Table 6.5 -- EDCS attributes whose label begins with A

Label Definition Attribute value type EQ label Code
ABSOLUTE_ELEVATION_ACCURACY The accuracy of an elevation value relative to a specified <SURFACE_DATUM> expressed in units of length at 90% linear error; the absolute elevation accuracy. REAL LENGTH 1
ABSOLUTE_HORIZONTAL_ACCURACY The horizontal accuracy of a <LOCATION> relative to a defined standard expressed in units of length at 90% circular error; the absolute horizontal accuracy. REAL LENGTH 2
ABSOLUTE_HUMIDITY The ratio of the <<MASS>> of water vapour to the <<VOLUME>> occupied by the mixture of water vapour and dry <AIR>; the absolute humidity. REAL MASS_FRACTION 3
ABSOLUTE_LATITUDE_ACCURACY The angular accuracy of the geodetic latitude value of a <LOCATION> in relation to a specified <SURFACE_DATUM> expressed in angular units at 90% angular error; the absolute latitude accuracy. REAL PLANE_ANGLE 4
ABSOLUTE_LONGITUDE_ACCURACY The angular accuracy of the geodetic longitude of a <LOCATION> in relation to a specified <SURFACE_DATUM> expressed in angular units at 90% angular error; the absolute longitude accuracy. REAL PLANE_ANGLE 5
ABSOLUTE_VERTICAL_ACCURACY The vertical accuracy of a <LOCATION> relative to a defined standard expressed in units of length at 90% linear error; the absolute vertical accuracy. REAL LENGTH 6
ACCUM_PRECIP The depth of <PRECIPITATION> (water-equivalent) that accumulated over a measurement <<TIME_QUANTITY>>. REAL LENGTH 7
ACCUM_PRECIP_24_HOUR The <<ACCUM_PRECIP>> during a 24-hour <<TIME_QUANTITY>>. REAL LENGTH 8
ACCUM_PRECIP_24_HOUR_DENSITY The <<ACCUM_PRECIP_24_HOUR>> expressed as a surface density. REAL SURFACE_DENSITY 9
ACCUM_PRECIP_3_HOUR The <<ACCUM_PRECIP>> during a 3-hour <<TIME_QUANTITY>>. REAL LENGTH 10
ACCUM_PRECIP_3_HOUR_DENSITY The <<ACCUM_PRECIP_3_HOUR>> expressed as a surface density. REAL SURFACE_DENSITY 11
ACCUM_PRECIP_6_HOUR The <<ACCUM_PRECIP>> during a 6-hour <<TIME_QUANTITY>>. REAL LENGTH 12
ACCUM_PRECIP_6_HOUR_DENSITY The <<ACCUM_PRECIP_6_HOUR>> expressed as a surface density. REAL SURFACE_DENSITY 13
ACCUM_PRECIP_DENSITY The <<ACCUM_PRECIP>> expressed as a surface density. REAL SURFACE_DENSITY 14
ACCUMULATION_PERIOD The <<TIME_QUANTITY>> prior to the referenced time over which a <MATERIAL> has accumulated on a <SURFACE>; the accumulation period. REAL TIME 15
ACCUMULATION_PERIOD_CATEGORY The category of an <<ACCUMULATION_PERIOD>>. ENUMERATION   16
ACOUSTIC_BOUNDARY_LOSS The quantity of acoustic energy that is lost at a specific angle due to interaction of an acoustic signal waveform with either the <WATER_BODY_SURFACE> or the <WATER_BODY_FLOOR>; the acoustic boundary loss. REAL FIELD_OR_POWER_LEVEL_DIFF 17
ACOUSTIC_CENTRE_FREQUENCY The electro-acoustic one-third-octave band centre <<FREQUENCY>> (approximate). ENUMERATION   18
ACOUSTIC_HALFCHANNEL-
_OBSERVATION_FRACTION 		The fraction of observations indicating the presence of an acoustic half-channel in a <WATER_BODY>. REAL PURE_NUMBER 19
ACOUSTIC_NOISE_MARGINAL_ICE-
_ZONE_MULTIPLIER 		The correction factor applied to underwater sound levels that incorporates acoustic noise related to an <AIRCRAFT> operating in the marginal ice zone. REAL PURE_NUMBER 20
ACOUSTIC_NOISE_SPECTRAL-
_CURVE_CORRECTION 		The acoustic noise level correction obtained from a spectral class curve to be applied to some base acoustic noise level in a <WATER_BODY>; the acoustic noise spectral curve correction. REAL FIELD_OR_POWER_LEVEL_DIFF 21
ACOUSTIC_PWR_LVL_BAND The power level of acoustic energy in a <WATER_BODY> measured one metre from the source acoustic centre in a defined frequency band. REAL PRESSURE_POWER_LEVEL 22
ACOUSTIC_PWR_LVL_SPECTRUM The ratio of sound wave intensity in a <WATER_BODY> in a one hertz band to a reference intensity measured one metre from the source; the acoustic power level spectrum. REAL PRESSURE_POWER_LEVEL 23
ACOUSTIC_PWR_LVL_SPECTRUM-
_CORRECTION 		The omni directional ambient noise spectrum level correction in a <WATER_BODY> at a specified <<FREQUENCY>> referenced to a 50 hertz reference level; the acoustic power level spectrum correction. REAL FIELD_OR_POWER_LEVEL_DIFF 24
ACOUSTIC_REFLECTION_TYPE The type of acoustic reflection from a <WATER_BODY_FLOOR>. ENUMERATION   25
ACOUSTIC_REFLECTOR An indication that an <OBJECT> reflects acoustic energy in a specified frequency band; acoustic reflector. BOOLEAN   26
ACOUSTIC_SCATTERING_STRENGTH The column (integrated) acoustic scattering strength (ratio of returned to incident energy) in a <WATER_BODY>. REAL AREIC_POWER_LEVEL_DIFF 27
ACOUSTIC_TARGET_STRENGTH The ratio of the intensity of sound returned by a sonar target at a distance of one metre from the acoustic centre of the target in a specified <DIRECTION> to the incident intensity from a distant source; the acoustic target strength. REAL FIELD_OR_POWER_LEVEL_DIFF 28
ACOUSTIC_TRANSMISSION_LOSS The acoustic <<TRANSMISSION_LOSS>>. REAL FIELD_OR_POWER_LEVEL_DIFF 29
ACOUSTIC_VOLUME_LAYER-
_SCATTERING_STRENGTH_FREQUENCY 		The acoustic <<FREQUENCY>> at which a volume layer scattering strength in a <WATER_BODY> is reported. REAL FREQUENCY 30
ACOUSTIC_VOLUME_SCATTERING-
_STRENGTH_PROVINCE_INDEX 		The numeric identifier of a <REGION> of a <WATER_BODY> composed of similar volumetric <<ACOUSTIC_SCATTERING_STRENGTH>>s that are markedly in contrast with those of surrounding <REGION>s; the acoustic volume scattering strength province index. INDEX   31
ACTIVE_ACOUSTIC An indication that an <OBJECT> generates intentional emissions of acoustic energy used for the purposes of detection, localization, and/or identification; active acoustic. BOOLEAN   32
AERIAL_COUNT The number of distinct <AERIAL>s on a <STRUCTURE>; the aerial count. COUNT   33
AERIAL_TYPE The structural type of an <AERIAL>. ENUMERATION   34
AERIAL_USE The functional use of an <AERIAL>. ENUMERATION   35
AERODROME_ELEVATION The highest elevation of the usable <RUNWAY>s of an <AERODROME>, measured from the MSL <SURFACE_DATUM>. REAL LENGTH 36
AERODROME_EMERGENCY_LIGHTING-
_INTENSITY 		A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of emergency <LIGHTING> at an <AERODROME>. Zero means no light and one means maximum intensity. REAL PURE_NUMBER 37
AERODROME_GATE_LIGHTING-
_INTENSITY 		A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of external gate <LIGHTING> at an <AERODROME>. Zero means no light and one means maximum intensity. REAL PURE_NUMBER 38
AERODROME_IDENTIFICATION The unique set of numbers preceded by the appropriate country code that enables an individual <AERODROME> to be uniquely identified within a database; the aerodrome identification. STRING   39
AERODROME_TYPE The type of an <AERODROME>. ENUMERATION   40
AERONAUTICAL_LIGHT_TYPE The type of <LIGHTING> or <SYSTEM> of <LIGHTING> that supports of aeronautical navigation; the aeronautical light type. ENUMERATION   41
AERONAUTICAL_OBSTRUCTION-
_HEIGHT_ACCURACY 		The difference between the recorded <<HEIGHT_AGL>> of an <OBJECT> forming a <NATURAL_AIR_OBSTRUCTION> or <MAN_MADE_AIR_OBSTRUCTION> and its true <<HEIGHT_AGL>> at 90% probability; the aeronautical obstruction height accuracy. REAL LENGTH 42
AEROSOL_LAYER_BASE The altitude relative to a <<ATM_VERTICAL_REFERENCE>> of the lowest <SURFACE> of a layer of an <AEROSOL>; the aerosol layer base. REAL LENGTH 43
AEROSOL_LAYER_TOP The altitude relative to a <<ATM_VERTICAL_REFERENCE>> of the highest<SURFACE> of a layer of an <AEROSOL>; the aerosol layer base. REAL LENGTH 44
AEROSOL_PARTICLE_CONCENTRATION The <PARTICLE> concentration of an <AEROSOL>. REAL VOLUMETRIC_ENTITY_DENSITY 45
AEROSOL_PARTICLE_TYPE The type of <PARTICLE> in an <AEROSOL>. ENUMERATION   46
AFTERBURNER_INDUCED_FLAME_RATE A number between 0 and 1 inclusive representing the linearly-scaled fraction of the production rate of visible flame induced by use of the afterburner of an <AIRCRAFT>; the afterburner induced flame rate. Zero means no production and one means maximum production. REAL PURE_NUMBER 47
AID_TO_NAVIGATION_COLOUR-
_PATTERN 		The colour pattern of an <OBJECT> (for example: an <AID_TO_NAVIGATION>, a <BUOY>, a <BEACON>, or a <NAVIGATION_LIGHT>) of importance to navigation. ENUMERATION   48
AID_TO_NAVIGATION_DESCRIPTION The textual description of <AID_TO_NAVIGATION>s that are marking an <OBJECT>. Example: marked by buoys. STRING   49
AID_TO_NAVIGATION-
_EFFECTIVENESS_RADIUS 		The radius of effectiveness of an <AID_TO_NAVIGATION>. REAL LENGTH 50
AID_TO_NAVIGATION_MARK_COLOUR The colours of an <AID_TO_NAVIGATION> mark. ENUMERATION   51
AID_TO_NAVIGATION_MARK_SYSTEM The specific <SYSTEM> of <AID_TO_NAVIGATION> marks supported by an <OBJECT>. ENUMERATION   52
AID_TO_NAVIGATION_MARKER_TYPE The type of a <MARKER> serving as an <AID_TO_NAVIGATION>. ENUMERATION   53
AID_TO_NAVIGATION_PRIMARY-
_OPERATING_RANGE 		The primary operating range of an <AID_TO_NAVIGATION> beyond which the capture of the signal is not completely assured. REAL LENGTH 54
AID_TO_NAVIGATION_RANGE The length of range established by <AID_TO_NAVIGATION>s on the <SHORE>. REAL LENGTH 55
AID_TO_NAVIGATION_SECONDARY-
_OPERATING_RANGE 		The secondary operating range of an <AID_TO_NAVIGATION> beyond which the capture of the signal is not completely assured. REAL LENGTH 56
AID_TO_NAVIGATION_STATUS The status of an <OBJECT> as an <AID_TO_NAVIGATION>. ENUMERATION   57
AID_TO_NAVIGATION_SYSTEM_TYPE The type of a <SYSTEM> of <AID_TO_NAVIGATION>s. ENUMERATION   58
AIR_DENSITY The <<MATERIAL_DENSITY>> of the <AIR>. REAL VOLUMIC_MASS 59
AIR_EXFILTRATION_RATE The rate at which interior <AIR> leaks out of a <STRUCTURE> expressed as the fraction of the <<VOLUME>> of <AIR> in the <STRUCTURE> per unit time; the air exfiltration rate. REAL RATE 60
AIR_INFILTRATION_RATE The rate at which exterior <AIR> leaks into a <STRUCTURE> expressed as the fraction of the <<VOLUME>> of <AIR> in the <STRUCTURE> per unit time; the air infiltration rate. REAL RATE 61
AIR_TEMPERATURE The temperature of the <AIR> indicated by a thermometer exposed to the <AIR> at a <LOCATION> sheltered from direct solar radiation. REAL THERMO_TEMPERATURE 62
AIR_TEMPERATURE_ERROR The error in a measurement of an <<AIR_TEMPERATURE>> that is introduced by uncertainties. REAL THERMO_TEMPERATURE 63
AIR_TEMPERATURE_PERIOD The <<TIME_QUANTITY>> of the <<MINIMUM_LOW_AIR_TEMPERATURE>> and/or the <<MAXIMUM_HIGH_AIR_TEMPERATURE>>. REAL TIME 64
AIRCRAFT_CARRIER_CLASS The class of an <AIRCRAFT_CARRIER>. ENUMERATION   65
AIRCRAFT_FUNCTION The operating function of an <AIRCRAFT>. ENUMERATION   66
AIRCRAFT_ICING_INTENSITY The estimated intensity of the accumulation of <ICE> on exposed <SURFACE>s of an <AIRCRAFT> that is formed as the <AIRCRAFT> is flown through supercooled drops of <WATER> in <CLOUD>s or <RAIN>. ENUMERATION   67
AIRCRAFT_ICING_LEVEL_BASE-
_ALTITUDE 		The estimated <<ALTITUDE_MSL>> of the lower <SURFACE> of a layer in the <ATMOSPHERE> at which an <AIRCRAFT> can be expected to experience icing. REAL LENGTH 68
AIRCRAFT_ICING_LEVEL_TOP-
_ALTITUDE 		The estimated <<ALTITUDE_MSL>> of the upper <SURFACE> of a layer in the <ATMOSPHERE> at which an <AIRCRAFT> can be expected to experience icing. REAL LENGTH 69
AIRCRAFT_ICING_TYPE The type of <ICE> that is expected to accumulate on the <SURFACE> of an <AIRCRAFT>. ENUMERATION   70
AIRCRAFT_LANDING_GEAR-
_DEPLOYED_POSITION 		A number between 0 and 1 inclusive representing the linearly-scaled fractional deployment of the landing gear of an <AIRCRAFT>. Zero means fully retracted and one means fully deployed. REAL PURE_NUMBER 71
AIRCRAFT_LOAD_RESTRICTIONS The description of any load restrictions that apply to <AIRCRAFT> using a <FACILITY>. STRING   72
AIRCRAFT_PROPULSION_TYPE The type of propulsion of an <AIRCRAFT>. ENUMERATION   73
AIRCRAFT_TYPE The type of an <AIRCRAFT>. ENUMERATION   74
AIRSPACE_ALTITUDE_LIMITS The description of the altitude limits of a <SPECIAL_USE_AIRSPACE> relative to a specified <<ATM_VERTICAL_REFERENCE>>. STRING   75
AIRSPACE_IDENTIFIER The textual identifier of an <AIRSPACE>. STRING   76
AIRSPACE_LIMITATION The type of <AIRSPACE> wherein activities must be confined because of their nature and/or wherein limitations may be imposed upon <AIRCRAFT> operations. ENUMERATION   77
AIRSPACE_OPERATING-
_RESTRICTIONS 		The status of an <AIRSPACE> and any operating restrictions that are applicable. STRING   78
AIRSPACE_TYPE The type of designated <AIRSPACE> within which some or all <AIRCRAFT> may be subject to air traffic control. ENUMERATION   79
ALL_OBJECT_COUNT The number of <OBJECT>s of all types within a <REGION>; the all object count. COUNT   80
ALONGSHORE_CURRENT_SPEED The <<WATER_CURRENT_SPEED>> of a <WATER_CURRENT> paralleling a <SHORE>, largely within the <SURF_ZONE>, caused by the excess <WATER> brought to the <SURF_ZONE> by the small net mass transport of <WATER_WAVE>s induced by <WIND>; alongshore <WATER_CURRENT>s feed into rip <WATER_CURRENT>s. REAL SPEED 81
ALTITUDE_MSL The altitude relative to the MSL <SURFACE_DATUM>. REAL LENGTH 82
ANGULAR_SECTOR_WIDTH The angular width of an angular sector. REAL PLANE_ANGLE 83
ANTI_COLLISION_LIGHT_INTENSITY A number between 0 and 1 inclusive representing the linearly-scaled fractional intensity of external <LIGHTING> used to prevent collision with/between <VEHICLE>s; the anti-collision light intensity or brake light intensity. Zero means unlit and one means maximum intensity. REAL PURE_NUMBER 84
APERTURE_COVER_FRACTION A number between 0 and 1 inclusive representing the linearly-scaled fractional <<AREA>> of an <APERTURE> that is covered by <MATERIAL>s obstructing visibility. Zero means uncovered and one means completely covered. REAL PURE_NUMBER 85
APERTURE_COVER_POSITION The position of the covering (for example: a canopy or a hatch) of an <APERTURE>; the aperture cover position. ENUMERATION   86
APERTURE_LENGTH The length of the longer of two orthogonal linear axes of an <APERTURE> measured in the plane of the <APERTURE>; the aperture length. For a square <APERTURE>, either axis may be measured. For a round <APERTURE>, the diameter is measured. REAL LENGTH 87
APERTURE_OPEN An indication that an <APERTURE> is open. BOOLEAN   88
APERTURE_STATE The state of closure of an <APERTURE>. ENUMERATION   89
APERTURE_WIDTH The length of the shorter of two orthogonal linear axes of an <APERTURE> measured in the plane of the <APERTURE>; the aperture width. For a square <APERTURE>, either axis may be measured. For a round <APERTURE>, the diameter is measured. REAL LENGTH 90
AQUEDUCT_TYPE The type of an <AQUEDUCT>. ENUMERATION   91
AREA The area of the <OBJECT>. REAL AREA 92
ARMOURED An indication that an <OBJECT> is armoured. BOOLEAN   93
ARRESTING_GEAR_TYPE The type of <DEVICE> at the end of a <RUNWAY> that is used to stop <AIRCRAFT>; the arresting gear type. ENUMERATION   94
ASPECT_ANGLE The angle measured from the major axis of an <OBJECT> clockwise to the viewing <DIRECTION>; the aspect angle. Zero represents either the <DIRECTION> of motion, or other unique orientation along the primary axis, heading directly towards the observer. REAL PLANE_ANGLE 95
ASSAULT_LANDING_CRAFT_TYPE The type of a <LANDING_CRAFT> designed for amphibious assault operations. ENUMERATION   96
ASSOCIATED_TEXT Narrative or other textual description associated with an <OBJECT>; the associated text. STRING   97
ASW_CENTROID_PRESENT An indication that the centroid of an ASW operating <REGION> exists within the spatial extent of an associated <OBJECT>; ASW centroid present. BOOLEAN   98
ASW_WINGED_AIRCRAFT_TYPE The type of an <ASW_WINGED_AIRCRAFT>. ENUMERATION   99
ATM_BOUNDARY_LAYER_HEIGHT The <<HEIGHT_AGL>> of the lowest layer in the <ATMOSPHERE> in which meteorological conditions are affected significantly by the <PLANETARY_SURFACE> of the <EARTH>. The value is variable in time and space and ranges from tens of metres in strongly statically stable situations to several kilometres in convective conditions over <DESERT_REGION>s; the atmosphere boundary layer height. REAL LENGTH 100
ATM_CEILING Either the <<HEIGHT_AGL>> of the lowest <CLOUD> or obscuring phenomena layer aloft that covers half or more of the sky and is predominantly opaque or the vertical visibility into a surface-based obscuration; the atmosphere ceiling. REAL LENGTH 101
ATM_CEILING_METHOD The method used to determine the <<ATM_CEILING>>. ENUMERATION   102
ATM_FREEZING_LEVEL The lowest <<ALTITUDE_MSL>> at which the <<AIR_TEMPERATURE>> is 273,15 kelvin (zero degrees Celsius); the atmosphere freezing level. REAL LENGTH 103
ATM_LIQUID_WATER_MIXING_RATIO The ratio of the <<MASS>> of liquid <WATER> to the <<MASS>> of dry <AIR> in a unit <<VOLUME>> of <AIR>; the atmosphere liquid water mixing ratio. REAL VOLUMIC_MASS 104
ATM_PRESSURE The pressure exerted by an <ATMOSPHERE> on any <SURFACE> by virtue of its weight; the atmospheric pressure. REAL PRESSURE 105
ATM_PRESSURE_CHANGE The quantity of change in the <<ATM_PRESSURE>> as a function of time. REAL PRESSURE_CHANGE_RATE 106
ATM_PRESSURE_CHANGE_24_HOUR The absolute value of the <<ATM_PRESSURE_CHANGE>> over a twenty-four hour <<TIME_QUANTITY>>. REAL PRESSURE 107
ATM_PRESSURE_CHANGE_3_HOUR The absolute value of the <<ATM_PRESSURE_CHANGE>> over a three-hour <<TIME_QUANTITY>>. REAL PRESSURE 108
ATM_PRESSURE_CHANGE_QUALITY The quality of an <<ATM_PRESSURE_CHANGE_TENDENCY_CATEGORY>> measurement. ENUMERATION   109
ATM_PRESSURE_CHANGE_TENDENCY-
_CATEGORY 		The qualitative <<ATM_PRESSURE_CHANGE_3_HOUR>>; the atmospheric pressure change tendency category. ENUMERATION   110
ATM_PRESSURE_MEAN_CLIM The mean of historical (climatology) <<ATM_PRESSURE>>. REAL PRESSURE 111
ATM_PRESSURE_MEAN_CLIM_STD_DEV The standard deviation of a historical (climatology) <SET> of <<ATM_PRESSURE>> measurements. REAL PRESSURE 112
ATM_PRESSURE_QUALITY The quality of an <<ATM_PRESSURE>> measurement. ENUMERATION   113
ATM_PRESSURE_REDUCED_CLIM-
_STD_DEV 		The standard deviation of a historical (climatology) <SET> of <<ATM_PRESSURE_REDUCED_MSL>> measurements. REAL PRESSURE 114
ATM_PRESSURE_REDUCED_MSL The <<ATM_PRESSURE>> reduced to MSL using standard procedures. REAL PRESSURE 115
ATM_PROFILE_MEASUREMENT-
_TECHNIQUE 		The technique or method of collecting an <ATMOSPHERE_PROPERTY_SET> that is a series of measurements collected along a (roughly) vertical axis; the atmospheric profile measurement technique. ENUMERATION   116
ATM_TURBULENCE_TYPE The type of turbulence in the <ATMOSPHERE> experienced by <AIRCRAFT>. ENUMERATION   117
ATM_VERTICAL_REFERENCE The <SURFACE_DATUM> and accompanying method of reporting the vertical displacement to an <OBJECT> (for example: a level in an <ATMOSPHERE>) in an <ATMOSPHERE>; the atmosphere vertical reference. ENUMERATION   118
ATS_AIRSPACE_CLASS The class of an ATS <AIRSPACE>. ENUMERATION   119
ATS_ROUTE_COMPONENT_LENGTH The <<LENGTH>> of an <ATS_ROUTE_COMPONENT>. REAL LENGTH 120
ATS_ROUTE_COMPONENT_LEVEL The flight level of an <ATS_ROUTE_COMPONENT>. ENUMERATION   121
ATS_ROUTE_COMPONENT_WIDTH The <<WIDTH>> of an <ATS_ROUTE_COMPONENT>. REAL LENGTH 122
ATS_ROUTE_LOWEST_ALTITUDE The lowest published altitude in effect along a <ATS_ROUTE_COMPONENT> that meets obstacle clearance requirements for the entire <ATS_ROUTE_COMPONENT> and that assures an acceptable navigation signal. REAL LENGTH 123
ATS_ROUTE_OPPOSITE_FLOW-
_DIRECTION 		The <DIRECTION> opposite to the flow of an <ATS_ROUTE_COMPONENT>. REAL PLANE_ANGLE 124
ATS_ROUTE_TYPE The type of an <ATS_ROUTE>. ENUMERATION   125
ATS_USE_TYPE The type of use of a designated ATS <AIRSPACE>. ENUMERATION   126
ATTACHED An indication that an <OBJECT> is attached to another specified <OBJECT>. BOOLEAN   127
ATTACK_WINGED_AIRCRAFT_TYPE The type of an <ATTACK_WINGED_AIRCRAFT>. ENUMERATION   128
AUXILIARY_VESSEL_TYPE The type of a <WATER_SURFACE_VESSEL> designed for auxiliary operations. ENUMERATION   129
AVAILABLE_FACILITIES_TYPE The type of <FACILITY>s available at, or in the near vicinity of, a <HARBOUR> or marina. ENUMERATION   130
AVERAGING_PERIOD The <<TIME_QUANTITY>> over which a measurement has been averaged; the averaging period. REAL TIME 131
AVERAGING_PERIOD_CATEGORY A category describing the <<AVERAGING_PERIOD>>. ENUMERATION   132
AVIATION_LOCATION_ID_VALUE_SET The value <SET> of a formatted <<AVIATION_LOCATION_IDENTIFIER>>. ENUMERATION   133
AVIATION_LOCATION_IDENTIFIER An identifier of an aviation <LOCATION>. The format and values of the identifier are specified by an <<AVIATION_LOCATION_ID_VALUE_SET>>. CONSTRAINED_STRING   134

separator bar

http://www.iso.ch/iso/en/ittf/PubliclyAvailableStandards/ISO_IEC_18025_Ed1.html