- What is archer?
- Where are the docs about "this" api?
- What, in specific, are you finding "confusing"?
- Where's the example of what you have tried (and how did it fail)?
Your last five OPs have show the same utter lack of detail, effort and code -- they're essentially all "gimme"s (Oops. my mistake: in 1 case, the post is an inappropriate root node clarifying a "gimme).
posting xml data
Only printing multiline entries once
Removing Duplicates from a multiline entry
General Question on parsing a variable
And, NOT just BTW, most of those are FAQS, examples in Tutorials, or readily answered once the basics in perldoc perlintro are studied and understood.
If you didn't program your executable by toggling in binary, it wasn't really programming!