This is a document so please edit it and add, correct, &/or clarify how you see fit. Then we can all use this as a point of reference when dealing with Repeat Regions/BOM programming. If you don't want to edit it but still want to contribute, then just leave a comment. Thanks!
List of System Parameters and Model Parameters used in model/drawing (Document  CS133915):
https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS133915&art_lang=en&posno=10&q=repeat%20region%20symbols&sourc…
List of Operators and Functions:
Type
Name
syntax
Explanation
eg: Input
Eg: output
Assignment Operator
=
MyVar="string"
Defines, or assigns, a variable as a # or string
MyVar="H123"
MyVar=10
=
=
No Output but defines the variable MyVar to be:
H123
10
String Operators/Functions
Comparison Operators
==
==
A==B
#A==#B
Compares strings as equal.
Compares #s as equal
"456"=="123"
"456"=="456"
7==1
7==7
=
=
=
=
NO
YES
NO
YES
String Operators/Functions
Comparison Operators
!=, <>, ~=
A!=B
A<>B
A~=B
#A!=#B
#A<>#B
#A~=#B
Compares strings as unequal.
(checks to see if not equal or not)
Compares #s as unequal.
(checks to see if not equal or not)
"456"<>"123"
"456"<>"456"
7!=1
7<>1
7~=1
7!=7
7<>7
7~=7
=
=
=
=
=
=
=
=
YES
NO
YES
YES
YES
NO
NO
NO
String Operators/Functions
Arithmetic Operators
+
+
A+B
#A+#B
For Strings: Concatenate strings.
For Numbers: Add #s (Addition, Plus)
"456"+"123"
7+7
=
=
456123 (returns a string e.g. "456123"*1="ERROR")
14
Arithmetic Operators

#A#B
Subtract #s (Subtraction, Take away, Minus)
32
=
1
Arithmetic Operators
/
#A/#B
Divide #s (Division)
6/2
=
3
Arithmetic Operators
*
#A*#B
Multiply #s (Multiplication)
6*2
=
12
Arithmetic Operators
^
#A^#B
A to the Power of B (Exponent, Powers, Raised to)
2^3
=
8
Arithmetic Operators
()
(#A#B)*#C
Parentheses for grouping, Priority, and order of operations
(32)*4
4*(32)
=
=
4
4
Comparison Operators
==
<See String Operators above>
Comparison Operators
>
#A>#B
Greater than
Comparison Operators
>=
#A>#B
Greater than or equal to
Comparison Operators
!=, <>,~=
<See String Operators above>
Comparison Operators
<
#A<#B
Less than
Comparison Operators
<=
#A<#B
Less than or equal to
Comparison Operators

#A  #B  #C
OR
Comparison Operators
&
#A & #B & #C
AND
Comparison Operators
~,!
#A == !B
#A!=B
#A~=B
NOT (i.e. Reverse a statement, Opposite)
(
Tilde ~ doesn't work for NOT next to a #. Only next to operator =
7 == 7
7 == !7
7 == !4
7> 4
7>!4
7 != 7
7>=3
7!>=3
7~=7
7~=4
7 == ~7
7 == ~4
"ABC" == !"ABC"
=
=
=
=
=
=
=
=
=
=
=
=
=
YES
NO
NO
YES
YES (I guess even mathematically this is strange)
NO
YES
NO
NO
YES
ERROR
ERROR
ERROR
Mathematical Functions
abs
abs(#)
Returns the absolute value of a number
abs(2)
=
2
Mathematical Functions
acos
acos(#º)
Returns the arccosine of a number
ACOS(0.125)
=
1.445468496
Mathematical Functions
asin
asin(#º)
Returns the arcsine of a number
ASIN(0.125)
=
0.125327831
Mathematical Functions
atan
atan(#º)
Returns the arctangent of a number
ATAN(0.125)
=
0.124354995
Mathematical Functions
atan2
atan2(#º)
Returns the arctangent (inverse tangent), of the specified x and ycoordinates
ATAN2(2,3)
=
0.982793723
Mathematical Functions
bound
bound(#x,#lo,#hi)
Forces #x to be within the range of #lo to #hi.
If x ≤ lo, then output = lo.
If lo ≤ x ≥ hi, then output = x
If x ≥ hi, then output = hi
(kind of the opposite as DEAD(), but not exactly)
bound(0,5,15)
bound(7.25,5,15)
bound(100.2,5,15)
=
=
=
5.0
7.25
15.0
cable_len
=
Mathematical Functions
ceil
ceil(#)
Round # up
ceil(3.25)
=
4.0000
comparegraphs
=
Mathematical Functions
cos
cos(#º)
Returns the Cosine of a #
cos(2)
=
0.416146837
Mathematical Functions
cosh
cosh(#º)
Returns the hyperbolic Cosine of a #
cosh(2)
=
3.762195691
dbl_in_tol
dbl_in_tol (#x, #y, #r)
Checks to see if x and y are within the tolerance of ± r
#x, #y, #r are all real numbers
Returns TRUE if abs(xy) ≤ r
Returns FALSE if abs(xy) > r
dbl_in_tol (2, 1, 1)
dbl_in_tol (2,1,0.5)
dbl_in_tol (10,20,9)
dbl_in_tol (10,20,10)
dbl_in_tol (10,20,11)
=
=
=
=
=
YES
NO
NO
YES
YES
Mathematical Functions
dead
dead(#x,#lo,#hi)
"Defines a range of values for x, for which the result of the function is 0."
If x < lo, then output = x–lo
If lo ≤ x ≥ hi, then output = 0
If x > hi, then output = x–hi
(kind of the opposite as BOUND(), but not exactly)
bound(0,5,15)
bound(7.25,5,15)
bound(100.2,5,15)
=
=
=
5.0 (05)
0
85.2 (100.215)
Cabling, Case Study Functions
eang
eang(e_ID1, e_ID2)
Angle in radians between two entities, e_ID1 and e_ID2, of a case study
=
Cabling, Case Study Functions
ecoordx
ecoordx(e_ID1)
x coordinate of the e_ID1 entity of a case study
=
Cabling, Case Study Functions
ecoordy
ecoordy(e_ID1)
y coordinate of the e_ID1 entity of a case study
=
Cabling, Case Study Functions
edistk
edistk(e_ID1, e_ID2)
Distance between two entities, e_ID1 and e_ID2
=
Cabling, Case Study Functions
elen
elen(e_ID1)
Length of the e_ID1 entity of a case study
=
Graph Evaluation Function
evalgraph
evalgraph("graph_name", x)
Graph evaluation function enables you to use graph features to drive dimensions through relations. The dimensions can be section, part, or assembly dimensions.
graph_name—the name of a graph.
x—the value along the xaxis of the graph for which the y value is returned.
=
Strings as Arguements
exists
exists("x")
Test if a parameter, variable, or dimension exists or not
x is a string
EXISTS("ASM_MBR_NAME")
EXISTS("ASM_MBR_NAME_")
EXISTS("test03")
=
=
=
YES
NO
YES (note test03 is a defined variable in my relations)
Mathematical Functions
exp
exp(#)
e3
Returns e raised to the power of a number, where e = Euler's number = 2.718…
exp(3)=e3
=
20.085537
String Operators/Functions
extract
extract(#1,#2,#3)
Extracts pieces of strings.
#1=string analyzing
#2=starting position
#3=length (how many char to extract)
e.g.
looking at the entire string (4324870B)
Starting with the first character (4)
Extract 7 characters (4324870)
extract("4324870B",1,7)
Extract("4324870B",8,1)
=
=
4324870
B
Logical Functions
False*
false()
false
False function Returns "No"
(For some reason doesn't return "False"!)
False()
False
=
=
NO
FALSE
Mathematical Functions
floor
floor(#)
Round # down
Floor(3.25)
=
3.0000
Mathematical Functions
if
IF(c,x,y)
Similar to IF() function in Excel:
c= condition statement
x = what to do if true
y= what to do if false
(PTC documentation calls this a switching function but to me is too basic to earn this title)
IF(10==9,2,10)
=
10.0
Conditional Statements
if, Else, Endif
IF <condition>
<what to do if condition is met>
ELSE <what to do if condition is not met> (optional)
ENDIF
IfStarts the if statement
Elsesays what to do if statement is not bet (and is optional)
Endif(closes the if statement)
Can have IF without ELSE
Can't have IF with more than one ELSE (E.g. IF ELSE ELSE ENDIF
Can't have IF without ENDIF
Can have nested IF statements. Eg.
IF
ELSE
IF
ELSE
IF
ENDIF
ENDIF
ENDIF
asm_mbr_name = 4564870B
IF string_length(asm_mbr_name) > 7
Test01 = extract(asm_mbr_name,1,8)
ELSE
Test01 = extract(asm_mbr_name,1,7)
ENDIF
=
4564870B
String Operators/Functions
itos
itos(#)
Integer to String Reads in an integer and returns a string. If the input number is a # that is not an integer, itos rounds up, than converts to a string.
itos(6)
itos(6.7)
=
=
6
7
Mathematical Functions
ln
ln(#)
Returns the natural log (base e) of a #
ln(2)
=
0.693147181
Mathematical Functions
log
log(#)
Returns the base 10 logarithm of a #
log(2)
=
0.301029996
lookup_inst
lookup_inst ("generic_name", match_mode, "param_name_1", match_value_1, "param_name_2", match_value_2,...)
Used in ProPROGRAM
Used to automatically replace the given Family Table instance with another FT instance:
•generic name—Name of the generic model with a prt or asm extension
•match_mode—One of the following values:
–1 (find closest instance with param values less than or equal to supplied values)
0 (find instance with param values that match supplied values exactly)
1 (find closest instance with param values greater than or equal to supplied values)
•param_name_1—Family table parameter name
•match_value_1—Value to match against
INPUT
END INPUT
RELATIONS
INST_NAME = LOOKUP_INST ("PEG.PRT", 0, "D2", D6:0, "D1", D5:0 + 1)
END RELATIONS
ADD PART BLOCK
INTERNAL COMPONENT ID 1
END ADD
ADD PART (INST_NAME)
INTERNAL COMPONENT ID 2
PARENTS = 1 (#1)
END ADD
MASSPROP
END MASSPROP
Example: Replacing Family TableDriven Components
>
"In this way, the instance of peg.prt being assembled to blockpeg.asm is controlled, based on the dimensions of the hole in block.prt."
massprop_param
=
material_param
=
Mathematical Functions
max
max(#)
Compares 2 #s and returns the larger one
max(6.2,4)
=
6.2
Mathematical Functions
min
min(#)
Compares 2 #s and returns the smaller one
min(6.2,4)
=
4
Mathematical Functions
mod
mod(#n,#d)
Modulus function. Also known as Remainder function because gives just the remainder. e.g. n/d (numerator/denominator):
10/2=5 Remainder=0 (10/2+0/2)
10/3=3 Remainder=1 (9/3+1/3)
10/4=2 Remainder=2 (8/4+2/4)
In Programming Modulus can be useful to do many things. e.g.
Determine if Number is Odd/Even [if mod(n,2)=0 then n is even]
Clock arithmetic
[mod(9+5,12)=2pm]
Truncating decimal values
Wrapping values into a certain range
[given mod(n,360) to determine what quadrant a particular angle falls in for the unit circle) if Remainder 090, then Quad.1 if Remainder 90180, then Quad.2 if Remainder 180270, then Quad.3
If Remainder 270360, then Quad.4]
Mod(10,2)
Mod(10,3)
Mod(10,4)
Mod(9+5)
Mod(9+8,12)
Mod(400,360)
Mod(2300,360)
=
=
=
=
=
=
=
0
1
2
2 (e.g. 9am+5hrs =2pm)
5 (e.g. 9am+8hrs = 5pm)
40 (40º is in quadrant 1)
140 (140º is in quadrant 2)
mp_assigned_mass
=
mp_cg_x
=
mp_cg_y
=
mp_cg_z
=
mp_mass
=
mp_surf_area
=
mp_volume
=
Mathematical Functions
near
near(#y,#y,#delta)
determines if the numbers x and y are within delta of each other
near(5,8,3)
near(5,8,1)
=
=
1.0 (i.e. when true)
0.0 (i.e. when false)
Logical Functions
No*
no()
no
No Function Returns "No"
No()
No
=
=
NO
FALSE
Mathematical Functions
pi
pi()
Returns the number for PI
PI()
=
3.141592654
Mathematical Functions
pow
pow(#x,#y)
x^y
Raising x to the Power of y
#1=Base value
#2=Exponent
Pow(1,2)
Pow(2,2)
Pow(2,4)
=
=
=
1.0 (i.e. 1^2)
4.0 (i.e. 2^2)
16.0 (i.e. 2^4)
Strings as Arguements
rel_model_name
rel_model_name
or
rel_model_name()
Passing Strings as Arguments in Relations
rel_model_name
rel_model_name()
=
501234
(when done on 501234.drw table repeat region relations)
Strings as Arguements
rel_model_type
rel_model_type
or
rel_model_type()
Returns the current model type. If you are working in Assembly mode, rel_model_type() is equal to assembly.
(note you can use with or without parenthesis)
Passing Strings as Arguments in Relations
rel_model_type
rel_model_type()
=
DRAWING (when used in table repeat region relations)
String Operators/Functions
search
search(string, substring)
Searches for substrings. The resulting value is the position of the substring in the string (0 if not found). You can specify substrings with single or double quotes.
search(asm_mbr_name,"501234")
=
2
(Given asm_mbr_name is 05012340.prt)
Mathematical Functions
sign
sign(x,y)
Sign Transfer of y to x
If y<0, the result is –abs(x)
if y>=0, the result is abs(x).
sign(2,3)
sign(2,3)
sign(2,3)
sign(2,3)
=
=
=
=
2.0
2.0
2.0
2.0
Mathematical Functions
sin
sin(#º)
Returns the sine of a number
sin(2)
=
0.909297427
Mathematical Functions
sinh
sinh(#º)
Returns the hyperbolic sine of a number
sinh(2)
=
3.626860408
smt_def_ben_rad
=
smt_thickness
=
Mathematical Functions
sqrt
sqrt(#)
Take the square root of a number
sqrt(4)
=
2
String Operators/Functions
string_ends
string_ends (string1, string2)
Check to see if string1 ends with string2
Case Sensitive ("H" <NOT => "h")
string_ends("h456","56")
string_ends("h456H","56h")
string_ends("h456H","56H")
=
=
=
YES
NO
YES
Strings as Arguements
string_length
string_length(string)
string_length(<param>)
Returns the number of characters in a string or parameter.
string_length("als23fj")
string_length(asm_mbr_name)
=
=
7.0
6.0
(when done on 501234.prt table repeat region relations)
String Operators/Functions
string_match
string_match(string1, string2)
Check to see if 2 strings are exactly the same or not
Case insensitive ("H"="h")
string_match("456","456")
string_match("456","4560")
string_match("h456","H456")
=
=
=
YES
NO
YES
String Operators/Functions
string_starts
string_starts(string1, string2)
Check to see if string1 starts with string2
Case Sensitive ("H" <NOT => "h")
string_starts("h456","h4")
string_starts("h456","H4")
string_starts("h456","asd4")
=
=
=
YES
NO
NO
Mathematical Functions
tan
tan(#º)
Returns the tangent of a number
tan(2)
=
2.185039863
Mathematical Functions
tanh
tanh(#º)
Returns the hyperbolic tangent of a number
tanh(2)
=
0.96402758
trajpar
"Trajectory Parameter" Returns a system of numbers that varies from 0 to 1 across the length of a given path
http://en.wikipedia.org/wiki/Trajpar
sin(trajpar*8*pi())
=
creates an undulating wave
Composite Curve Trajectory Function
trajpar_of_pnt
trajpar_of_pnt("trajname", "pointname")
The trajectory parameter of a composite curve, trajpar_of_pnt, can be used in relations.
The following function returns a value between 0.0 and 1.0:
=
Logical Functions
True*
true()
true
True function Returns "YES"
(For some reason doesn't return "True"!)
True()
True
=
=
YES
TRUE
Logical Functions
Yes*
yes()
yes
Yes function Returns "Yes"
Yes()
Yes
=
=
YES
TRUE
*Relations containing conditional statements are not sorted. A condition is an expression that is either TRUE (or YES) or FALSE (or NO). These values can be used interchangeably in the conditional statement. For example, the following statements can all be evaluated the same way: From <https://support.ptc.com/help/creo/creo_pma/r9.0/usascii/fundamentals/fundamentals/Conditional_Statements_in_Relations.html>
Pro/ENGINEER, Creo Elements/Pro and Creo Parametric
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