A code explanation of the supported field-element-tags in a template-based cs-code-generator app; Granted there are extension methods at play here, but it still explains a good number of the tags, currently.

fparams-dic.cs

//
DICT <string,object> fparams = new DICT <string,object>();
//
fparams.Add("Date",  		string.Format("MM/dd/yyyy",DateTime.Now));
fparams.Add("Time",			string.Format("hh:mm.ss tttt",DateTime.Now));
fparams.Add("DateTime",			string.Format("MM/dd/yyyy hh:mm.ss tttt",DateTime.Now));
//
fparams.Add("DataName",			DataName);
fparams.Add("dataname",			DataName.ToLower());
fparams.Add("DataNameC",		dataName.Capitolize());
fparams.Add("CleanName,Nodash",		DataName.Clean());
fparams.Add("FriendlyName",		DataName.Clean());
fparams.Add("CleanName",		DataName.Replace("-","_"));
fparams.Add("FriendlyNameC",		DataName.Clean().Capitolize());
//
fparams.Add("DataType",			DataType);
fparams.Add("datatype",			DataType.ToLower());
fparams.Add("DataTypeNative",		DataTypeNative);
fparams.Add("DataTypeNativeF",		DataTypeNative);
fparams.Add("datatypenative",		DataTypeNative.ToLower());
//
// FIXME: We need to convert flash types also from Access/Ace Types.
//		  This means that we do need to know what type our origin is
//		  at this point.

fparams.Add("FlashDataType",		TypeInfo.SqlTypeStrToFlashType(DataType));
fparams.Add("FormatString",		FormatString);
//
fparams.Add("MaxLMAX",			MaxLength == -1 ? "MAX" : MaxLength.ToString());
fparams.Add("nmax",			MaxLength == -1 ? "" : string.Format("({0})",MaxLength));
fparams.Add("smax",			MaxLength == -1 ? "(MAX)" : string.Format("({0})",MaxLength));
fparams.Add("MaxLength",		MaxLength);
//
fparams.Add("CodeBlock",		CodeBlock);
fparams.Add("BlockAction",		BlockAction);
// TODO: ADDED FIELD TYPE NAMES
fparams.Add("FormType",			FormType);
fparams.Add("FormTypeClean",		FormType.Clean());
fparams.Add("formtype",			FormType.ToLower());
//
fparams.Add("IsString",			false);
fparams.Add("IsBool",			false);
fparams.Add("IsNum",			false);
//
switch (DataTypeNative)
{
	case "String": case "Char":
					fparams["IsString"] = true; break;
	default:			fparams["IsString"] = false; break;
}
//
switch (DataTypeNative)
{
	case "Boolean": 
	case "DateTime":
	case "DBNull":
	case "Empty":
	case "String":		fparams["IsNum"] = false; break;
	default:			fparams["IsNum"] = true; break;
}
//
switch (DataTypeNative)
{
	case "Boolean":		fparams["IsBool"] = (true); break;
	default:			fparams["IsBool"] = false; break;
}
//
switch (DataTypeNative)
{
	case "Single":		fparams.Add("Native","float"); break;
	case "Double":		fparams.Add("Native","double"); break;
	case "Decimal":		fparams.Add("Native","Decimal"); break;
	case "Boolean":		fparams.Add("Native","bool"); break;
//					case "BigInt":		fparams.Add("Native","Int64"); break;
	case "DateTime":	fparams.Add("Native","DateTime"); break;
	case "DBNull":		fparams.Add("Native","DBNull"); break;
	case "Empty":		fparams.Add("Native","Empty"); break;
	case "Int16":		fparams.Add("Native","short"); break;
	case "Int32":		fparams.Add("Native","int"); break;
	case "Int64":		fparams.Add("Native","long"); break;
	case "UInt16":		fparams.Add("Native","ushort"); break;
	case "UInt32":		fparams.Add("Native","uint"); break;
	case "UInt64":		fparams.Add("Native","ulong"); break;
	default:			fparams.Add("Native",DataTypeNative.ToLower()); break;
}
fparams.Add("NativeNullType",	GetNativeNullType(fparams["Native"].ToString()));
fparams.Add("NativeNullValue",	IsNativeNullable(fparams["Native"].ToString()) ? ".Value" : "");
//
if ( ((bool)fparams["IsString"] ) == true )
{
	fparams.Add("SqlFormat",	"'{0}'");
	fparams.Add("Format",		@"""{0}""");
	fparams.Add("fmax",			MaxLength == -1 ? "(max)" : string.Format("({0})",MaxLength));
}
else if ( ((bool)fparams["IsBool"] )==true )
{
	fparams.Add("Format",string.Empty);
	fparams.Add("fmax",string.Empty);
}
else if ( ((bool)fparams["IsNum"] )==true )
{
	if (useFormat) fparams.Add("fmax",maxLength==-1 ? "" : string.Format("({0})",maxLength));
}
//
switch (dataType)
{
	case "Char":
	case "NChar":
	case "NText":
	case "NVarChar":
	case "Text":
	case "VarChar":
		fparams.Add("max", MaxLength == -1 ? "(max)" : string.Format("({0})",MaxLength)); break;
	default:
		fparams.Add("max", MaxLength == -1 ? "" : string.Format("({0})",MaxLength)); break;
}
//
fparams.Add("UseFormat",	UseFormat);
fparams.Add("IsNullable",	IsNullable);
fparams.Add("DataTypeNullable",	IsNullable ? GetNativeNullType(fparams["Native"].ToString()) : fparams["Native"]);
fparams.Add("Description",	Description);
fparams.Add("DefaultValue",	DefaultValue);
return fparams;