Possible enumeration values:
| Name | Value | Description | 
|---|---|---|
| None | 
                     0  | 
                |
| BinaryConstant | 
                     1  | 
                |
| BooleanConstant | 
                     2  | 
                |
| DateTimeOffsetConstant | 
                     3  | 
                |
| DecimalConstant | 
                     4  | 
                |
| FloatingConstant | 
                     5  | 
                |
| GuidConstant | 
                     6  | 
                |
| IntegerConstant | 
                     7  | 
                |
| StringConstant | 
                     8  | 
                |
| DurationConstant | 
                     9  | 
                |
| Null | 
                     10  | 
                |
| Record | 
                     11  | 
                |
| Collection | 
                     12  | 
                |
| Path | 
                     13  | 
                |
| If | 
                     14  | 
                |
| Cast | 
                     15  | 
                |
| IsType | 
                     16  | 
                |
| FunctionApplication | 
                     17  | 
                |
| LabeledExpressionReference | 
                     18  | 
                |
| Labeled | 
                     19  | 
                |
| PropertyPath | 
                     20  | 
                |
| NavigationPropertyPath | 
                     21  | 
                |
| DateConstant | 
                     22  | 
                |
| TimeOfDayConstant | 
                     23  | 
                |
| EnumMember | 
                     24  | 
                |
| AnnotationPath | 
                     25  |