#,Field,Description
1,id,overall primary id of the record
2,species,species after spell-checking and resolution (WFO)
3,group,group after spell-checking and resolution (WFO)
4,order,order after spell-checking and resolution (WFO)
5,family,family after spell-checking and resolution (WFO)
6,genus,genus after spell-checking and resolution (WFO)
7,epithet,species epithet after spell-checking and resolution (WFO)
8,epithet_infraspecific,infraspecific epithet after spell-checking and resolution (WFO)
9,authority,taxonomic authority after spell-checking and resolution (WFO)
10,status_taxonomic,"taxonomic status after spell-checking and resolution (WFO): ""accepted"", ""unresolved"", “unchecked”"
11,rank_taxonomic,"taxonomic rank after spell-checking and resolution (WFO):  ""genus"", ""species"", ""subspecies"", ""variety"", ""hybrid"""
12,source_taxonomic,identifier after spell-checking and resolution (WFO)
13,wsg,wood specific gravity / basic wood density
14,plant_agg,"is measurement aggregated over several individuals: 0 or 1, or NA if unclear"
15,plants_sampled,"number of individuals aggregated over: > 1, if plant_agg == 1, else 1 or NA"
16,location_sample,"the within-tree location of the sample: ""root"",""bole"",""branch"",""twig"", ""shoot”, NA"
17,type_tissue,"the type of woody tissue sampled: ""sapwood"",""heartwood"",""bark"", ""total (bark to pith)"""
18,region,"one of nine regions: ""South America"", ""Central America and West Indies"", ""North America"", ""Asia"", ""South-East Asia"", ""Africa"", ""Indian Ocean"", ""Europe"", ""Oceania"""
19,country,country of measurement
20,site,"site of measurement, at various levels of precision"
21-22,longitude/latitude,coordinates of the site of measurement
23,type_forest,"type of forest, can contain locally specific types"
24-26,id_plant/age/dbh,"Individual plant-level information on IDs, age and diameter"
27,experiment,"is the study an experiment?  if collected during an experiment 1, else 0"
28,experiment_design,design of the study or experiment if applicable
29,source_short,the short name of the source of measurements
30,source_long,the full name of the source of measurements
31,contributor,the contributor of the data set
32,id_dboriginal,the id of the sample in the original database
33,species_reference,the taxon supplied to the GWDD v.2
34,genus_reference,the genus supplied to the GWDD v.2
35,epithet_reference,the epithet supplied to the GWDD v.2
36,epithet_infraspecific_reference,the infraspecific epithet supplied to the GWDD v.2
37,"species_reference_
canonical","the taxon supplied to the GWDD v.2., stripped of additional information such as taxonomic authorities"
38,value_reference,the (untransformed) wood density supplied to the GWDD v.2
39,quantity_reference,"the type of wood density that was measured: ""Airdry SG/Density"", ""Ovendry SG/Density"",
""Basic SG/Density"""
40,moisture_airdry,"the moisture at which wood was considered airdry  (%): 8, 12, 15 if airdry, else NA"
41,wsg_conversion,"the conversion factor to convert airdry or ovendry densities: 1.0 (Basic SG), 0.8676046 (Ovendry SG), 0.8404015 (8% SG), 0.8281316 (12% SG), 0.8194401 (15% SG)"
42,backtransformed,is the value backconverted from the GWDD v.1? 0 or 1 (only applied to legacy data)
43,type_sample,"the type of sample: ""core"", ""disk"""
44,instrument,the instrument used to obtain wood density
45,temperature_drying,the temperature at which samples have been dried