Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
The Wayback Machine - https://web.archive.org/web/20141231010949/http://www.athensvoice.gr/site/culture/books/%CE%B2%CE%B9%CE%B2%CE%BB%CE%B9%CE%BF%CE%BA%CF%81%CE%B9%CF%84%CE%B9%CE%BA%CE%B7