Day.Sunday
Day.Monday
Day.Tuesday
Day.Wednesday
Day.Thursday
Day.Friday
Day.Saturday
TraceLevel.Critical
TraceLevel.Error
TraceLevel.Information
TraceLevel.Verbose
TraceLevel.Warning
Occurrence.First
Occurrence.Last
Occurrence.All
Order.Ascending
Order.Descending
RoundingMode.AwayFromZero
RoundingMode.Down
RoundingMode.ToEven
RoundingMode.TowardZero
RoundingMode.Up
MissingField.Error
MissingField.Ignore
MissingField.UseNull
QuoteStyle.Csv
QuoteStyle.None
JoinKind.Inner
JoinKind.LeftOuter
JoinKind.RightOuter
JoinKind.FullOuter
JoinKind.LeftAnti
JoinKind.RightAnti
GroupKind.Global
GroupKind.Local
ExtraValues.List
ExtraValues.Ignore
ExtraValues.Error
JoinAlgorithm.Dynamic
JoinAlgorithm.PairwiseHash
JoinAlgorithm.SortMerge
JoinAlgorithm.LeftHash
JoinAlgorithm.RightHash
JoinAlgorithm.LeftIndex
JoinAlgorithm.RightIndex
JoinSide.Left
JoinSide.Right
Precision.Double
Precision.Decimal
RelativePosition.FromEnd
RelativePosition.FromStart
TextEncoding.Ascii
TextEncoding.BigEndianUnicode
TextEncoding.Unicode
TextEncoding.Utf8
TextEncoding.Utf16
TextEncoding.Windows
Any.Type
Binary.Type
Date.Type
DateTime.Type
DateTimeZone.Type
Duration.Type
Int8.Type
Int16.Type
Int32.Type
Int64.Type
Function.Type
List.Type
Logical.Type
None.Type
Number.Type
Record.Type
Table.Type
Text.Type
Time.Type
null

----------------------------------------------------

[
	["constant", "Day.Sunday"],
	["constant", "Day.Monday"],
	["constant", "Day.Tuesday"],
	["constant", "Day.Wednesday"],
	["constant", "Day.Thursday"],
	["constant", "Day.Friday"],
	["constant", "Day.Saturday"],
	["constant", "TraceLevel.Critical"],
	["constant", "TraceLevel.Error"],
	["constant", "TraceLevel.Information"],
	["constant", "TraceLevel.Verbose"],
	["constant", "TraceLevel.Warning"],
	["constant", "Occurrence.First"],
	["constant", "Occurrence.Last"],
	["constant", "Occurrence.All"],
	["constant", "Order.Ascending"],
	["constant", "Order.Descending"],
	["constant", "RoundingMode.AwayFromZero"],
	["constant", "RoundingMode.Down"],
	["constant", "RoundingMode.ToEven"],
	["constant", "RoundingMode.TowardZero"],
	["constant", "RoundingMode.Up"],
	["constant", "MissingField.Error"],
	["constant", "MissingField.Ignore"],
	["constant", "MissingField.UseNull"],
	["constant", "QuoteStyle.Csv"],
	["constant", "QuoteStyle.None"],
	["constant", "JoinKind.Inner"],
	["constant", "JoinKind.LeftOuter"],
	["constant", "JoinKind.RightOuter"],
	["constant", "JoinKind.FullOuter"],
	["constant", "JoinKind.LeftAnti"],
	["constant", "JoinKind.RightAnti"],
	["constant", "GroupKind.Global"],
	["constant", "GroupKind.Local"],
	["constant", "ExtraValues.List"],
	["constant", "ExtraValues.Ignore"],
	["constant", "ExtraValues.Error"],
	["constant", "JoinAlgorithm.Dynamic"],
	["constant", "JoinAlgorithm.PairwiseHash"],
	["constant", "JoinAlgorithm.SortMerge"],
	["constant", "JoinAlgorithm.LeftHash"],
	["constant", "JoinAlgorithm.RightHash"],
	["constant", "JoinAlgorithm.LeftIndex"],
	["constant", "JoinAlgorithm.RightIndex"],
	["constant", "JoinSide.Left"],
	["constant", "JoinSide.Right"],
	["constant", "Precision.Double"],
	["constant", "Precision.Decimal"],
	["constant", "RelativePosition.FromEnd"],
	["constant", "RelativePosition.FromStart"],
	["constant", "TextEncoding.Ascii"],
	["constant", "TextEncoding.BigEndianUnicode"],
	["constant", "TextEncoding.Unicode"],
	["constant", "TextEncoding.Utf8"],
	["constant", "TextEncoding.Utf16"],
	["constant", "TextEncoding.Windows"],
	["constant", "Any.Type"],
	["constant", "Binary.Type"],
	["constant", "Date.Type"],
	["constant", "DateTime.Type"],
	["constant", "DateTimeZone.Type"],
	["constant", "Duration.Type"],
	["constant", "Int8.Type"],
	["constant", "Int16.Type"],
	["constant", "Int32.Type"],
	["constant", "Int64.Type"],
	["constant", "Function.Type"],
	["constant", "List.Type"],
	["constant", "Logical.Type"],
	["constant", "None.Type"],
	["constant", "Number.Type"],
	["constant", "Record.Type"],
	["constant", "Table.Type"],
	["constant", "Text.Type"],
	["constant", "Time.Type"],
	["constant", "null"]
]

----------------------------------------------------

Checks for contant.