Scripting question

[HakePT]

(string &in asParent, string &in asChild, int alState)

These are the parameters of a function. A function receives parameters and does something with them.

Void functionadd(int a, int b, int x) /// int describes the type of data in this case integer or a normal number, "a", "x" and "b" are the names of the numbers)
{
x=a+b; //adds "a" and "b" and places that value in "x"
}

If for example you called: "functionadd(5,4,x);"
x would become 9.

So basically your function receives 3 parameters:
string &in asParent //a text that identifies the parent ("player" for example) | string==text
string &in asChild //a text that identifies the child ("key1" for example)
int alState //a number that identifies the state (state "1","2", etc) | int==number
As to what the function does depends on the description. Probably something to change the parent or the child when they interact/collide.