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NIST SP 811 (2008), Appendix B); standard process-engineering convention","origin":null},{"id":"degF","symbol":"°F","name":"Degree Fahrenheit","group":"temperature","aliases":["°F"],"dimension":[0,0,0,0,1,0,0],"quantity_kind":"absolute_temperature","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (degree Fahrenheit)","origin":null},{"id":"degR","symbol":"°R","name":"Degree Rankine","group":"temperature","aliases":["°R"],"dimension":[0,0,0,0,1,0,0],"quantity_kind":"absolute_temperature","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (degree Rankine)","origin":null},{"id":"delta_degF","symbol":"Δ°F","name":"Degree Fahrenheit difference","group":"temperature","aliases":["Δ°F"],"dimension":[0,0,0,0,1,0,0],"quantity_kind":"temperature_difference","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (degree Fahrenheit, temperature interval)","origin":null},{"id":"delta_degR","symbol":"Δ°R","name":"Degree Rankine difference","group":"temperature","aliases":["Δ°R"],"dimension":[0,0,0,0,1,0,0],"quantity_kind":"temperature_difference","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (degree Rankine, temperature interval)","origin":null},{"id":"week","symbol":"week","name":"Week","group":"time","aliases":["wk","w"],"dimension":[0,0,1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"ISO 8601-1:2019 (week of 7 days); BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 (day = 86 400 s)","origin":null},{"id":"yr_common","symbol":"yr_common","name":"Common year","group":"time","aliases":[],"dimension":[0,0,1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (year, 365 days)","origin":null},{"id":"yr_julian","symbol":"yr_julian","name":"Julian year","group":"time","aliases":[],"dimension":[0,0,1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"IAU Style Manual (1989), Julian year a = 365.25 d; BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 (day = 86 400 s)","origin":null},{"id":"ly","symbol":"ly","name":"Light year","group":"length","aliases":[],"dimension":[0,1,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"IAU Style Manual (1989) (light year = c x Julian year); BIPM SI Brochure, 9th ed. (2019), ch. 2, Table 1 (c = 299 792 458 m/s)","origin":null},{"id":"acre_int","symbol":"acre_int","name":"International acre","group":"area","aliases":[],"dimension":[0,2,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B.6 (160 rd^2 = 1 acre = 43 560 ft^2); International yard and pound agreement (1959)","origin":null},{"id":"acre_us_survey","symbol":"acre_us_survey","name":"US survey acre","group":"area","aliases":[],"dimension":[0,2,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (acre, based on U.S. survey foot); NIST SP 811 (2008), Appendix B.6","origin":null},{"id":"kn","symbol":"kn","name":"Knot","group":"speed","aliases":[],"dimension":[0,1,-1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (knot = nautical mile per hour); BIPM SI Brochure, 9th ed. (2019), ch. 4, Table 8 and note (k)","origin":null},{"id":"fl_oz_us","symbol":"fl_oz_us","name":"US fluid ounce","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (fluid ounce, U.S. = 2.957 353 E-05 m^3); NIST Handbook 44, Appendix C (1 gallon = 128 fluid ounces)","origin":null},{"id":"cup_us","symbol":"cup_us","name":"US cup","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (cup, U.S. liquid measure)","origin":null},{"id":"qt_us","symbol":"qt_us","name":"US liquid quart","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (quart, U.S. liquid)","origin":null},{"id":"tbsp_us","symbol":"tbsp_us","name":"US tablespoon","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (tablespoon, U.S.)","origin":null},{"id":"tsp_us","symbol":"tsp_us","name":"US teaspoon","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (teaspoon, U.S.)","origin":null},{"id":"fl_oz_imp","symbol":"fl_oz_imp","name":"Imperial fluid ounce","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"UK Weights and Measures Act 1985, Schedule 1, Part VI (fluid ounce = 1/20 pint)","origin":null},{"id":"qt_imp","symbol":"qt_imp","name":"Imperial quart","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"UK Weights and Measures Act 1985, Schedule 1, Part VI (quart = 1/4 gallon)","origin":null},{"id":"grain","symbol":"grain","name":"Grain","group":"mass","aliases":[],"dimension":[1,0,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (grain, 1/7000 pound avoirdupois)","origin":null},{"id":"carat","symbol":"carat","name":"Metric carat","group":"mass","aliases":[],"dimension":[1,0,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (carat, metric = 2.0 E-04 kg)","origin":null},{"id":"erg","symbol":"erg","name":"Erg","group":"energy","aliases":[],"dimension":[1,2,-2,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (erg)","origin":null},{"id":"dyn","symbol":"dyn","name":"Dyne","group":"force","aliases":[],"dimension":[1,1,-2,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (dyne)","origin":null},{"id":"kgf","symbol":"kgf","name":"Kilogram-force","group":"force","aliases":[],"dimension":[1,1,-2,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (kilogram-force)","origin":null},{"id":"grad","symbol":"grad","name":"Gradian","group":"angle","aliases":["gon"],"dimension":[0,0,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (grade); ISO 80000-3:2019 (gon)","origin":null},{"id":"P","symbol":"P","name":"Poise","group":"dynamic_viscosity","aliases":["poise"],"dimension":[1,-1,-1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"si","namespace":"std","source":"NIST SP 811 (2008), Appendix B.8 (poise = 1.0 E-01 Pa s)","origin":null},{"id":"St","symbol":"St","name":"Stokes","group":"kinematic_viscosity","aliases":["stokes"],"dimension":[0,2,-1,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"si","namespace":"std","source":"NIST SP 811 (2008), Appendix B.8 (stokes = 1.0 E-04 m^2/s)","origin":null},{"id":"bbl","symbol":"bbl","name":"Oil barrel","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"plain","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B.8 (barrel [for petroleum, 42 gallons (U.S.)] = 1.589 873 E-01 m^3); NIST Handbook 44, Appendix C (231 in^3 per gallon)","origin":null},{"id":"psig","symbol":"psig","name":"Pound-force per square inch gauge","group":"pressure","aliases":[],"dimension":[1,-1,-2,0,0,0,0],"quantity_kind":"gauge_pressure","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (pound-force per square inch); gauge pressure is measured from the ambient pressure (ADR-013)","origin":null},{"id":"barg","symbol":"barg","name":"Bar gauge","group":"pressure","aliases":[],"dimension":[1,-1,-2,0,0,0,0],"quantity_kind":"gauge_pressure","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (bar = 100 kPa); gauge pressure is measured from the ambient pressure (ADR-013)","origin":null},{"id":"Pag","symbol":"Pag","name":"Pascal gauge","group":"pressure","aliases":[],"dimension":[1,-1,-2,0,0,0,0],"quantity_kind":"gauge_pressure","exactness":"defined","prefixes":"si","namespace":"si","source":"BIPM SI Brochure (2019), Table 4 (pascal); gauge pressure is measured from the ambient pressure (ADR-013)","origin":null},{"id":"Nm3","symbol":"Nm³","name":"Normal cubic metre","group":"volume","aliases":["Nm³"],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"normal_volume","exactness":"defined","prefixes":"none","namespace":"std","source":"DIN 1343 (1990), normal condition: 273.15 K and 101 325 Pa","origin":null},{"id":"scf","symbol":"scf","name":"Standard cubic foot","group":"volume","aliases":[],"dimension":[0,3,0,0,0,0,0],"quantity_kind":"standard_volume","exactness":"defined","prefixes":"none","namespace":"std","source":"NIST SP 811 (2008), Appendix B (foot, so the cubic foot is 0.3048^3 m^3); reference state 60 degF and 14.696 psia per GPA Standard 2145 (edition not checked)","origin":null}],"ambiguous":[{"symbol":"ton","candidates":["ton_short","ton_long","tonne"],"planned":[],"note":"short ton (2000 lb), long ton (2240 lb) and metric tonne (1000 kg) are all called ton","resolved_by":null},{"symbol":"mt","candidates":["tonne"],"planned":[],"note":"SI reads mt as milli-tonne (1 kg, write mtonne or kg), while trade usage means metric ton (1000 kg, write tonne or t)","resolved_by":null},{"symbol":"gal","candidates":["gal_us","gal_imp"],"planned":[],"note":"US liquid gallon (3.785411784 L) and imperial gallon (4.54609 L) differ by about 20 percent","resolved_by":null},{"symbol":"oz","candidates":["oz_av","oz_troy","fl_oz_us","fl_oz_imp"],"planned":[],"note":"avoirdupois ounce, troy ounce and the fluid ounces (US and imperial) share the symbol","resolved_by":null},{"symbol":"pt","candidates":["pt_us","pt_imp"],"planned":[],"note":"US liquid pint (473.176473 mL), imperial pint (568.26125 mL), dry pint, and pt is also the point and the pico-tonne","resolved_by":null},{"symbol":"cal","candidates":["cal_th","cal_IT"],"planned":[],"note":"thermochemical calorie (4.184 J) and International Table calorie (4.1868 J) differ by about 0.07 percent","resolved_by":null},{"symbol":"BTU","candidates":["Btu_IT","Btu_th"],"planned":[],"note":"British thermal unit exists in several definitions (IT, thermochemical, 39 F, 59 F, 60 F, mean)","resolved_by":null},{"symbol":"Btu","candidates":["Btu_IT","Btu_th"],"planned":[],"note":"same as BTU","resolved_by":null},{"symbol":"btu","candidates":["Btu_IT","Btu_th"],"planned":[],"note":"same as BTU","resolved_by":null},{"symbol":"mile","candidates":["mi","mi_us_survey"],"planned":["mi_nautical_uk"],"note":"international mile, US survey mile and nautical miles differ","resolved_by":null},{"symbol":"hp","candidates":["hp_mech","hp_metric"],"planned":["hp_electric","hp_boiler"],"note":"mechanical (745.7 W), metric (735.5 W), electrical (746 W) and boiler horsepower differ","resolved_by":null},{"symbol":"ppm","candidates":[],"planned":["ppmw","ppmv","ppmmol"],"note":"parts per million by mass, by volume or by amount of substance are different quantities (composition kinds arrive in M2)","resolved_by":null},{"symbol":"yr","candidates":["yr_julian","yr_common"],"planned":[],"note":"Julian year (365.25 d), common year (365 d), tropical and sidereal years differ; a calendar year has 365 or 366 days","resolved_by":null},{"symbol":"year","candidates":["yr_julian","yr_common"],"planned":[],"note":"same as yr","resolved_by":null},{"symbol":"acre","candidates":["acre_int","acre_us_survey"],"planned":[],"note":"international acre (4046.8564224 m^2) and US survey acre (about 4046.8726 m^2) differ by about 2 ppm","resolved_by":null},{"symbol":"qt","candidates":["qt_us","qt_imp"],"planned":[],"note":"US liquid quart (946.352946 mL), imperial quart (1.1365225 L) and the dry quart differ","resolved_by":null},{"symbol":"cup","candidates":["cup_us"],"planned":[],"note":"US cup (236.5882365 mL), metric cup (250 mL), imperial cup and the US customary legal cup (240 mL) differ","resolved_by":null},{"symbol":"tbsp","candidates":["tbsp_us"],"planned":[],"note":"US (14.78676478125 mL), metric (15 mL), UK and Australian (20 mL) tablespoons differ","resolved_by":null},{"symbol":"tsp","candidates":["tsp_us"],"planned":[],"note":"US (4.92892159375 mL) and metric (5 mL) teaspoons differ","resolved_by":null},{"symbol":"a","candidates":["yr_julian","yr_common","ar"],"planned":[],"note":"a is the year (annum) and, in NIST SP 811, the are (100 m^2); the year is 365, 365.25 or 365.2425 days depending on the definition","resolved_by":null},{"symbol":"month","candidates":[],"planned":["month_30","month_julian"],"note":"a month has 28 to 31 days; there is no fixed length, so a month is never guessed (30 d and the mean Julian month of 30.4375 d are planned)","resolved_by":null},{"symbol":"mo","candidates":[],"planned":["month_30","month_julian"],"note":"same as month","resolved_by":null}],"config":[],"mappings":[],"densities":[]}