sensor resource describes whether some [OIC_Resource_Type_Specification_v1.1.0 section 6.36] value or property or entity has been sensed or not. Acceleration Sensor resource. This oic.r.sensor.acceleration resource provides a measure of [OIC_Resource_Type_Specification_v1.1.0 section 6.53] proper acceleration (g force). Activity Count resource. This oic.r.sensor.activity.count resource specifies an activity [OIC_Resource_Type_Specification_v1.1.0 section 6.23] count. Atmospheric Pressure resource. This resource provides a measurement of oic.r.sensor.atmosphericpressure Mean Sea Level Pressure experienced [OIC_Resource_Type_Specification_v1.1.0 section 6.24] at the measuring point expressed in millibars. Carbon Dioxide Sensor resource. This oic.r.sensor.carbondioxide resource describes whether carbon [OIC_Resource_Type_Specification_v1.1.0 section 6.29] dioxide has been sensed or not. Carbon Monoxide Sensor resource. oic.r.sensor.carbonmonoxide This resource describes whether [OIC_Resource_Type_Specification_v1.1.0 section 6.30] carbon monoxide has been sensed or not. Contact Sensor resource. This oic.r.sensor.contact resource describes whether a contact [OIC_Resource_Type_Specification_v1.1.0 section 6.33] sensor has been tripped or not. Geolocation Sensor resource. This oic.r.sensor.geolocation resource describes the properties [OIC_Resource_Type_Specification_v1.1.0 section 6.60] associated with the current geolocation coordinate. Glass Break Sensor resource. This oic.r.sensor.glassbreak resource describes a glass break [OIC_Resource_Type_Specification_v1.1.0 section 6.37] sensor. Heart Rate Zone Sensor resource. oic.r.sensor.heart.zone This resource describes a measured [OIC_Resource_Type_Specification_v1.1.0 section 6.38] heart rate by the current Zone using the Zoladz method. Illuminance Sensor resource. This oic.r.sensor.illuminance resource describes an illuminance [OIC_Resource_Type_Specification_v1.1.0 section 6.39] sensor. Magnetic Field Direction resource. This resource describes the oic.r.sensor.magneticfielddirection direction of the Earth's magnetic [OIC_Resource_Type_Specification_v1.1.0 section 6.40] field at the observer's current point in space. Motion Sensor resource. This oic.r.sensor.motion resource describes whether motion [OIC_Resource_Type_Specification_v1.1.0 section 6.43] has been sensed or not. Presence Sensor resource. This oic.r.sensor.presence resource describes whether presence [OIC_Resource_Type_Specification_v1.1.0 section 6.45] has been sensed or not. UV Radiation resource. This resource oic.r.sensor.radiation.uv describes an ultraviolet radiation [OIC_Resource_Type_Specification_v1.1.0 section 6.51] measurement. Sleep Sensor resource. This resource oic.r.sensor.sleep describes whether human sleep has [OIC_Resource_Type_Specification_v1.1.0 section 6.55] been sensed or not. Smoke Sensor resource. This resource oic.r.sensor.smoke describes whether smoke has been [OIC_Resource_Type_Specification_v1.1.0 section 6.56] sensed or not. Three Axis Sensor resource. This oic.r.sensor.threeaxis resource provides a representation [OIC_Resource_Type_Specification_v1.1.0 section 6.57] of the measurement from a three-axis sensor. Touch Sensor resource. This resource oic.r.sensor.touch describes whether touch has been [OIC_Resource_Type_Specification_v1.1.0 section 6.50] sensed or not. Water Sensor resource. This resource oic.r.sensor.water describes whether water has been [OIC_Resource_Type_Specification_v1.1.0 section 6.52] sensed or not. Signal Strength resource. This resource describes the strength of a oic.r.signalstrength signal by means of Link Quality [OIC_Resource_Type_Specification_v1.1.0 section 6.48] Indicator and Received Signal Strength Indicator. Speech Synthesis resource. This resource is capable of rendering oic.r.speech.tts speech and allows a client to [OIC_Resource_Type_Specification_v1.1.0 section 6.49] provide an SSML document with text to render. Binary switch resource. This oic.r.switch.binary resource describes a binary switch [OIC_Resource_Type_Specification_v1.1.0 section 6.4] (on/off). Temperature resource. This resource oic.r.temperature describes a sensed or actuated [OIC_Resource_Type_Specification_v1.1.0 section 6.21] Temperature value. Time Period resource. This resource oic.r.time.period describes the time period over which [OIC_Resource_Type_Specification_v1.1.0 section 6.22] any additionally provided information is derived or bounded. Weight resource. This resource oic.r.weight describes the properties associated [OIC_Resource_Type_Specification_v1.1.0 section 6.62] with weight of an object. OMA LwM2M Resource. This Resource type indicates that the resource and oma.lwm2m all of its sub-resources support the [OMA-TS-LightweightM2M-V1_0] OMA Lightweight M2M protocol, i.e. contain OMA LwM2M objects and resources. bbf.usp.endpoint Endpoint of the Broadband Forum USP [https://usp.technology/specification/mtp/coap/] protocol oic.wk.col Collection resource. [OCF_Core_Specification_v1.0.0 section D.2] oic.wk.con Device Configuration resource. [OCF_Core_Specification_v1.0.0 section D.3] oic.wk.con.p Platform Configuration resource. [OCF_Core_Specification_v1.0.0 section D.4] oic.wk.d Device resource. [OCF_Core_Specification_v1.0.0 section D.5] oic.wk.mnt Maintenance resource. [OCF_Core_Specification_v1.0.0 section D.6] oic.wk.p Platform resource. [OCF_Core_Specification_v1.0.0 section D.7] oic.wk.res Discoverable Resources resource. [OCF_Core_Specification_v1.0.0 section D.9] oic.wk.scenelist Scene List resource. [OCF_Core_Specification_v1.0.0 section D.11] oic.wk.scenecollection Scene Member Collection resource. [OCF_Core_Specification_v1.0.0 section D.12] oic.wk.scenemember Scene Member resource. [OCF_Core_Specification_v1.0.0 section D.13] oic.wk.rd Resource Directory resource. [OCF_Core_Specification_v1.0.0 section D.14] oic.r.icon Icon resource. [OCF_Core_Specification_v1.0.0 section D.15] oic.wk.introspection Introspection resource. [OCF_Core_Specification_v1.0.0 section D.16] oic.r.airquality Air Quality resource. [OCF_ResourceType_Specification_v1.0.0 section 6.65] oic.r.airqualitycollection Air Quality Collection resource. [OCF_ResourceType_Specification_v1.0.0 section 6.66] oic.r.consumable Consumable resource. [OCF_ResourceType_Specification_v1.0.0 section 6.67] oic.r.consumablecollection Consumable Collection resource. [OCF_ResourceType_Specification_v1.0.0 section 6.68] oic.r.delaydefrost Delay Defrost resource. [OCF_ResourceType_Specification_v1.0.0 section 6.69] oic.r.ecomode Ecomode resource. [OCF_ResourceType_Specification_v1.0.0 section 6.70] oic.r.heatingzone Heating Zone resource. [OCF_ResourceType_Specification_v1.0.0 section 6.71] oic.r.heatingzonecollection Heating Zone Collection resource. [OCF_ResourceType_Specification_v1.0.0 section 6.72] oic.r.mediasourcelist Media Source List resource. [OCF_ResourceType_Specification_v1.0.0 section 6.43] oic.r.media.input Input Media Source List resource. [OCF_ResourceType_Specification_v1.0.0 section 6.44] oic.r.media.output Output Media Source List resource. [OCF_ResourceType_Specification_v1.0.0 section 6.45] oic.r.movement.ptz Physical Pan Tilt Zoom resource. [OCF_ResourceType_Specification_v1.0.0 section 6.49] oic.r.image.ptz Image Pan Tilt Zoom resource. [OCF_ResourceType_Specification_v1.0.0 section 6.49] oic.r.selectablelevels Selectable Levels resource. [OCF_ResourceType_Specification_v1.0.0 section 6.73] oic.r.value.conditional Value Conditional resource. [OCF_ResourceType_Specification_v1.0.0 section 6.74] oic.d.airqualitymonitor Air Quality Monitor device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.washerdryer Washer Dryer (Laundry) device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.cookerhood Cooker Hood device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.cooktop Cooktop device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.dehumidifier Dehumidifier device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.freezer Freezer device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.foodprobe Food Probe device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.humidifier Humidifier device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.d.stb Set Top Box device [OCF_SmartHome_Device_Specification_v1.0.0 section 9.1] oic.wk.nmon Network Monitoring resource. [OCF_Core_Specification_v2.0.1 section D.16] oic.wk.atomicmeasurement Atomic Measurement resource. [OCF_Core_Specification_v2.0.1 section D.17] oic.d.bridge Bridge device. [OCF_Bridging_Specification_v2.0.1 section 8] oic.d.virtual Virtual device. [OCF_Bridging_Specification_v2.0.1 section 8] oic.r.securemode Secure Mode resource. [OCF_Bridging_Specification_v2.0.1 section 9.2] oic.r.alljoynobject Alljoyn Object resource. [OCF_Bridging_Specification_v2.0.1 section 9.3] oic.r.easysetup Easy Setup resource. [OCF_Core_Specification_Extension_Wi-Fi_Easy_Setup_v2.0.1 section A.2] oic.r.wificonf Wi-Fi Configuration resource. [OCF_Core_Specification_Extension_Wi-Fi_Easy_Setup_v2.0.1 section A.3] oic.r.devconf Device Configuration resource. [OCF_Core_Specification_Extension_Wi-Fi_Easy_Setup_v2.0.1 section A.4] oic.r.coapcloudconf CoAP Cloud Configuration. [OCF_Core_Specification_Extension_CoAP_Native_Cloud_v2.0.1 section A.2] oic.r.colour.csc Colour Space Coordinates resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.75] oic.r.colour.colourtemperature Colour Temperature resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.76] oic.r.colour.hs Colour Hue Saturation resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.77] oic.r.batterymaterial Battery Material resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.78] oic.r.brewing Brewing resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.79] oic.r.energy.electrical Electrical Energy resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.80] oic.r.energy.generation Energy Generation resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.81] oic.r.foaming Foaming resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.82] oic.r.grinder Grinder resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.83] oic.r.liquid.level Liquid Level resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.84] oic.r.vehicle.connector Electric Vehicle Connector resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.85] oic.r.time.stamp Time Stamp resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.86] oic.r.printer.3d 3D Printer resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.87] oic.r.blood.pressure Blood Pressure resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.88] oic.r.bloodpressuremonitor-am Blood Pressure Monitor Atomic [OCF_Resource_Type_Specification_v2.0.1 section 6.89] Measurement resource. oic.r.bmi Body Mass Index (BMI) resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.90] oic.r.body.fat Body Fat resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.91] oic.r.body.ffm Body Fat Free Mass resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.92] oic.r.body.location Body Location resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.93] oic.r.body.location.temperature Body Location Temperature resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.94] oic.r.bodyscale-am Body Scale Atomic Measurement [OCF_Resource_Type_Specification_v2.0.1 section 6.95] resource. oic.r.body.slm Body Soft Lean Mass resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.96] oic.r.bodythermometer-am Body Thermometer Atomic Measurement [OCF_Resource_Type_Specification_v2.0.1 section 6.97] resource. oic.r.body.water Body Water resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.98] oic.r.glucose Glucose resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.99] oic.r.glucose.carb Glucose Meter Complex Carbohydrates [OCF_Resource_Type_Specification_v2.0.1 section 6.100] resource. oic.r.glucose.exercise Glucose Meter Exercise resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.101] oic.r.glucose.hba1c Glucose Meter HbA1c resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.102] oic.r.glucose.health Glucose Meter Context Health [OCF_Resource_Type_Specification_v2.0.1 section 6.103] resource. oic.r.glucose.meal Glucose Meter Context Meal resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.104] oic.r.glucose.medication Glucose Meter Context Medication [OCF_Resource_Type_Specification_v2.0.1 section 6.105] resource. oic.r.glucosemeter-am Glucose Meter Atomic Measurement [OCF_Resource_Type_Specification_v2.0.1 section 6.106] resource. oic.r.glucose.samplelocation Glucose Meter Context Sample [OCF_Resource_Type_Specification_v2.0.1 section 6.107] Location resource. oic.r.glucose.tester Glucose Meter Context Tester [OCF_Resource_Type_Specification_v2.0.1 section 6.108] resource. oic.r.orfid.station Optical RFID Station resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.109] oic.r.orfid.tag Optical RFID Tag resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.110] oic.r.powersource Power Source resource [OCF_Resource_Type_Specification_v2.0.1 section 6.111] oic.r.printer.queue Print Queue resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.112] oic.r.pulserate Pulse Rate resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.113] oic.r.sensor.props Sensor Properties resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.114] oic.r.userid User ID resource. [OCF_Resource_Type_Specification_v2.0.1 section 6.115] oic.d.waterheater Water Heater device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.furnace Furnace device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.pump Pump device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.condensingunit Condensing Unit device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.condenser Condenser device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.hvac HVAC device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.lightingcontrol Lighting Controls device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.icemachine Ice Machine device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.range Range device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.steamcloset Steam Closet device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.audiosystem Audio System device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.avplayer AV Player device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.desktoppc Desktop PC device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.notebookpc Notebook PC device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.server Server device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.pc Computer device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.datastorageunit Data Storage Unit device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.display Display device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.portableelectronics Portable Electronics device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.gameconsole Game Console device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.3dprinter 3D Printer device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.musicalinstrument Musical Instrument device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.networking Networking Equipment device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.handset Handset device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.telephonydevice Telephony device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.speaker Active Speaker device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.smallelectrical Electronics device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.aircompressor Air Compressor device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.bathroomdevice Bathroom General device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.batterycharger Battery Charger device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.businessequipment Business Equipment device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.portablestove Portable Stove device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.exercisemachine Exercise Machine device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.hvacportable Portable HVAC device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.orfid Optical Augmented RFID Reader [OCF_Device_Specification_v2.0.1 section A.2] device. oic.d.coffeemachine Coffee Machine device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.grinder Grinder device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.kettle Kettle device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.lightdecorative Decorative Lighting device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.lightemergency Emergency Lighting device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.microwave Microwave Oven device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.vendingmachine Vending Machine device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.waterdispenser Water Dispenser device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.battery Battery device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.window Window device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.fireplace Fireplace device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.energygenerator Energy Generator device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.electricmeter Electric Meter device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.electricvehiclecharger Electric Vehicle Charger device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.fitnessdevice Fitness device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.bloodpressuremonitor Blood Pressure Monitor device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.bodythermometer Body Thermometer device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.medicaldevice Media device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.glucosemeter Glucose Meter device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.bodyscale Body Scale device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.personalhealthdevice Personal Health device. [OCF_Device_Specification_v2.0.1 section A.2] oic.d.unknown Other device. [OCF_Device_Specification_v2.0.1 section A.2] oic.r.doxm Device Owner Transfer resource [OCF_Security_Specification_v2.0.1 section 13.1] oic.r.cred Credential resource [OCF_Security_Specification_v2.0.1 section 13.2] oic.r.crl Certificate Revocation List resource [OCF_Security_Specification_v2.0.1 section 13.3] oic.r.acl Access Control List resource [OCF_Security_Specification_v2.0.1 section 13.4] oic.r.acl2 Access Control List 2 resource [OCF_Security_Specification_v2.0.1 section 13.4] oic.r.amacl Access Manager ACL resource [OCF_Security_Specification_v2.0.1 section 13.5] oic.r.sacl Signed ACL resource [OCF_Security_Specification_v2.0.1 section 13.6] oic.r.pstat Provisioning Status resource [OCF_Security_Specification_v2.0.1 section 13.7] oic.r.csr Certificate Signing Request resource [OCF_Security_Specification_v2.0.1 section 13.8] oic.r.roles Roles resource [OCF_Security_Specification_v2.0.1 section 13.9] oic.r.account Account resource [OCF_Security_Specification_v2.0.1 section 13.10] oic.r.session Account Session resource [OCF_Security_Specification_v2.0.1 section 13.11] oic.r.tokenrefresh Account Token Refresh resource [OCF_Security_Specification_v2.0.1 section 13.12] fa.cs Resource type for the Fairhair [Fairhair Alliance specification section 5.2.2] common services Resource type for the Fairhair fa.rd-conf resource that configures and manages [Fairhair Alliance specification section 4.6.1.4] information about RDs on FA devices fa.lnk Resource type for the Fairhair [Fairhair Alliance specification section 5.5.2] Linkage resource Resource type for the Fairhair fa.rd-id resource that Identifies the [Fairhair Alliance specification section 4.6.1.5] resource which configures and manages RD identity information oic.d.activitytracker Activity Tracker device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.ams Access Management Service. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.cgm Continuous Glucose Meter device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.circuitbreaker Circuit Breaker device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.cms Credential Management Service. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.cyclingcadencesensor Cycling cadence sensor device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.cyclingpowermeter Cycling power meter device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.cyclingspeedsensor Cycling speed sensor device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.dots Device Ownership Transfer Service. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.energymonitor Energy Monitor device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.heartratemonitor Heart Rate Monitor device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.inverter Inverter device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.pulseoximeter Pulse Oximeter device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.pvarraysystem Photovoltaic Array System device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.sleepmonitor Sleep Monitor device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.d.waterpurifier Water Purifier device. [OCF_Device_Specification_v2.0.5 clause A.2] oic.r.activity Activity resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.127] oic.r.activitytracker-am Activity tracker measurement with [OCF_Resource_Type_Specification_v2.0.5 clause 6.128] activity, heart rate, etc. oic.r.alarm Alarm resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.129] oic.r.alert Alerts resource type [OCF_Core_Optional_Specification_v2.0.5 clause A.10] oic.r.alertcollection Alerts Collection resource type [OCF_Core_Optional_Specification_v2.0.5 clause A.11] oic.r.cadence Cadence resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.144] oic.r.calorificvalue Energy associated with the [OCF_Resource_Type_Specification_v2.0.5 clause 6.116] consumption of various fuels. oic.r.cgm.calibrate Continuous Glucose Meter calibration [OCF_Resource_Type_Specification_v2.0.5 clause 6.131] resource. oic.r.cgm.samplinginterval Continuous Glucose Meter sampling [OCF_Resource_Type_Specification_v2.0.5 clause 6.132] interval resource. oic.r.cgm.sensor Continuous Glucose Meter sensor [OCF_Resource_Type_Specification_v2.0.5 clause 6.133] resource. oic.r.cgm.status Continuous Glucose Meter status [OCF_Resource_Type_Specification_v2.0.5 clause 6.134] resource. oic.r.cgm.threshold Continuous Glucose Meter threshold [OCF_Resource_Type_Specification_v2.0.5 clause 6.135] resource. oic.r.cgm-am Resource for glucose, sensor, time, [OCF_Resource_Type_Specification_v2.0.5 clause 6.130] and user data. oic.r.circuitbreaker Circuit Breaker resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.145] oic.r.conversionfactor Property used in calculating [OCF_Resource_Type_Specification_v2.0.5 clause 6.117] conversions. oic.r.cyclingpower Cycling power resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.146] oic.r.gas.consumption Energy values associated with gas [OCF_Resource_Type_Specification_v2.0.5 clause 6.118] consumption. oic.r.gas.usage Cumulative time-based gas usage [OCF_Resource_Type_Specification_v2.0.5 clause 6.119] query. oic.r.heartrate Heart rate resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.136] oic.r.heartratemonitor-am Resource for heart rate, time, and [OCF_Resource_Type_Specification_v2.0.5 clause 6.137] user data. Resource that includes iaszoneinfo, oic.r.iaszone battery, and power source [OCF_Resource_Type_Specification_v2.0.5 clause 6.125] information oic.r.iaszoneinfo Intruder Alert System (IAS) Zone [OCF_Resource_Type_Specification_v2.0.5 clause 6.124] information resource oic.r.impactsensor Impact sensor resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.120] oic.r.inverter Inverter resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.147] oic.r.keypadchar Character keypad resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.121] oic.r.opaquedata Opaque data transferred and [OCF_Resource_Type_Specification_v2.0.5 clause 6.122] uninterpretable at endpoints. oic.r.pulsatilecharacteristic Pulsatile characteristic of the [OCF_Resource_Type_Specification_v2.0.5 clause 6.138] pulsative wave of a pulse oximeter. oic.r.pulsatileoccurrence Pulsatile occurrence of a pulse [OCF_Resource_Type_Specification_v2.0.5 clause 6.139] oximeter. oic.r.pulseoximeter-am Resource for SpO2, pulse data, [OCF_Resource_Type_Specification_v2.0.5 clause 6.140] observed time, and user data. oic.r.pvconnectionterminal Photovoltaic connection terminal [OCF_Resource_Type_Specification_v2.0.5 clause 6.148] resource. oic.r.sleep Sleep resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.141] oic.r.sleepmonitor-am Resource for sleep stages and sleep [OCF_Resource_Type_Specification_v2.0.5 clause 6.142] score data. oic.r.softwareupdate Software Update resource type [OCF_Core_Optional_Specification_v2.0.5 clause A.12] oic.r.sp Security Profile [OCF_Security_Specification_v2.0.5 clause 14.8] oic.r.speed Speed resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.149] oic.r.spo2 Blood oxygen saturation level [OCF_Resource_Type_Specification_v2.0.5 clause 6.143] resource. oic.r.torque Torque resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.150] oic.r.userid User identification resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.123] oic.r.vodlist Virtual OCF Device resource. [OCF_Bridging_Specification_v2.0.5 clause 5.5] oic.r.waterinfo Water information resource. [OCF_Resource_Type_Specification_v2.0.5 clause 6.151] oic.r.windowcovering Configurable window covering [OCF_Resource_Type_Specification_v2.0.5 clause 6.126] resource ace.est.crts This resource depicts the support of [RFC9148] EST GET cacerts. ace.est.sen This resource depicts the support of [RFC9148] EST simple enroll. ace.est.sren This resource depicts the support of [RFC9148] EST simple reenroll. ace.est.att This resource depicts the support of [RFC9148] EST GET CSR attributes. This resource depicts the support of ace.est.skg EST server-side key generation with [RFC9148] the returned certificate in a PKCS #7 container. This resource depicts the support of ace.est.skc EST server-side key generation with [RFC9148] the returned certificate in application/pkix-cert format. oic.d.bodycompositionanalyser Body Composition Analyser device [OCF Device Specification v2.1.2 clause A.2] oic.d.indoorgarden Indoor Garden device [OCF Device Specification v2.1.2 clause A.2] oic.d.mattress Mattress device [OCF Device Specification v2.1.2 clause A.2] oic.d.muscleoxygenmonitor Muscle Oxygen Monitor device [OCF Device Specification v2.1.2 clause A.2] oic.r.ael Auditable Event List [OCF Security Specification v2.1.2 clause C.9] oic.r.bodycompositionanalyser-am Body Composition Analyser resource [OCF Resource Type Specification v2.1.2 clause 6.155] oic.r.deodorization Deodorization resource [OCF Resource Type Specification v2.1.2 clause 6.152] oic.r.hvac.capacity HVAC Capacity resource [OCF Resource Type Specification v2.1.2 clause 6.157] oic.r.keycardswitch Keycard Switch resource [OCF Resource Type Specification v2.1.2 clause 6.153] oic.r.media.audio Media (Audio) resource [OCF Resource Type Specification v2.1.2 clause 6.158] oic.r.media.core Media (Core) resource [OCF Resource Type Specification v2.1.2 clause 6.159] oic.r.media.image Media (Image) resource [OCF Resource Type Specification v2.1.2 clause 6.160] oic.r.media.text Media (Text) resource [OCF Resource Type Specification v2.1.2 clause 6.161] oic.r.media.video Media (Video) resource [OCF Resource Type Specification v2.1.2 clause 6.162] oic.r.muscleoxygensaturation Muscle Oxygen Saturation resource [OCF Resource Type Specification v2.1.2 clause 6.154] oic.r.switch.fault Fault Interrupter resource [OCF Resource Type Specification v2.1.2 clause 6.156] oic.r.switch.restricted Restricted Switch resource [OCF Resource Type Specification v2.1.2 clause 6.163] oic.d.afci Arc Fault Circuit Interrupter [OCF Device Specification v2.2.0 clause A.2] oic.d.airer Airer [OCF Device Specification v2.2.0 clause A.2] oic.d.gfci Ground Fault Circuit Interrupter [OCF Device Specification v2.2.0 clause A.2] oic.r.sdi Security Domain Information [OCF Security Specification v2.2.0 clause C.10] oic.r.settings.accessibility Device Settings - Accessibility [OCF Resource Type Specification v2.2.0 clause 6.164] oic.r.settings.broadcasting Device Settings - Broadcasting [OCF Resource Type Specification v2.2.0 clause 6.165] oic.r.settings.picture Device Settings - Picture [OCF Resource Type Specification v2.2.0 clause 6.166] oic.r.settings.sound Device Settings - Sound [OCF Resource Type Specification v2.2.0 clause 6.167] oic.r.settings.support Device Settings - Support [OCF Resource Type Specification v2.2.0 clause 6.168] oic.r.settings.system Device Settings - System [OCF Resource Type Specification v2.2.0 clause 6.169] oic.r.sensor.measurement Generic Measurement Sensor [OCF_Resource_Type_Specification_v2.2.2 clause 6.170] oic.r.sensor.radiation.uva UVA Radiation [OCF_Resource_Type_Specification_v2.2.2 clause 6.171] oic.r.sensor.radiation.uvb UVB Radiation [OCF_Resource_Type_Specification_v2.2.2 clause 6.172] oic.r.colour.renderingindex Colour Rendering Index [OCF_Resource_Type_Specification_v2.2.2 clause 6.173] oic.r.sound.pressure Sound Pressure in Pascal [OCF_Resource_Type_Specification_v2.2.2 clause 6.174] oic.r.sound.pressurelevel Sound Pressure Level in dB [OCF_Resource_Type_Specification_v2.2.2 clause 6.175] oic.r.location.civic Civic Location [OCF_Resource_Type_Specification_v2.2.2 clause 6.176] ace.ai ACE-OAuth authz-info endpoint [RFC9200] resource. oic.d.acassistant A/C Assistant [OCF_Device_Specification_v2.2.4 clause A.2] oic.d.dali Light (DALI) Device [OCF_Device_Specification_v2.2.4 clause A.2] oic.d.dali.ac Light (DALI) Application Controller [OCF_Device_Specification_v2.2.4 clause A.2] oic.d.dali.bus Light (DALI) Bus [OCF_Device_Specification_v2.2.4 clause A.2] oic.d.light.smart Smart Light [OCF_Device_Specification_v2.2.4 clause A.2] oic.d.wallpad Wallpad [OCF_Device_Specification_v2.2.4 clause A.2] oic.r.remotecontrol Remote Control [OCF_Resource_Type_Specification_v2.2.4 clause 7.177] oic.r.tv.apps TV Apps [OCF_Resource_Type_Specification_v2.2.4 clause 7.178] oic.r.vendorlist Vendor List [OCF_Resource_Type_Specification_v2.2.4 clause 7.179] oic.r.dali DALI [OCF_Resource_Type_Specification_v2.2.4 clause 7.180] oic.r.dali.conf DALI Configuration [OCF_Resource_Type_Specification_v2.2.4 clause 7.181] wot.directory link to WoT Thing Description of a [Web of Things (WoT) Discovery, Section 6.4] Thing Description Directory wot.thing link to WoT Thing Description of a [Web of Things (WoT) Discovery, Section 6.4] Thing core.edhoc EDHOC resource [RFC9528] core.coap-eap CoAP-EAP resource [RFC9820] core.dns DNS over CoAP resource [RFC-ietf-core-dns-over-coap-19, Section 3] Interface Description (if=) Link Target Attribute Values Expert(s) Carsten Bormann, Jaime Jimenez, Christian Ams¨šss Reference [RFC6690] Note Registration requests should be sent to the [mailing list] described in [RFC6690]. If approved, designated experts should notify IANA within two weeks. For assistance, please contact iana@iana.org. IANA does not monitor the list. Available Formats [IMG] CSV Range Registration Procedures value starts with "core" IETF Review all other values Specification Required Value Description Reference Notes The baseline Interface defines a view into all Properties of a Resource oic.if.baseline including the Meta Properties. This Interface is used to operate on the [OIC_Core_Specification_v1.1.0 section 7.5.3] full Representation of a Resource. The 'links list' Interface provides a view into Links in a Collection oic.if.ll (Resource). Since Links represent relationships to other Resources, the [OIC_Core_Specification_v1.1.0 section 7.5.3] links list interfaces may be used to discover Resources with respect to a context. The discovery is done by retrieving Links to these Resources. The batch Interface is used to interact with a collection of Resources at oic.if.b the same time. This also removes the need for the Client to first [OIC_Core_Specification_v1.1.0 section 7.5.3] discover the Resources it is manipulating - the Server forwards the requests and aggregates the responses. The read-only Interface exposes the Properties of a Resource that may be oic.if.r 'read'. This Interface does not provide methods to update Properties or a [OIC_Core_Specification_v1.1.0 section 7.5.3] Resource and so can only be used to 'read' Property Values. The read-write Interface exposes only those Properties that may be both oic.if.rw 'read' and 'written' and provides methods to read and write the [OIC_Core_Specification_v1.1.0 section 7.5.3] Properties of a Resource. oic.if.a The actuator Interface is used to read or write the Properties of an [OIC_Core_Specification_v1.1.0 section 7.5.3] actuator Resource. oic.if.s The sensor Interface is used to read the Properties of a sensor Resource. [OIC_Core_Specification_v1.1.0 section 7.5.3] bbf.usp.c USP Controller Endpoint of the Broadband Forum USP protocol [https://usp.technology/specification/mtp/coap/] bbf.usp.a USP Agent Endpoint of the Broadband Forum USP protocol [https://usp.technology/specification/mtp/coap/] The create OCF Interface is used to create new Resources in a Collection. oic.if.create Both the Resource and the Link pointing to it are created in a single [OCF_Core_Specification_v2.0.5 clause 7.6.3.9] atomic operation. ace.groups The KDC interface at the parent resource of group-membership resources is [RFC9594, section 4.1] used to retrieve names of security groups using the ACE framework. The KDC interface at a group-membership resource is used to provision ace.group keying material and related information and policies to members of the [RFC9594, section 4.1] corresponding security group using the ACE framework. CoAP Codes Registration Procedure(s) Reserved ranges may be allocated in accordance with section 4.3 of [RFC8126]. Reference [RFC7252, Section 12.1] Available Formats [IMG] CSV Code Description Reference 0.00 Indicates an Empty message. [RFC7252, section 4.1] 0.01-0.31 Indicates a request. Values in this range are assigned by the [CoAP Method Codes] sub-registry. [RFC7252, section 12.1.1] 1.00-1.31 Reserved [RFC7252] 2.00-5.31 Indicates a response. Values in this range are assigned by the [CoAP Response Codes] sub-registry. [RFC7252, section 12.1.2] 6.00-7.31 Reserved [RFC7252] CoAP Method Codes Registration Procedure(s) IETF Review or IESG Approval Reference [RFC7252, Section 12.1.1] Available Formats [IMG] CSV Code Name Reference 0.01 GET [RFC7252] 0.02 POST [RFC7252] 0.03 PUT [RFC7252] 0.04 DELETE [RFC7252] 0.05 FETCH [RFC8132] 0.06 PATCH [RFC8132] 0.07 iPATCH [RFC8132] 0.08-0.31 Unassigned CoAP Response Codes Registration Procedure(s) IETF Review or IESG Approval Reference [RFC7252, Section 12.1.2] Available Formats [IMG] CSV Code Description Reference 2.00 Unassigned 2.01 Created [RFC7252] 2.02 Deleted [RFC7252] 2.03 Valid [RFC7252] 2.04 Changed [RFC7252] 2.05 Content [RFC7252] 2.06-2.30 Unassigned 2.31 Continue [RFC7959] 3.00-3.31 Reserved [RFC7252] 4.00 Bad Request [RFC7252] 4.01 Unauthorized [RFC7252] 4.02 Bad Option [RFC7252] 4.03 Forbidden [RFC7252] 4.04 Not Found [RFC7252] 4.05 Method Not Allowed [RFC7252] 4.06 Not Acceptable [RFC7252] 4.07 Unassigned 4.08 Request Entity Incomplete [RFC7959] 4.09 Conflict [RFC8132] 4.10-4.11 Unassigned 4.12 Precondition Failed [RFC7252] 4.13 Request Entity Too Large [RFC7252][RFC7959] 4.14 Unassigned 4.15 Unsupported Content-Format [RFC7252] 4.16-4.21 Unassigned 4.22 Unprocessable Entity [RFC8132] 4.23-4.28 Unassigned 4.29 Too Many Requests [RFC8516] 4.30-4.31 Unassigned 5.00 Internal Server Error [RFC7252] 5.01 Not Implemented [RFC7252] 5.02 Bad Gateway [RFC7252] 5.03 Service Unavailable [RFC7252] 5.04 Gateway Timeout [RFC7252] 5.05 Proxying Not Supported [RFC7252] 5.06-5.07 Unassigned 5.08 Hop Limit Reached [RFC8768] 5.09-5.31 Unassigned CoAP Option Numbers Expert(s) Bilhanan Silverajan (primary), Klaus Hartke (secondary), Carsten Bormann (secondary), Jaime Jimenez (secondary), Alexander Pelov (secondary) Reference [RFC7252, Section 12.2] Available Formats [IMG] CSV Range Registration Procedures 0-255 IETF Review or IESG Approval 256-2047 Specification Required 2048-64999 Expert Review 65000-65535 Experimental use (no operational use) Number Name Reference 0 Reserved [RFC7252] 1 If-Match [RFC7252][RFC8613] 2 Unassigned 3 Uri-Host [RFC7252][RFC8613] 4 ETag [RFC7252][RFC8613] 5 If-None-Match [RFC7252][RFC8613] 6 Observe [RFC7641][RFC8613] 7 Uri-Port [RFC7252][RFC8613] 8 Location-Path [RFC7252][RFC8613] 9 OSCORE [RFC8613] 10 Unassigned 11 Uri-Path [RFC7252][RFC8613] 12 Content-Format [RFC7252][RFC8613] 13 Unassigned 14 Max-Age [RFC7252][RFC8516][RFC8613] 15 Uri-Query [RFC7252][RFC8613] 16 Hop-Limit [RFC8768] 17 Accept [RFC7252][RFC8613] 18 Unassigned 19 Q-Block1 [RFC9177] 20 Location-Query [RFC7252][RFC8613] 21 EDHOC [RFC9668] 22 Unassigned 23 Block2 [RFC7959][RFC8323][RFC8613] 24-26 Unassigned 27 Block1 [RFC7959][RFC8323][RFC8613] 28 Size2 [RFC7959][RFC8613] 29-30 Unassigned 31 Q-Block2 [RFC9177] 32-34 Unassigned 35 Proxy-Uri [RFC7252][RFC8613] 36-38 Unassigned 39 Proxy-Scheme [RFC7252][RFC8613] 40-59 Unassigned 60 Size1 [RFC7252][RFC8613] 61-127 Unassigned 128 Reserved [RFC7252] 129-131 Unassigned 132 Reserved [RFC7252] 133-135 Unassigned 136 Reserved [RFC7252] 137-139 Unassigned 140 Reserved [RFC7252] 141-251 Unassigned 252 Echo [RFC9175] 253-257 Unassigned 258 No-Response [RFC7967][RFC8613] 259-291 Unassigned 292 Request-Tag [RFC9175] 293-2048 Unassigned 2049 OCF-Accept-Content-Format-Version [Michael_Koster] 2050-2052 Unassigned 2053 OCF-Content-Format-Version [Michael_Koster] 2054 Unassigned 2055 SCP82-Params [GPC_SPE_207] 2056-64999 Unassigned 65000-65535 Reserved for Experimental Use [RFC7252] CoAP Content-Formats Expert(s) Esko Dijk (primary), Klaus Hartke (secondary), Carsten Bormann (secondary), Jaime Jimenez (secondary), Alexander Pelov (secondary) Reference [RFC7252, Section 12.3][RFC Errata 4954][RFC-ietf-core-cf-reg-update-09] Note As per [RFC-ietf-core-cf-reg-update-09], temporary registrations within the 0-255 range are approved by Designated Experts. These registrations are not subject to the formal [RFC7120] renewal process. Available Formats [IMG] CSV Range Registration Procedures Note 0-255 Expert Review Review procedure described in [RFC-ietf-core-cf-reg-update-09, Section 4.1.3.]. 256-9999 IETF Review with Expert Review or IESG Review procedure described in [RFC-ietf-core-cf-reg-update-09, Section 4.1.3.]. Approval with Expert Review 10000-19999 Expert Review Review procedure described in [RFC-ietf-core-cf-reg-update-09, Section 4.1.3.]. FCFS is allowed if the registration has no parameters, the registration has an empty Content 20000-32999 First Come First Served Coding, the Media Type is not yet used in this registry, and the Media Type is registered (or approved for registration) in the [Media Types] registry. 33000-64997 Expert Review Review procedure described in [RFC-ietf-core-cf-reg-update-09, Section 4.1.3.]. 64998-64999 Reserved for Documentation 65000-65535 Experimental Use No operational use Content Type Content Media Type ID Reference Coding text/plain; charset=utf-8 [text/plain] 0 [RFC2046][RFC3676][RFC5147] Unassigned 1-15 application/cose; cose-type="cose-encrypt0" [application/cose] 16 [RFC9052] application/cose; cose-type="cose-mac0" [application/cose] 17 [RFC9052] application/cose; cose-type="cose-sign1" [application/cose] 18 [RFC9052] application/ace+cbor [application/ace+cbor] 19 [RFC9200] Unassigned 20 image/gif [image/gif] 21 [https://www.w3.org/Graphics/GIF/spec-gif89a.txt] image/jpeg [image/jpeg] 22 [ISO/IEC 10918-5] image/png [image/png] 23 [PNG] Unassigned 24-39 application/link-format [application/link-format] 40 [RFC6690] application/xml [application/xml] 41 [RFC3023] application/octet-stream [application/octet-stream] 42 [RFC2045][RFC2046] Unassigned 43-46 application/exi [application/exi] 47 ["Efficient XML Interchange (EXI) Format 1.0 (Second Edition)", February 2014] Unassigned 48-49 application/json [application/json] 50 [RFC8259] application/json-patch+json [application/json-patch+json] 51 [RFC6902] application/merge-patch+json [application/merge-patch+json] 52 [RFC7396] Unassigned 53-59 application/cbor [application/cbor] 60 [RFC8949] application/cwt [application/cwt] 61 [RFC8392] application/multipart-core [application/multipart-core] 62 [RFC8710] application/cbor-seq [application/cbor-seq] 63 [RFC8742] application/edhoc+cbor-seq [application/edhoc+cbor-seq] 64 [RFC9528] application/cid-edhoc+cbor-seq [application/cid-edhoc+cbor-seq] 65 [RFC9528] Unassigned 66-95 application/cose; cose-type="cose-encrypt" [application/cose] 96 [RFC9052] application/cose; cose-type="cose-mac" [application/cose] 97 [RFC9052] application/cose; cose-type="cose-sign" [application/cose] 98 [RFC9052] Unassigned 99-100 application/cose-key [application/cose-key] 101 [RFC9052] application/cose-key-set [application/cose-key-set] 102 [RFC9052] Unassigned 103-109 application/senml+json [application/senml+json] 110 [RFC8428] application/sensml+json [application/sensml+json] 111 [RFC8428] application/senml+cbor [application/senml+cbor] 112 [RFC8428] application/sensml+cbor [application/sensml+cbor] 113 [RFC8428] application/senml-exi [application/senml-exi] 114 [RFC8428] application/sensml-exi [application/sensml-exi] 115 [RFC8428] Unassigned 116-139 application/yang-data+cbor; id=sid [application/yang-data+cbor] 140 [RFC9254] Unassigned 141-255 application/coap-group+json [application/coap-group+json] 256 [RFC7390] application/concise-problem-details+cbor [application/concise-problem-details+cbor] 257 [RFC9290] application/swid+cbor [application/swid+cbor] 258 [RFC9393] application/pkixcmp [application/pkixcmp] 259 [RFC9482][RFC9811] application/yang-sid+json [application/yang-sid+json] 260 [RFC9595] application/ace-groupcomm+cbor [application/ace-groupcomm+cbor] 261 [RFC9594] application/ace-trl+cbor [application/ace-trl+cbor] 262 [RFC9770] application/eat+cwt [application/eat+cwt] 263 [RFC9782] application/eat+jwt [application/eat+jwt] 264 [RFC9782] application/eat-bun+cbor [application/eat-bun+cbor] 265 [RFC9782] application/eat-bun+json [application/eat-bun+json] 266 [RFC9782] application/eat-ucs+cbor [application/eat-ucs+cbor] 267 [RFC9782] application/eat-ucs+json [application/eat-ucs+json] 268 [RFC9782] application/coap-eap [application/coap-eap] 269 [RFC9820] Unassigned 270 application/dots+cbor [application/dots+cbor] 271 [RFC9132] application/missing-blocks+cbor-seq [application/missing-blocks+cbor-seq] 272 [RFC9177] Unassigned 273-279 application/pkcs7-mime; [application/pkcs7-mime] 280 [RFC7030][RFC8551][RFC9148] smime-type=server-generated-key application/pkcs7-mime; smime-type=certs-only [application/pkcs7-mime] 281 [RFC8551][RFC9148] Unassigned 282-283 application/pkcs8 [application/pkcs8] 284 [RFC5958][RFC8551][RFC9148] application/csrattrs [application/csrattrs] 285 [RFC7030][RFC9148] application/pkcs10 [application/pkcs10] 286 [RFC5967][RFC8551][RFC9148] application/pkix-cert [application/pkix-cert] 287 [RFC2585][RFC9148] Unassigned 288-289 application/aif+cbor [application/aif+cbor] 290 [RFC9237] application/aif+json [application/aif+json] 291 [RFC9237] Unassigned 292-309 application/senml+xml [application/senml+xml] 310 [RFC8428] application/sensml+xml [application/sensml+xml] 311 [RFC8428] Unassigned 312-319 application/senml-etch+json [application/senml-etch+json] 320 [RFC8790] Unassigned 321 application/senml-etch+cbor [application/senml-etch+cbor] 322 [RFC8790] Unassigned 323-339 application/yang-data+cbor [application/yang-data+cbor] 340 [RFC9254] application/yang-data+cbor; id=name [application/yang-data+cbor] 341 [RFC9254] Unassigned 342-431 application/td+json [application/td+json] 432 ["Web of Things (WoT) Thing Description 1.1", April 2022] application/tm+json [application/tm+json] 433 ["Web of Things (WoT) Thing Description 1.1", April 2022] application/sdf+json [application/sdf+json] 434 [RFC-ietf-asdf-sdf-23] Unassigned 435-552 application/dns-message [application/dns-message] 553 [RFC8484][RFC-ietf-core-dns-over-coap-19, Section 4.1] Unassigned 554-600 application/uccs+cbor [application/uccs+cbor] 601 [RFC9781, Section 6.4] Unassigned 602-835 application/voucher+cose (TEMPORARY - registered 2022-04-12, extension registered 2025-03-07, expires [https://www.iana.org/assignments/provisional-standard-media-types] 836 [draft-ietf-anima-constrained-voucher-23] 2026-04-12) Unassigned 837-1541 Reserved, do not use 1542-1543 [OMA-TS-LightweightM2M-V1_0] Unassigned 1544-9999 application/vnd.ocf+cbor [application/vnd.ocf+cbor] 10000 [Michael_Koster] application/oscore [application/oscore] 10001 [RFC8613] application/javascript [application/javascript] 10002 [RFC4329] application/eat+cwt; [application/eat+cwt] 10003 [RFC9783] eat_profile="tag:psacertified.org,2023:psa#tfm" application/eat+cwt; [application/eat+cwt] 10004 [RFC9783] eat_profile="tag:psacertified.org,2019:psa#legacy" application/eat+cwt; [application/eat+cwt] 10005 [RFC9782][draft-cds-rats-intel-corim-profile-05] eat_profile=2.16.840.1.113741.1.16.1 application/vnd.oms.cellular-cose-content+cbor [application/vnd.oms.cellular-cose-content+cbor] 10006 [OMS-Group e. V.] Unassigned 10007-10569 application/toc+cbor [application/toc+cbor] 10570 [CE-Binding, Section 6.3.1] application/ce+cbor [application/ce+cbor] 10571 [CE-Binding, Section 6.3.2] application/toc+cbor;profile=2.16.840.1.113741.1.16.1 [application/toc+cbor] 10572 [TCG DICE Concise Evidence Binding for SPDM][draft-cds-rats-intel-corim-profile-05] application/ce+cbor;profile=2.16.840.1.113741.1.16.1 [application/ce+cbor] 10573 [TCG DICE Concise Evidence Binding for SPDM][draft-cds-rats-intel-corim-profile-05] Unassigned 10574-11049 application/json deflate [application/json] 11050 [RFC8259][RFC9110, Section 8.4.1.2] Unassigned 11051-11059 application/cbor deflate [application/cbor] 11060 [RFC8949][RFC9110, Section 8.4.1.2] Unassigned 11061-11541 application/vnd.oma.lwm2m+tlv [application/vnd.oma.lwm2m+tlv] 11542 [OMA-TS-LightweightM2M-V1_0] application/vnd.oma.lwm2m+json [application/vnd.oma.lwm2m+json] 11543 [OMA-TS-LightweightM2M-V1_0] application/vnd.oma.lwm2m+cbor [application/vnd.oma.lwm2m+cbor] 11544 [OMA-TS-LightweightM2M-V1_2] Unassigned 11545-11999 text/plain;charset=utf-8 zstd [text/plain] 12000 [Benjamin_Valentin] Unassigned 12001-12040 application/xml zstd [application/xml] 12041 [Benjamin_Valentin] Unassigned 12042-12049 application/json zstd [application/json] 12050 [Benjamin_Valentin] Unassigned 12051-19999 text/css [text/css] 20000 [RFC2318] Unassigned 20001-29999 image/svg+xml [image/svg+xml] 30000 [https://www.w3.org/TR/SVG/mimereg.html] Unassigned 30001-64997 Reserved for Documentation 64998-64999 [RFC-ietf-core-cf-reg-update-09] Reserved for Experimental Use 65000-65535 [RFC7252] CoAP Signaling Codes Registration Procedure(s) IETF Review or IESG Approval Reference [RFC8323] Available Formats [IMG] CSV Code Name Reference 7.00 Unassigned 7.01 CSM [RFC8323] 7.02 Ping [RFC8323] 7.03 Pong [RFC8323] 7.04 Release [RFC8323] 7.05 Abort [RFC8323] 7.06-7.31 Unassigned CoAP Signaling Option Numbers Expert(s) Bilhanan Silverajan (primary), Klaus Hartke (secondary), Alexander Pelov (secondary) Reference [RFC8323] Available Formats [IMG] CSV Range Registration Procedures Note 0-255 IETF Review or IESG Approval Range applies to Option Number field 256-2047 Specification Required Range applies to Option Number field 2048-64999 Expert Review Range applies to Option Number field 65000-65535 Experimental use (no operational use) Range applies to Option Number field Applies to Number Name Reference 7.01 2 Max-Message-Size [RFC8323] 7.01 4 Block-Wise-Transfer [RFC8323] 7.01 6 Extended-Token-Length [RFC8974] 7.02, 7.03 2 Custody [RFC8323] 7.04 2 Alternative-Address [RFC8323] 7.04 4 Hold-Off [RFC8323] 7.05 2 Bad-CSM-Option [RFC8323] 7.xx (all) 9 OSCORE [RFC8613] OSCORE Flag Bits Registration Procedure(s) Expert Review Expert(s) Francesca Palombini, G?ran Selander, Christian Ams¨šss Reference [RFC8613] Available Formats [IMG] CSV Bit Position Name Description Reference 0 Reserved [RFC8613] 1 Reserved [RFC8613] 2 Group Flag For using a Group OSCORE Security Context, set to 1 if the message is [draft-ietf-core-oscore-groupcomm-14] protected with the group mode 3 Kid Context Flag Set to 1 if kid context is present in the compressed COSE object [RFC8613] 4 Kid Flag Set to 1 if kid is present in the compressed COSE object [RFC8613] 5-7 Partial IV Length Encodes the Partial IV length; can have value 0 to 5 [RFC8613] 8 Extension-2 Flag Set to 1 if the OSCORE Option specifies a third byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 16-23 9-14 Unassigned 15 Nonce Flag Set to 1 if nonce is present in the compressed COSE object [draft-ietf-core-oscore-key-update-03] 16 Extension-3 Flag Set to 1 if the OSCORE Option specifies a fourth byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 24-31 17-23 Unassigned 24 Extension-4 Flag Set to 1 if the OSCORE Option specifies a fifth byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 32-39 25-31 Unassigned 32 Extension-5 Flag Set to 1 if the OSCORE Option specifies a sixth byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 40-47 33-39 Unassigned 40 Extension-6 Flag Set to 1 if the OSCORE Option specifies a seventh byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 48-55 41-47 Unassigned 48 Extension-7 Flag Set to 1 if the OSCORE Option specifies a eighth byte, which includes the [draft-ietf-core-oscore-key-update-03] flag bits 56-63 49-63 Unassigned RD Parameters Registration Procedure(s) Expert Review Expert(s) Carsten Bormann, Jaime Jim¨Ļnez, Christian Ams¨šss Reference [RFC9176] Note In accordance with [RFC9423], all entries with the "A" flag set, including new ones, MUST also be registered in the "Target Attributes" registry [IANA registry core-parameters]. Available Formats [IMG] CSV Name Short Validity Use Description Reference Endpoint Name ep Unicode* RLA Name of the endpoint [RFC9176] Lifetime lt 1-4294967295 R Lifetime of the registration in seconds [RFC9176] Sector d Unicode* RLA Sector to which this endpoint belongs [RFC9176] Registration Base URI base URI RLA The scheme, address, port, and path at which this server is available [RFC9176] Page page Integer L Used for pagination [RFC9176] Count count Integer L Used for pagination [RFC9176] Endpoint Type et [RFC9176, Section 9.3.1] RLA Semantic type of the endpoint (see[RFC9176, Section 9.4]) [RFC9176] Endpoint Type (et=) RD Parameter Values Expert(s) Carsten Bormann, Jaime Jim¨Ļnez, Christian Ams¨šss Reference [RFC9176] Available Formats [IMG] CSV Range Registration Procedures value starts with "core" IETF Review all other values Specification Required Value Description Reference Notes core.rd-group An application group, as described in [RFC9176] Appendix A. [RFC9176] Standard Problem Detail Keys Registration Procedure(s) Specification Required Expert(s) Thomas Fossati, Carsten Bormann Reference [RFC9290] Available Formats [IMG] CSV Key Value Name CDDL Type Brief Description Change Controller Reference Short, human-readable IETF (core@ietf.org -1 title text / tag38 summary of the or art@ietf.org) [RFC9290] problem shape Human-readable -2 detail text / tag38 explanation specific IETF (core@ietf.org [RFC9290] to this occurrence of or art@ietf.org) the problem URI reference -3 instance ~uri identifying specific IETF (core@ietf.org [RFC9290] occurrence of the or art@ietf.org) problem -4 response-code uint .size 1 CoAP response code IETF (core@ietf.org [RFC9290] or art@ietf.org) -5 base-uri ~uri Base URI IETF (core@ietf.org [RFC9290] or art@ietf.org) Base language tag IETF (core@ietf.org -6 base-lang tag38-ltag (see [RFC9290, or art@ietf.org) [RFC9290] Appendix A]) Base writing -7 base-rtl tag38-direction direction (see IETF (core@ietf.org [RFC9290] [RFC9290, Appendix or art@ietf.org) A]) Option number(s) of IETF (core@ietf.org -8 unprocessed-coap-option one-or-more CoAP option(s) that or art@ietf.org) [RFC9290, Section 3.1.1] were not understood Byte index inside the -25 request-body-error-position uint request body at which [CoRE_WG] [draft-amsuess-core-pd-body-error-position-00] the error became apparent Custom Problem Detail Keys Registration Procedure(s) Expert Review Expert(s) Thomas Fossati, Carsten Bormann Reference [RFC9290] Available Formats [IMG] CSV Key Value Name Brief Description Change Controller Reference 0 ace-groupcomm-error Carry [RFC9594] problem details in a Concise Problem IETF [RFC9594, Section 4.1.2] Details data item 1 ace-trl-error Carry [RFC9770] problem details in a Concise Problem IETF [RFC9770, Section 6.1] Details data item. 7807 tunnel-7807 Carry [RFC7807] problem details in a Concise Problem IETF (core@ietf.org or art@ietf.org) [RFC9290, Appendix B] Details data item Target Attributes Registration Procedure(s) Expert Review Expert(s) Carsten Bormann, Marco Tiloca Reference [RFC9423] Available Formats [IMG] CSV Attribute Name Brief Description Change Controller Reference href reserved (not useful as target attribute name) IETF [RFC6690] anchor reserved (not useful as target attribute name) IETF [RFC6690] rel reserved (not useful as target attribute name) IETF [RFC6690] rev reserved (not useful as target attribute name) IETF [RFC6690] hreflang (Web Linking) IETF [RFC8288] media (Web Linking) IETF [RFC8288] title (Web Linking) IETF [RFC8288] type (Web Linking) IETF [RFC8288] rt resource type IETF [RFC6690, Section 3.1] if interface description IETF [RFC6690, Section 3.2] sz maximum size estimate IETF [RFC6690, Section 3.3] ct Content-Format hint IETF [RFC7252, Section 7.2.1] obs observable resource IETF [RFC7641, Section 6] hct HTTP-CoAP URI mapping template IETF [RFC8075, Section 5.5] osc hint: resource only accessible using OSCORE IETF [RFC8613, Section 9] ep Endpoint Name (with rt="core.rd-ep") IETF [RFC9176, Section 9.3] d Sector (with rt="core.rd-ep") IETF [RFC9176, Section 9.3] base Registration Base URI (with rt="core.rd-ep") IETF [RFC9176, Section 9.3] et Endpoint Type (with rt="core.rd-ep") IETF [RFC9176, Section 9.3] ed-i Hint: support for the EDHOC Initiator role IETF [RFC9668] ed-r Hint: support for the EDHOC Responder role IETF [RFC9668] ed-method A supported authentication method for EDHOC IETF [RFC9668] ed-csuite A supported cipher suite for EDHOC IETF [RFC9668] ed-cred-t A supported type of authentication credential for EDHOC IETF [RFC9668] ed-idcred-t A supported type of authentication credential identifier for EDHOC IETF [RFC9668] ed-ead A supported External Authorization Data (EAD) item for EDHOC IETF [RFC9668] ed-comb-req Hint: support for the EDHOC+OSCORE request IETF [RFC9668] Contact Information ID Name Contact URI Last Updated [Benjamin_Valentin] Benjamin Valentin mailto:benjamin.valentin&ml-pa.com 2025-04-22 [CoRE_WG] IETF CoRE WG (reverts to IETF after WG closes) mailto:core&ietf.org [Michael_Koster] Michael Koster mailto:michael.koster&smartthings.com 2017-07-03 Licensing Terms Presently we were in a very dark road, and at a point where it dropped suddenly between steep sides we halted in black shadow. A gleam of pale sand, a whisper of deep flowing waters, and a farther glimmer of more sands beyond them challenged our advance. We had come to a "grapevine ferry." The scow was on the other side, the water too shoal for the horses to swim, and the bottom, most likely, quicksand. Out of the blackness of the opposite shore came a soft, high-pitched, quavering, long-drawn, smothered moan of woe, the call of that snivelling little sinner the screech-owl. Ferry murmured to me to answer it and I sent the same faint horror-stricken tremolo back. Again it came to us, from not farther than one might toss his cap, and I followed Ferry down to the water's edge. The grapevine guy swayed at our side, we heard the scow slide from the sands, and in a few moments, moved by two videttes, it touched our shore. Soon we were across, the two videttes riding with us, and beyond a sharp rise, in an old opening made by the swoop of a hurricane, we entered the silent unlighted bivouac of Ferry's scouts. Ferry got down and sat on the earth talking with Quinn, while the sergeants quietly roused the sleepers to horse. Plotinus is driven by this perplexity to reconsider the whole theory of Matter.477 He takes AristotleĄ¯s doctrine as the groundwork of his investigation. According to this, all existence is divided into Matter and Form. What we know of thingsĄĒin other words, the sum of their differential characteristicsĄĒis their Form. Take away this, and the unknowable residuum is their Matter. Again, Matter is the vague indeterminate something out of which particular Forms are developed. The two are related as Possibility to Actuality, as the more generic to the more specific substance through every grade of classification and composition. Thus there are two Matters, the one sensible and the other intelligible. The former constitutes the common substratum of bodies, the other the common element of ideas.478 The general distinction between Matter and Form was originally suggested to Aristotle by PlatoĄ¯s remarks on the same subject; but he differs325 from his master in two important particulars. Plato, in his Timaeus, seems to identify Matter with space.479 So far, it is a much more positive conception than the ?λη of the Metaphysics. On the other hand, he constantly opposes it to reality as something non-existent; and he at least implies that it is opposed to absolute good as a principle of absolute evil.480 Thus while the Aristotelian world is formed by the development of Power into Actuality, the Platonic world is composed by the union of Being and not-Being, of the Same and the Different, of the One and the Many, of the Limit and the Unlimited, of Good and Evil, in varying proportions with each other. The Lawton woman had heard of an officer's family at Grant, which was in need of a cook, and had gone there. [See larger version] On the 8th of July an extraordinary Privy Council was summoned. All the members, of whatever party, were desired to attend, and many were the speculations as to the object of their meeting. The general notion was that it involved the continuing or the ending of the war. It turned out to be for the announcement of the king's intended marriage. The lady selected was Charlotte, the second sister of the Duke of Mecklenburg-Strelitz. Apart from the narrowness of her education, the young princess had a considerable amount of amiability, good sense, and domestic taste. These she shared with her intended husband, and whilst they made the royal couple always retiring, at the same time they caused them to give, during their lives, a moral air to their court. On the 8th of September Charlotte arrived at St. James's, and that afternoon the marriage took place, the ceremony being performed by the Archbishop of Canterbury. On the 22nd the coronation took place with the greatest splendour. Mother and girls were inconsolable, for each had something that they were sure "Si would like," and would "do him good," but they knew Josiah Klegg, Sr., well enough to understand what was the condition when he had once made up his mind. CHAPTER V. THE YOUNG RECRUITS Si proceeded to deftly construct a litter out of the two guns, with some sticks that he cut with a knife, and bound with pawpaw strips. His voice had sunk very low, almost to sweetness. A soft flurry of pink went over her face, and her eyelids drooped. Then suddenly she braced herself, pulled herself taut, grew combative again, though her voice shook. HoME˛ÔžŽĪčĖĢĘ˛Ã´ĐĮ×ų ENTER NUMBET 0016gzzzyc.org.cn
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