What is [the default for] AppleScript's text item delimiters?

What is the default for AppleScript’s text item delimiters?

should have looked around first found my answer here: http://macscripter.net/articles/402_0_10_0_C/

It really doesn’t matter. Your application should never care what the default is.

Save the current setting, set the delimiter to what the task requires, then restore the previous current setting. Do this whenever you write a block of code that requires using the text item delimiter.