Value types
Mathematical apparatus implemented in the calculation process D2000 Calc (eval tags) and in process D2000 Event Handler (events) operates with these basic value types:
- Boolean - logical type
- Integer - integer (cardinal) type
- Real - real type
- Absolute time
- Time interval (relative time)
- Text
- HBJ - reference to an object
Boolean type
The values of Boolean type are labelled by the predefined identifiers @TRUE and @FALSE.
Integer type
The value range of an Integer type is -2147483648 .. 2147483647.
Real type
The value range of Real type is 2.3x10308 ≤ |x| ≤ 1.7x10308 and zero value (0).
Absolute time type
The forms of values of Absolute time type are hh:mm:ss DD-MM-YYYY or hh:mm:ss DD-MM-YY
- hh - hour,
- mm - minute,
- ss - second,
- DD - day,
- MM - month,
- YYYY or YY - year
Time interval (relative time) type
The form of values of Relative time type is DDD hh:mm:ss
- DDD - number of days,
- hh - hours,
- mm - minute
- ss - second.
The time interval may be also expressed by a real number as a number of seconds.
Text type
Value of Text type represents a sequence of characters with the maximal length of 2500 symbols enclosed in the quotes (e.g. "text" or 'text'). To display the characters " or ' in a value of Text type, use the character twice (e.g. "text:""hallo""" or 'text:''hallo''').
In case, that a text value exceeds this limit, the system "trims" it automatically to 2500 characters and assigns the attribute s_val_Weak (Weak) to the value.
HBJ type
A value containing an internal identifier of the D2000 system that uniquely determines an object. It is used in some special cases. It is compatible with the Integer type.