Table 6.7 -- EDCS Attributes whose label begins with D
| Label | Definition | Attribute value type | EQ label | Related concepts | Code |
| DAM_FACE_TYPE | The type of face of a dam. | ENUMERATION | 245 | ||
| DAY_WITHIN_YEAR | The ordinal index of the day within the year, starting with "1" on January 1st. | INTEGER | PURE_NUMBER | 246 | |
| DEFENSIVE_POSITION_COUNT | The total number of defensive positions within an object. | COUNT | 247 | ||
| DEFENSIVE_POSITION_TYPE | The type of a military defensive position. | ENUMERATION | 248 | ||
| DELINEATION_CERTAIN | Indicates that knowledge of the delineation of an object is certain, e.g., limits or other information. | LOGICAL | 249 | ||
| DENSITY_ALTITUDE | The pressure altitude corrected for deviations from the standard atmosphere. | REAL | LENGTH | 250 | |
| DEPTH_BELOW_OCEAN_FLOOR | The distance measured from the surface of the ocean floor down to the point of measurement, as a positive number. | REAL | LENGTH | 251 | |
| DEPTH_BELOW_SURFACE_LEVEL | The distance measured from the highest point at surface level to the lowest point of an object below the surface; recorded values are positive numbers. | REAL | LENGTH | 252 | |
| DEWPOINT_DEPRESSION | The difference between the air temperature and the dewpoint. | REAL | THERMO_TEMPERATURE | 253 | |
| DEWPOINT_ERROR | The potential error in the dewpoint temperature of an air temperature observation. | REAL | THERMO_TEMPERATURE | 254 | |
| DEWPOINT_MAXIMUM_DIF_CLIM | The historical maximum difference between the dewpoint temperature at an initial time and the dewpoint temperature at an offset from that time. | REAL | THERMO_TEMPERATURE | 255 | |
| DEWPOINT_MINIMUM_DIF_CLIM | The historical minimum difference between the dewpoint temperature at an initial time and the dewpoint temperature at an offset from that time. | REAL | THERMO_TEMPERATURE | 256 | |
| DEWPOINT_QUALITY | The quality of a dew point temperature observation. | ENUMERATION | EA DEWPOINT_TEMPERATURE, EA SURFACE_DEWPOINT_TEMP | 257 | |
| DEWPOINT_TEMPERATURE | The temperature to which a given parcel of air must be cooled at constant pressure and water vapour content in order for saturation to occur. | REAL | THERMO_TEMPERATURE | 258 | |
| DIFFUSE_LIGHT_INTENSITY | The fraction of maximum diffuse light intensity from an object. | REAL | PURE_NUMBER | EA AMBIENT_LIGHT_INTENSITY, EA SPECULAR_LIGHT_INTENSITY | 259 |
| DIFFUSE_SRF_REFLECTIVITY | The diffuse component of the surface reflectivity. Diffuse reflectivity may be qualified by other attributes, e.g., the electromagnetic band for which the value applies. | REAL | PURE_NUMBER | EA EM_BAND, EA AMBIENT_SRF_REFLECTIVITY, EA SPECULAR_SRF_REFLECTIVITY, EA SURFACE_REFLECTIVITY | 260 |
| DIR_SNOISE_CORRECTION | The correction to the directional shipping noise spectral power level; typically taken at 50 hertz. | REAL | FIELD_OR_POWER_LEVEL | 261 | |
| DIR_SNOISE_SPECPL_DANES | The directional shipping noise spectral power level in the ocean volume at 50 Hz as predicted by DANES; this quantity may be qualified by a compass direction or sector, a reference spectral frequency (if other than 50 Hz), and an ocean location. | REAL | PRESSURE_POWER_LEVEL | 262 | |
| DITCH_BERM_TYPE | The type of engineered combination ditch/berm. | ENUMERATION | 263 | ||
| DOMINANT_BREAKER_TYPE | The type of a breaking wave tripped by shoaling water, dependent on the nature of the bottom and beach slope. | ENUMERATION | 264 | ||
| DRAGON_TEETH_TYPE | The type of a dragon teeth obstacle. | ENUMERATION | 265 | ||
| DROP_GATE_TYPE | The type of a drop gate. | ENUMERATION | 266 | ||
| DURATION | The time duration for which an activity is permitted. | REAL | TIME | 267 | |
| DUST_PRODUCTION_RATE | The fraction of maximum production rate of dust induced by ground movement or surface winds. The following interpretations may be applied: 1/4: Small, 2/4: Medium, 3/4: Large, 4/4: Maximum. | REAL | PURE_NUMBER | 268 |