The DateTime Field option of DocumetnsCorePack allows you to perform basic calculations on dates and times. This article describes the syntax that can be used for those calculations.

1. The basic syntax
   Fields from Dynamics are enclosed by << and >> when you insert them from the treeview.
   
   
   Figure 1: Fields

    

2. The difference between two dates can be subtracted by using a '-'
   
   
   Figure 2: Difference between two dates

    

3. Functions on a date can be executed by adding a dot (.) and the function name including the necessary parameters. 
   
   
   Figure 3: Function call with parameters

    

4. Supported functions and operators
   

   Operator Name	Sign
   Difference	-

   
   

   Function	Description	Examples
   Add(value, unit)	Adds a numeric value to the current date. The first parameter represents the numeric value that should be added. The second parameter represents the unit.  Parameters for units are either: year, month, weeks, days, hours, minutes, seconds, milliseconds	<<createdon>>.Add(10,year)
   Subtract(value, unit)	Subtracts a numeric value form the current date. The first parameter represents the numeric value that should be subtracted. The second parameter represents the unit.  Parameters for units are either: year, month, weeks, days, hours, minutes, seconds, milliseconds	<<createdon>>.Subtract(10,year)
   Addbusinessdays(value)	Adds a certain amount of days to the current date. Weekends (Saturday and Sunday) are excluded from this calculation.	<<createdon>>.Addbusinessdays(10)
   Round(unit, direction)	Round allows you to modify a time value to the next or previous quarter, half or full hour. The first parameter can display a quarter, half or full hour.  The second parameter represents the direction. (up/down)	<<createdon>>.Round(quarter,up)  <<createdon>>.Round(half,down)  <<createdon>>.Round(full)
   DATETIME()	This call returns the current date and can be used as field followed with any of the above methode calls.	DATETIME().add(5,days)

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Please Note: You can not join several functions calls. If you would like to added days and months please always use the lowest unit for your call.
e.g. 1 Month and 15 Days would be 45 Days 

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