public DBTableField(
	string fieldName,
	DBTypeDefinition typeDefinition,
	string description,
	bool isNullable,
	bool isPrimaryKey,
	int ordinalPosition
)

Public Sub New ( 
	fieldName As String,
	typeDefinition As DBTypeDefinition,
	description As String,
	isNullable As Boolean,
	isPrimaryKey As Boolean,
	ordinalPosition As Integer
)