This includes VPN (virtual private networks) and any website where pages require a username and password. Passworded access, subscriptions, or non-subscriptions. Applicable content includes travel industry data (flight info, hotel availability), job listings, product databases, patents, publicly-accessible government information, dictionary definitions, laws, stock market data, phone books, and professional directories. This typically includes databases that generate pages on demand. In this case, page content only gets displayed when a human applies a set of actions, mostly entering data into a form (specific query information, such as job criteria for a job search engine). ![]() Form-controlled entry that's not password-protected Known as the "Shallow Web," a number of workarounds have been developed to help you access this content. Keep in mind that some pages are only temporarily invisible, possibly slated to be indexed at a later date.Įngines have traditionally ignored any Web pages whose URLs have a long string of parameters and equal signs and question marks, on the off chance that they'll duplicate what's in their database – or worse – the spider will somehow go around in circles. There are several reasons why a page may be invisible. ![]() An "invisible" page isn't necessarily inaccessible it's simply not indexed by a search engine. ![]() When an ordinary search engine query comes back with no results, that doesn't necessarily mean there is nothing to be found.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |