Predefined functions in the system library

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Classification	Function	Purpose
Clinical Functions	_CalculateBMI	Calculates the Body-Mass Index, based on height and weight.
–	_CalculateBSA	Calculates the body surface area.
–	_CalculateWaistHipRatio	Calculates the waist-to-hip ratio.
Clinical Validation Functions	_CheckPatientInitials	Checks the format of the subject initials.
Date Manipulation Functions	_CalculateDateTime	Calculates a new date and time by adding an interval to or subtracting an interval from another date and time. The interval is based on a date part, for example, a number of days.
–	_CompareDates	Compares two date times to determine whether the first date time is less than, equal to, or greater than the second date time.
–	_CompareDatesWithRange	Compares two date times to determine whether they are within a specified range of each other.
–	_GetCurrentDate	Returns the current date and time on the Oracle Health Sciences InForm server.
–	_GetDateDifference	Returns the number of units between two specified dates, based on the requested date part.
–	_NormalizeDate	Normalizes a date based on the specified template.
–	_NormalizeDateToMax	Normalizes UNKNOWN or EMPTY date time parts to the maximum values for those parts.
Date/Time, Float, Integer, or Text Array Comparison Functions These functions take different parameters depending on the data type of the value to which you are comparing the values in the array.	_Count	Counts the number of occurrences of a specified value in an array.
–	_IsValueGreaterThanArray	Checks whether a specified value is greater than all values in an array.
–	_IsValueGreaterThanOrEqualToArray	Checks whether a specified value is greater than or equal to at least one of the values in an array.
–	_IsValueInArray	Checks whether a specified value is equal to one of the values in an array.
–	_IsValueLessThanArray	Checks whether a specified value is less than all values in an array.
–	_IsValueLessThanOrEqualToArray	Checks whether a specified value is less than or equal to at least one of the values in an array.
EDC	GetScreeningNumber	Returns the screening number of the subject in the Oracle Health Sciences InForm application.
–	GetSiteLocale	Returns the locale of the study site, such as en-US or ja-JP.
–	GetSiteMnemonic	Returns the mnemonic (abbreviated site name, specified in the Admin area of the Oracle Health Sciences InForm application) for the site of the current subject.
–	GetSiteTime	Returns the current time at the data-entry site.
–	GetSubjectNumber	Returns the number of the subject in the Oracle Health Sciences InForm application.
–	GetTrialName	Returns the name of the trial in the Oracle Health Sciences InForm application.
–	GetUserName	Returns the name of user who is currently logged in to the Oracle Health Sciences InForm application.
–	Randomize	Returns a drug kit number based on the randomization type and the sequence and drug kit numbers stored in the randomization source database on the Oracle Health Sciences InForm host computer.
Rule Event Functions	_SaveToDb (String, String)	Determines whether to send data to the Oracle Health Sciences InForm Publisher queue.