2.3.1 – 09/10/2012
Note that this date reflects when work on template version 36 was completed, not when this template version was actually released.  At the time this was written, it looked like template version 36 and Web Soil Survey 3.0 would be simultaneously released sometime in the first quarter of 2013.  Template version 36 is required for exports from Web Soil Survey 3.0, due to changes to table “sdvattribute”.

Item:  Table “sdvattribute” was updated due to changes to the aggregation engine that used to generate thematic soil maps in Windows Client Soil Data Viewer and Web Soil Survey.  While table “sdvattribute” isn’t actually part of the SSURGO standard per se, the metadata for this and the other SDV related tables are included with in the metadata tables that reside in a SSURGO Template database.

2.2.6 – 07/13/2012
Item:  Synchronized with NASIS data dictionary 6.2.7.  There were some domain changes and additions.

Item:  The logical data type of the attribute associated with each of the following 
columns was changed from Boolean to Choice, since "N/A" is now a third option.
The physcial data type of the following columns remains Text(3).
component.flhe
component.flphe
component.fltemik2use
component.fltriumph2use

2.2.5 – 04/12/2011
Item:  Synchronized with NASIS data dictionary 6.1.12.  There were some domain changes and additions.

2.2.4 – 03/12/2010
Item:  Synchronized with NASIS data dictionary 6.0.22.  There were some domain changes and additions.

2.2.3 – 11/13/2007
Item:  Synchronized with NASIS data dictionary 5.4.0.  There were some domain changes and additions.

2.2.2 - 09/01/2006
Item:  Synchronized with NASIS data dictionary 5.3.2.  There were some domain changes and additions.

2.2.1 - 10/11/2005
Item:  For survey area data committed to the Soil Data Warehouse prior to July 11, 2005, columns component.geomdesc and cogeomordesc.geomfname contained geomorphic feature names in singular form.  For survey area data committed to the Soil Data Warehouse on or after July 11, 2005, these columns now contain geomorphic feature names in plural form.  The definition of column cogeomordesc.geomfname was updated to reflect this change.  The definition of column component.geomdesc didn't specifically mention geomorphic feature names being in singular form, so that definition was not updated.

Item:  Soil Data Viewer related tables "month", "sdvalgorithm", "sdvattribute", "sdvfolder" and "sdvfolderattribute" were added.

Item:  For data in shape file format, point feature class data (point spot features and point map units) is now provided in single point format rather than in multipoint format.

Item:  Synchronized with NASIS data dictionary 5.3.1.  There were some domain changes and additions.

Item:  The field size of a number of SSURGO metadata table attributes was increased.

2.1.1 - 10/03/2003
Item:  For the survey area boundary feature class, column "ssaid" was renamed to "areasymbol".  Column "areasymbol" was added to all other feature classes.

Item:  For the spot feature line and spot feature point feature classes, column "musym" was renamed to "featsym".

Item:  Survey area spatial data is now explicitly versioned.  A spatial version number column was added to all feature classes.

Item:  Survey area data now potentially includes two new feature classes, point map units and line map units.  For any particular survey area, these feature classes are optional.

Item:  The delivery format of the feature description ASCII export file (featdesc.txt), is no longer Prelude format (a format associated with SSURGO version 1.0).  The format of this file is now the same as the format used for general tabular data files - ASCII, pipe field delimited and double quote text delimited.

Item:  Table "featdesc" was added.  Feature description data was available in previous SSURGO versions, but there was no corresponding database table.  While feature description data is considered to be part of the spatial data, the feature description data does not include any ESRI geometry column, i.e. the feature description data is not a feature class.  Data for this table is not automatically imported when other tabular data is imported.  Data for this table must be explicitly imported in a separate process.

Item:  Tables "sacatalog" and "sainterp" were added.  These tables supersede tables "distmd", "distlegendmd" and "distinterpmd".  Tables "distmd", "distlegendmd" and "distinterpmd" were left in the template database for backwards compatibility with SSURGO 2.0 exports, and SSURGO 2.1 exports include data for these tables.  These tables will likely be dropped in the next major SSURGO version.

Item:  Survey area tabular data is now explicitly versioned.  The tabular version number and corresponding date reside in table "sacatalog".

Item:  Synchronized with NASIS data dictionary 5.2.4.  There were some domain changes and additions.

Item:  Columns mapunit.mustatus and muaggatt.mustatus were changed from not null to nullable.

Item:  The following columns are still part of the SSURGO standard, but their contents will always be set to null.  These columns will likely be dropped in the next major SSURGO version:

legend.ssastatus
legend.legendsuituse
legend.legendcertstat
mapunit.mustatus
mapunit.mucertstat
muaggatt.mustatus

Item:  Within a soil survey area, map unit symbol must now be unique.

Item:  The field size of columns mdstattabcols.colphyname and mdstatidxdet.colphyname was changed from 16 to 18.

2.0.3 - 04/23/2002
Item:  Resynchronized with NASIS data dictionary 5.1.3.  There were some domain changes and additions.

Item:  The fuzzy logic result values (interpll, interplr, interphr and interphh) in table cointerp were changed from not null to nullable.

Item:  The field size of coecoclass.ecoclasstypename was changed from 254 to 60.

Item:  The field size of coecoclass.ecoclassid was changed from 248 to 30.

Item:  The data type of coforprod.fprod and coforprodo.fprod was changed from integer to smallfloat, and its precision was set to 2.

2.0.2 - 09/12/2001
Item:  Resynchronized with NASIS data dictionary 5.0.17.  There were some domain changes and additions, and some attribute descriptions were updated.

2.0.1 - Approximately 01/01/2001
Initial release of version 2.0 of the SSURGO standard.