anchor.diff:  fraction,fraction_mass_perc,Fraction proportion of sample mass - percent,,,,sample,numeric,value,percent,,,
   gas,gas_name,Gas Sample Name - ,,,,sample,,,,,,
   gas,gas_number,Laboratory Gas Sample Number - ,,,,sample,character,method,,,,
  -gas,gas_type,Gas Type - (gas_type),,,,sample,factor,method,(gas_type),,,
  +gas,gas_type,Gas Type - (gas_type),,,,sample,factor,method,,,,
   gas,gas_note,Gas Sample Notes - ,,,,sample,character,method,,,,
   gas,gas_time_series,Gas Time Series Name - ,,,,sample,character,method,,,,
   gas,c_method,Gas Carbon Analysis Method - ,,,,sample,character,method,,,,
  -gas,collection_method,Gas Sample Collection Method - (core_pit),,,,sample,factor,method,(core_pit),,,
  +gas,collection_method,Gas Sample Collection Method - (core_pit),,,,sample,factor,method,,,,
   gas,collection_loc,Field Vs. Incubation - ,,,,sample,character,method,,,,
   gas,15n,Gas δ15N - permil,,,,sample,numeric,value,permil,,,
   gas,c_conc_CO2,CO2 Concentration - ppm,,,,sample,numeric,value,ppm,,,
   gas,13c_CO2,Gas δ13C (C02) - permil,,,,sample,numeric,value,permil,,,
   gas,14c_CO2,Gas Δ14C (C02) - permil,,,,sample,numeric,value,permil,,,
  -gas,14c_CO2_sigma,Gas Δ14C Standard Deviation (CO2) - permil,,,,sample,numeric,sigma,permil,,,
  +gas,14c_CO2_sigma,Gas Δ14C Standard Deviation (CO2) - permil,,,,sample,numeric,sigma,,,,
   gas,14c_age_CO2,Gas Uncalibrated Radiocarbon Age (CO2) - ,,,,sample,numeric,value,,,,
   gas,14c_age_CO2_sigma,Gas Uncalibrated Radiocarbon Age Standard Deviation (CO2) - ,,,,sample,numeric,sigma,,,,
   gas,fraction_modern_CO2,Gas Fraction Modern (CO2) - ,,,,sample,numeric,value,,,,
  
positive.code: site,soc_type,Site Calculated Soil Organic Carbon Stock Type - (ccon_type),soc,,,sample,character,method,,,,
  site,soc_pcount,Site Calculated Soil Organic Carbon Stock Profile Count - ,soc,,,sample,character,method,,,,
  site,soc_depth,Site Calculated Soil Organic Carbon Stock Depth - cm,soc_depth,,,sample,numeric,value,cm,,,
  site,soc_sigma,Site Calculated Soil Organic Carbon Stock Standard Deviation - g cm-2,soc,,,sample,numeric,sigma,g cm-2,,,
  site,soc_method,Site Calculated Soil Organic Carbon Stock Method - ,soc,,,sample,character,method,,,,
  cluster,cluster_name,Cluster Name - ,cluster_name,,,field,factor,,,,,
  cluster,cluster_note,Cluster Notes - ,cluster_note,,,field,character,,,,,
  profile,profile_name,Profile/Plot Name - ,profile_name,name for profile,,field,factor,,,,,
  profile,profile_note,Profile Notes - ,profile_note,,,field,character,,,,,
  profile,profile_method,Profile Sampling Method - ,profile_method,,,field,character,,,,,
  profile,observation_date,Observation Date - YYYY-MM-DD or MM/DD/YYYY,observation_date,day the sample was taken,,field,character,,,,,
  
negative.code: sheet,header,headerLong,var,varLong,flagID,dataframe,class,softType,hardUnit,hardValue,hardSigma,hardMethod
  ,,,download_url,,,,,,,,,
  metadata,curator_name,Curator Name - ,curator_name,name of person curating dataset,,study,character,,,,,
  metadata,curator_organization,Curator Organization - ,curator_organization,organization responsible for curation,,study,character,,,,,
  