Parsing is an automated collection and systematization of information from open sources using scripts. Another name for this process is web scraping. Scripts that collect and systematize information are called parsers. They work like this: search for sources using specified parameters - for example, you can give the parser a list of sites, and it will find pages with prices on them; extract the necessary information from sources - a few lines of text, a link or an amount; transform information - for example, a parser can take a fragment from  an HTML document ...   read more