I use a TCP client written by another UIC math professor and sed for most of my scraping needs. Can you or anyone give me an example, _that is likely to be see

I use a TCP client written by another UIC math professor and sed for most of my scraping needs. Can you or anyone give me an example, _that is likely to be seen on any website_, that you believe cannot be solved with sed but can be solved with XPath? The example at the URL you given above appears to have a target CSV file as its only requirement. I routinely use HTTP pipelining and sed/tr to produce CSV files from websites. As for R, I'm more curious about its database and analytics capabilities. How does it stack up to kdb+?