Build 
Definition  Identifies the build number and patch level of the software that inserted/updated this row. The format is the Build number followed by 3 digits for the patch level which is typically 000. The build number is tied to specific versions of the software, e.g. Sunrise 15.3 is Build 5021, Sunrise 16.3 is Build 5503. 

CreatedBy 
Definition  Information about the user that created the row. This will typically be the UserID (IDCode from CV3User table) and may be prefixed with an environment identifier followed by an underscore, e.g. b96d2bf5_jongmore. 

CreatedWhenUTC 
Definition  The date and time that the row was created including the time zone offset from UTC, for example 2015-01-30 04:55:04.372 -05:00. The date and time is based on the Enterprise Time Zone. 

MSRowVersion 
Definition  Optimistic lock identifier using rowversion datatype. 

MSReplrowguid 
Definition  Unique GUID used to support merge replication. 

BlockPrivilegeXREFID 
Definition  Auto generated unique primary key value. 

BlockDefinitionID 
Definition  A foreign key to the BlockDefinitionID column in the SXAESBlockDefinition table. 

PrivilegeType 
Definition  Store Privilege Type 3 = View Block, 4 = Create/Maintain/Release Block 

SelectionType 
Definition  Store Selection Type 1 = By User, 2 = By Security Group, 3 = By Security Right 

SelectionTypeGUID 
Definition  Store the GUID of the Selection Type