anchor.diff:  angstrom_coef_a_month,21,AMTH,4,AMTH,46,,"Angstrom A coefficient, monthly",unitless,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,,,,1,-1,0,,
   angstrom_coef_b_month,21,BMTH,4,BMTH,47,,"Angstrom B coefficient, monthly",unitless,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,,,,1,-1,0,,
   rainfall_parm_alpha,19,ALPHA,5,ALPHA,48,,"Rainfall distribution scale parameter,",1/mm2,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,,,D,1,-1,0,,
  +rainfall_total,14,RTOT,4,RTOT,,,Rainfall total,mm/mo,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,0,,,1,-1,0,,
   month,5,MONTH,5,fd_MONTH,,,Month of year,number,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,,MTH,,,,1,-1,0,,
   prob_dry-wet_sequence,21,PDW,3,PDW,,,Probability of a dry-wet sequence,number,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,,,,1,-1,0,,
   rainy_days,10,RNUM,4,RNUM,,,Rainy days,number/month,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,0,,,1,-1,0,,
  -rainfall_total,14,RTOT,4,RTOT,,,Rainfall total,mm/mo,single,,WEATHER,WEATHER_STATION,WEATHER_GENER_PARMS,,5046,,.,.,0,,,1,-1,0,,
   weather_date,,W_DATE,,W_DATE,-99,,"Date for daily weather, field observations, etc.",date,date,,WEATHER,WEATHER_STATION,WEATHER_DAILY,,5052,,,,,,,1,,0,,
   weather_id,10,WID,,WID,0,1,unique id to link to weather data,number,single,,WEATHER,WEATHER_STATION,WEATHER_DAILY,,5052,,,,,,,1,-2,0,,
   weather_station_id,18,WST_ID,6,WST_ID,1,,Weather station identifier to link to site/field information,code,single,,WEATHER,WEATHER_STATION,WEATHER_DAILY,,5052,,,,,,,1,-2,0,,
  
positive.code: site_type,9,SITE_TYPE,9,SITE_TYPE,10,,"Type of site, e.g., station, on-farm",code,text,,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,,0,,
  management_type,15,MGMT_TYPE,9,MGMT_TYPE,11,,"Whether managed by researchers, producers",code,text,,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,,0,,
  experiment_duration,19,EXP_DUR,7,EXP_DUR,12,,Duration of experiment in years,year,single,,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,,0,,
  cropping_system,15,CR_SYSTEM,9,CR_SYSTEM,13,,Cropping system descriptive name,text,text,60,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,,0,,
  rotation,8,ROTATION,9,ROTATION,13,,"Crop rotation indicator (=1 for continuous, multi-year simulation, =0 for single year simulations with multiple initializations)",code,text,1,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,,0,,
  distrib_restrictions,20,EX_DISTRIB,10,EX_DISTRIB,21,,Distribution limitations for the data set,text,memo,,EXPERIMENT,METADATA,GENERAL,,1011,"2013-02-14, CHP",.,.,,,,1,-1,0,,
  file_version,12,VERSION,7,VERSION,31,,File version for ICASA standard,text,text,78,EXPERIMENT,METADATA,GENERAL,,1011,,.,.,,,,1,-1,0,,
  revision_date_first,19,REV_DATE_FIRST,14,REV_DATE_FIRST,32,,Date the file was first created,date,,,EXPERIMENT,METADATA,GENERAL,,1011,,.,.,,,,1,-1,0,,
  revision_date_latest,20,REV_DATE_LATEST,15,REV_DATE_LATEST,33,,Date the file was last revised,date,,,EXPERIMENT,METADATA,GENERAL,,1011,,.,.,,,,1,-1,0,,
  revision_notes,,REVISION_NOTES,14,REVISION_NOTES,34,,Notes describing reasons for the revision,text,memo,,EXPERIMENT,METADATA,GENERAL,,1011,,,,,,,1,-1,0,,
  suite_id,8,SUITEID,7,SUITEID,1,,Suite identifiers,text,text,,EXPERIMENT,METADATA,GENERAL,AGMIP,1012,"2013-02-04, JWW",,,,,,0,-1,0,,
  AgMIP_date_rated,16,AGMIP_DATE,10,AGMIP_DATE,1,,Date of AgMIP rating,date,,,EXPERIMENT,METADATA,GENERAL,AGMIP,1012,,,,,,,2,-2,0,,
  AgMIP_rater,11,AGMIP_RATER,11,AGMIP_RATER,2,,Initials of person assigning AgMIP rating,text,,,EXPERIMENT,METADATA,GENERAL,AGMIP,1012,,,,,,,2,-2,0,,
  AgMIP_rating,12,AGMIP_RATING,12,AGMIP_RATING,3,,"AgMIP sentinel site rating (gold, silver, etc.)",code,,,EXPERIMENT,METADATA,GENERAL,AGMIP,1012,,,,,,,2,-2,0,,
  data_source,11,DATA_SOURCE,11,DATA_SOURCE,4,,"Original format of  data (DSSAT, APSIM, CIMMYT, field log, etc)",code,,,EXPERIMENT,METADATA,GENERAL,AGMIP,1012,,,,,,,2,-1,0,,
  
negative.code: researcher_name_mi,18,MID_INITIAL,13,MID_INITIAL,4,,Middle initial of researchers involved with the experiment(s) or data,text,text,10,EXPERIMENT,METADATA,PERSONS,,1031,,,,,,,1,-2,0,,
  researcher_role,15,PP_ROLE,7,PP_ROLE,5,,Role of researcher in experiment or dataset preparation,code,text,5,EXPERIMENT,METADATA,PERSONS,,1031,,,,,,,1,-2,0,,
  institute_ID,12,IN,2,INP,6,,Links to institution associated w person,,single,,EXPERIMENT,METADATA,PERSONS,,1031,,,,,,,1,-2,0,,
  persons_notes,13,PERSON_NOTES,6,PERSON_NOTES,7,,Additional notes on persons involved with the experiment(s),text,memo,255,EXPERIMENT,METADATA,PERSONS,,1031,,,,,,,1,,1,1,
  e_mail_address,14,EX_EMAIL,6,EX_EMAIL,7,,E-mail address of researcher,text,text,255,EXPERIMENT,METADATA,PERSONS,,1031,,,,,,,1,,0,,
  institute_ID,12,IN,2,IN,1,1,id,,single,,EXPERIMENT,METADATA,INSTITUTIONS,,1041,,,,,,,1,-2,0,,
  institute_name,14,INSTITUTION,11,INSTITUTION,2,,Names of participating institutions,text,text,60,EXPERIMENT,METADATA,INSTITUTIONS,,1041,,,,,,,1,,1,1,
  institute_type,14,IN_TYPE,7,IN_TYPE,3,,Type of participating institutions,code,single,,EXPERIMENT,METADATA,INSTITUTIONS,,1041,,,,,,,1,-2,0,,
  