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The Boolean functions are used to evaluate and return one of two possible values—True or False. Within EQuIS Collect, the functions can be used to evaluate data as they are entered in forms on the Mobile app. The Boolean functions can also be used to show or hide specified fields in forms on the Mobile app. Within EQuIS Link, the functions provide a means to transform data when loading to a selected format.  

 

Below is a descriptive list of each Boolean function and its operations. The examples are applicable to either fields in a Collect form or an EQuIS Link data source, unless otherwise noted.

ALLIN

The ALLIN function returns TRUE if all the comma delimited values in the first parameter are found in the combined lists of comma delimited values of the subsequent parameters. Returns NULL if any of the parameters are NULL before all values are found, TRUE if all values are found, or FALSE otherwise.

ALLIN(<Parameter_1>,<Parameter_2…<Parameter_N>)

Aggregate = No

 

Example 1

 

ALLIN([FieldA],[FieldB],[FieldC],[FieldD],[FieldE]) = TRUE

 

Example 2

 

ALLIN([FieldA],[FieldB],[FieldC],[FieldD],[FieldE]) = FALSE

AND

Function AND returns TRUE if all parameters values evaluate to true, NULL if any of the parameters are NULL or cannot be interpreted as Boolean before encountering a FALSE value, and FALSE if any of the parameter values are FALSE.

AND(<Parameter_1>,<Parameter_2>…<Parameter_N>)

Aggregate = No

 

Example 1

 

AND(EQ([FieldA],6),LT([FieldB],[FieldC])) = TRUE

 

Example 2

 

AND(EQ([FieldA],6),LT([FieldD],[FieldC])) = FALSE

 

Example 3

 

AND(EQ([FieldA],[FieldD])) = FALSE

BETWEEN

The BETWEEN function returns TRUE if the third parameter is between the first two parameters. Returns FALSE if any of the parameters are NULL or if the third parameters value is not between the first and second parameter values.

BETWEEN(<Parameter_1>,<Parameter_v2>,{<Parameter_3>})

Aggregate = No

 

Example 1

 

BETWEEN([FieldB],[FieldA],[FieldC]) = TRUE

 

Example 2

 

BETWEEN([FieldB],[FieldA],[FieldD]) = FALSE

 

Example 3

 

BETWEEN([FieldA],[FieldB],[FieldC]) = TRUE

 

Example 4

 

BETWEEN([FieldA],[FieldB],[FieldD]) = FALSE

EQ

The EQ function returns TRUE if all parameters are equal. This function will first check if the values are all of the same type, and if yes, use that type. If the values are not of the same type, the function will cycle through a list of data types to find a common data type to which all parameters can be converted. The function then converts the parameters' data types and compares them. Returns NULL if any of the parameters are NULL.

EQ(<Parameter_1>,<Parameter_2>…<Parameter_N>)

Aggregate = No

 

Example 1

 

EQ([FieldA],[FieldB]) = TRUE

 

Example 2

 

EQ([FieldA],[FieldB],[FieldC]) = FALSE

 

Example 3

This example demonstrates how data type conversions can alter how the EQ function evaluates parameters. The string in FieldB is converted to an integer value of "5", which is then compared to the integer value in FieldA.

 

EQ([FieldA],[FieldB]) = EQ(5,5) = TRUE

FALSE

The FALSE function always returns FALSE. The function can be used to hide a specified field on Collect forms.

FALSE(<Parameter_1>,<Parameter_2>…<Parameter_N>)

Aggregate = No

 

Example 1

 

FALSE([FieldA],[FieldB],[FieldC]) = FALSE

FIELDEXISTS

The FIELDEXISTS function returns TRUE or FALSE depending on if a field exists in the Source Data table or Reference Data table.

FIELDEXISTS(<StringParameter_1>)

Aggregate = No

 

Example 1

 

FIELDEXISTS([FieldB]) = TRUE

 

Example 2

 

FIELDEXISTS([FieldD]) = FALSE

 

GE

The GE function returns TRUE if the first parameter is greater than or equal to the second parameter or FALSE if not. This function will first check if the values are of the same type, and if yes, use that type. If the values are not of the same type, the function will cycle through a list of data types to find a common data type to which the parameters can be converted. The function then converts the parameters' data types and compares them. Returns NULL if any of the parameters are NULL.

GE(<Parameter_1>,<Parameter_2>)

Aggregate = No

 

Example 1

 

GE([FieldA],[FieldE]) = TRUE

 

Example 2

 

GE([FieldC],[FieldD]) = TRUE

 

Example 3

 

GE([FieldE],[FieldB]) = FALSE

GT

The GT function returns TRUE if the first parameter is greater than the second parameter or FALSE if not. This function will first check if the values are of the same type, and if yes, use that type. If the values are not of the same type, the function will cycle through a list of data types to find a common data type to which the parameters can be converted. The function then converts the parameters' data types and compares them. Returns NULL if any of the parameters are NULL.

GT(<Parameter_1>,<Parameter_2>)

Aggregate = No

 

Example 1

 

GT([FieldB],[FieldA]) = TRUE

 

Example 2

 

GT([FieldB],[FieldC]) = FALSE

 

Example 3

 

GT([FieldE],[FieldD]) = FALSE

IN

The IN function returns TRUE if any of the comma-delimited words in the first parameter are found in any of the comma-delimited words in any of the following parameters. Returns NULL if the first parameter is NULL or if a NULL value is encountered before finding a match, and FALSE if no match or NULL values are found.

IN(<Parameter_1>,{<Parameter_2>…<Parameter_N>})

Aggregate = No

 

Example 1

 

IN([FieldA],[FieldB],[FieldC],[FieldD) = TRUE

 

Example 2

 

IN([FieldA],[FieldB],[FieldC],[FieldD) = FALSE

ISEMPTY

The ISEMPTY function returns TRUE if one of the parameters is NULL, empty, or contains only spaces or tabs (white space) and returns FALSE otherwise.

ISEMPTY(<StringParameter_1>,<StringParameter_2>…<StringParameter_N>)

Aggregate = No

 

Example 1

 

ISEMPTY([FieldA],[FieldB],[FieldC]) = TRUE

 

Example 2

 

ISEMPTY([FieldA],[FieldB],[FieldC]) = FALSE

ISNULL

The ISNULL function returns TRUE if any of the parameters are NULL or empty, otherwise it returns FALSE.

ISNULL(<Parameter_1>,<Parameter_2>…<Parameter_N>)

Aggregate = No

 

Example 1

 

ISNULL([FieldA],[fieldB],[FieldC],[FieldD) = TRUE

 

Example 2

 

ISNULL([FieldA],[FieldB],[FieldD]) = FALSE

 

ISNUMERIC

The ISNUMERIC function returns TRUE if the parameter is not NULL and is convertible to a numeric value.

ISNUMERIC(<Parameter_1>)

Aggregate = No

 

Example 1

 

ISNUMERIC([FieldA]) = TRUE

 

Example 2

 

ISNUMERIC([FieldA]) = TRUE

 

Example 3

 

ISNUMERIC([FieldA]) = FALSE

 

Example 4

 

ISNUMERIC([FieldA]) = FALSE

LE

The LE function returns TRUE if the first parameter is less than or equal to the second parameter or FALSE if not. This function will first check if the values are of the same type, and if yes, use that type. If the values are not of the same type, the function will cycle through a list of data types to find a common data type to which the parameters can be converted. The function then converts the parameters' data types and compares them. Returns NULL if any of the parameters are null.

 

LE(<Parameter_1>,<Parameter_2>)

Aggregate = No

 

Example 1

 

LE([FieldC],[FieldB]) = TRUE

 

Example 2

 

LE([FieldA],[FieldB]) = TRUE

 

Example 3

 

LE([FieldA],[FieldC]) = FALSE

LT

The LT function returns TRUE if the first parameter is less than the second parameter or FALSE if not. This function will first check if the values are of the same type, and if yes, use that type. If the values are not of the same type, the function will cycle through a list of data types to find a common data type to which the parameters can be converted. The function then converts the parameters' data types and compares them. Returns NULL if any of the parameters are null.

LT(<Parameter_1>,<Parameter_2>)

Aggregate = No

 

Example 1

 

LT([FieldC],[FieldA]) = TRUE

 

Example 2

 

LT([FieldA],[FieldB]) = FALSE

 

Example 3

 

LT([FieldB],[FieldC]) = FALSE

NOT

The NOT function returns the negation of a specified parameter. If the parameter is NULL or cannot be interpreted as a Boolean, then the function returns NULL.

NOT(<Parameter_1>)

Aggregate = No

 

Example 1

 

NOT(EQ([FieldA],[FieldB])) = TRUE

 

Example 2

 

NOT(EQ([FieldB],[FieldC])) = FALSE

OR

The OR function returns TRUE if any of the parameters evaluate to TRUE. Returns NULL if a NULL value or value that cannot be interpreted as a Boolean is encountered before a TRUE value parameter.

OR(<Parameter_1>,<Parameter_2>…<Parameter_N>)

Aggregate = No

 

Example 1

 

OR(EQ([FieldA],3),LT([FieldB],[FieldD])) = TRUE

 

Example 2

 

OR(EQ([FieldA],6),LT([FieldC],[FieldB])) = TRUE

 

Example 3

 

OR(EQ([FieldA],3),LT(FieldD],[FieldC])) = FALSE

 

Example 4

 

OR([FieldA],[FieldB],[FieldC],[FieldD])=NULL

OR([FieldA],[FieldB],[FieldD])=TRUE

TRUE

The TRUE function always returns TRUE. The function can be used to force a field to be required and is typically used in the Collect templates to make fields required.

TRUE()

Aggregate = No

 

Example 1 – Collect Form1

 

To make FieldA always be required, the REQUIRED attribute formula would be TRUE().