FEEL Basic types, operators and statements

Boolean

two possible values true or false.

true

false

String

plain text written in "quotes" or italics.

"Trisotech"

Trisotech

Number

numerical value.

1000

5.1

Date

YYYY-MM-DD format written in bold italic or as a function parameter string.

2017-11-27

date("2017-11-27")

Time

HH:MM:SS format written in bold italic or as a function parameter string.

09:12:00

time("09:12:00")

Date and Time

YYYY-MM-DDTHH:MM:SS format written in bold italic or as a function paramater string .

2017-11-27T09:12:00

date and time("2017-11-27T09:12:00")

Duration

P[n]Y[n]M[n]DT[n]H[n]M[n]S format where [n] is a number written in bold italic or as a function parameter string.

PT25M is 25 minutes

duration("PT15M") is 15 minutes

P1D is 1 day

duration("P3M") is 3 months

Null

no other valid value.

null

[n1, n2, n3]

a list of values.

[1,3,7,1] is a list of 4 numbers

["Triso", "tech"] is a list of 2 strings

=

equality

duration("P1Y2M").months = 2

"triso" = "tech"

true

false

!=

not equality

"triso" != "tech"

2 != 2

true

false

>

greater than: strict numerical order if numbers or dates, strict alphabetical order if strings

3 > 1

"a" > "f"

invoice.date > date("2017-11-27")

true

false

may be true or false

>=

greater or equal: numerical order if numbers or dates, alphabetical order if strings.

6 / 2 >= 3

PT25M >= P1D

invoice.number >= 52416

true

false

may be true or false

<

smaller than: strict numerical order if numbers or dates, strict alphabetical order if strings

1 < 3

date("2018-11-27") < date("2017-11-27")

customer.age < 65

true

false

may be true or false

⇐

smaller or equal: numerical order if numbers or dates, alphabetical order if strings.

PT25M ⇐ P1D

14 ⇐ 2 * 3

customer.age < 65

true

false

may be true or false

and

conjunction

(2+2=4) and "a" < "b"

true and false

true

false

or

disjunction

duration("P1Y2M").months = 2 or (2*2=4)

true or false

true

true

not

negation

not(2=4)

not(true)

true

false

+

addition if numbers, concatenation if strings

5 + 15

"Triso" + "tech"

2017-12-31 + P1D

20

"Trisotech"

2018-01-01

-

substraction

10 - 2.5

date("2012-12-25") - date("2012-12-24")

2018-01-01T00:00:00 - PT1M

7.5

P1D

2017-12-31T23:59

*

multiplication

0.2 * 100

7.5 * 2.3

3 * P1Y9M

20

17.25

P5Y3M

/

division

1 / 500

P1DT5H / 4

-5 / 6

0.002

PT7H15M

-0.8333333333333334

**

exponential

2 * * 3

1.7 * * 2

P10Y * * 2

8

2.89

null

.

extracting by dot notation.

duration("P1DT2H3M4S").minutes

duration("P1Y2M").months

3

2

…​

extracting at any depth using the descending operator.

{ a: { b: 1} }…​b

[1]

[n]

selecting an element in a list, where n is a number.

given mylist = [1,3,7,11]

mylist[2]

mylist[8]

mylist[-1]

3

null

11

[ex]

filtering a list, where ex is an expression.

[1,3,7,11][item > 5]

[7,11]

in

membership

247 in [1,247,530]

"a" in ["x","y","z"]

true

false

[x..y]

closed inclusive interval between x and y where both x and y are in the interval.

11 in [1..11]

12 in [1..11]

"c" in ["a" .."g"]

true

false

true

(x..y)

open exclusive interval between x and y where both x and y are not in the interval.

5 in (1..11)

1 in (1..11)

"abc" in ("aba".."abz")

true

false

true

[x..y)

interval between x and y where y is not in the interval.

23 in [23..161)

247 in [35..247)

"dmn" in ["bpmn".."cmmn")

true

false

false

(x..y]

interval between x and y where x is not in the interval.

161 in (23..161]

23 in (23..161]

true

false

some in satisfies

some i in [1,2,3,4] satisfies i > 3 some name in ["DMN", "BPMN", "CMMN"] satisfies string length(name) = 3

true

true

every in satisfies

every name in ["DMN", "BPMN", "CMMN"] satisfies ends with(name,"MN")

every name in ["DMN", "BPMN", "CMMN"] satisfies starts with(name,"D")

every i in [1,2,3] satisfies i ⇐ 3

true

false

true

if then else

if client.age > 18 then "Accepted" else "Refused"

for in return

iterate over a list.

for i in [1,2,3,4] return i*i

for x in ["DMN","BPMN","CMMN"] return substring before(x,"MN")

for num in 1..7 return if (num =1 or num =2) then 1 else (partial[-2] + partial[-1])

[1,4,9,16]

["D","CP","CM"]

[1,1,2,3,5,8,13]

between x and y

membership.

5 between 1 and 100

5 between 1 and 10 = (5 >= 1 and 5 ⇐ 10)

"g" between "a" and "z"

true

true

true