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What is the difference ../directory path and ./directory path in ksh?

For instance, my file contains the following content...

set -A array
set -A test
${array[0]}=1
${array[1]}=2
${array[2]}=3
${test[0]}="Boy"
${test[1]}="Girl"...

while [[$a -ne 25]];do
first[$b]=${hat[$a]}
echo "${first[$b]}"
b=$((b+1))
a=$((a+5))
done


I'm trying to append values from the indicated index of one array...

Test1.txt

Tom is hot

Test.sh

filename="/directory/Test1.txt"
set - A store
while IFS= read value
do
awk '{split($value,store," ")}'
...

Let say I have a file with variables (Test1.txt)
In Test1.txt file, it consists of

Tom is a boy
Jim is a dog


In the other scripting file (RunTest1.sh), I have

#!/bin/ksh
filename =...

I have a question to this command

find . -type f -name ".*txt" -exec grep "text" {}\.

The find command will locate a file name with the extension of txt once per round and find the word "text"...

Like the script file...where sometimes it encounters error when executing and so the errors are reported to a log file.... My question is how do I add the directory of the log file to a script file?

I'm curious to know how do I add an empty log file (test1.log) to an existing text file to monitor all the changes made to a.txt.
Is this expression

export PATH=$PATH:/home/test1.log

right to...