rename column names in a jmp file as per values in rows in a separate .csv file

[#1]

Hello, 

I am newbie to JSL, so appreciate help.
I have three files.

file #1: It is the Reference file, [as ref.csv] holding 3 cols as below. 

Category, width, label
--------------------------------
A,0,L1.abc
A,1,L2.xt
A,2,L8.dr
A,3,L20.ws
A,4,L72.oz
B,0,L11.qq
....
B,6,L61.er

file #2: data file#1 in JMP, holding Category, Data and many other cols.
file #3: data file #2 in JMP, holding Category, Data and many other cols.
difference between the two data files [File #2 and file #3] is the category type and width of value in data col.

Data file #1:

Category|data|many cols.....
----------------------------------------
A 123.23 ....
A 321.45 .... 
.....
many rows

the width of values in the column "data" [excluding the dots] is matching to the # of rows in file #1 for a given category
example:
width of 123.23 in row 1 in data file#1 is 5.
the # of rows in reference file for category A would be 5. this need not be tested per say. this is how the tables are coming in [ie when pulled from the source]

In the future, in the reference file , say for category A , the # of rows increase to 6 or more, the width of the value held in the data column in file data file #1 would also increase when information is pulled from database.

Data file #2:

Category|data|many cols.....

----------------------------------------
B 1236.23 ....
B 3213.45 .... 
.....
many rows

Goal 1:create new cols dependent on the width of value held in the "data" col in the datafile #1 [and other data files]
I am done with goal # 1 !

ex:
updated data file#1 would look like this:
Category|data|c1|c2|c3|c4|c5|many cols.....
----------------------------------------
A 123.23 1 2 3 2 3 ....
A 321.45 3 2 1 4 5 .... 
.....

goal 2: rename the new cols in data file #1 [ie c1 to c5] to L1... to L72... as defined in the column "label" in the reference file. no change in the cells values, just update the selected col names.

expected output after goal 2 is done:
Update the data file #1 to look like this:
Category|data|L1.abc|L2.xt|L8.dr|L20.ws|L72.oz|many cols.....
----------------------------------------
A 123.23 1 2 3 2 3 ....
A 321.45 3 2 1 4 5 .... 
.....

I need help with goal #2.

For goal #2 I opened the reference file but not sure to move forward.

Thanks
David

[#2]

OK.....this is a bit picky.....but what is in the dataTablesList are not a list of data table names but data table() functions, which point to data tables.
{"Table1","Table2"} // A list of data table names
{ data table( "Table1" ), data table( "Table2" ) } // a list of pointers to data tables