“…Currently, the best‐known search engine of this kind is Google. A crawler‐based, or automatic, search engine is made up of three major parts: the crawler, the indexer, and the query engine (for further details, see, for example, Arasu, Cho, Garcia‐Molina, Paepcke, & Raghavan, 2001; Brin & Page, 1998; or Rasmussen, 2003).…”