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brain initiation

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2025-11-05 09:18:11 +01:00
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:PROPERTIES:
:ID: 984f8c3a-245c-459e-bd53-dd1e4ec90ea8
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#+title: index
An index is a way for a [[id:f2b1d5af-1a7d-47a5-95c8-4a85d558419e][server]] to register availiable machines on the internet. If a PC sends a search request for a website or an [[id:f055acfb-05dd-4228-a92a-356240b8c975][IP]] address to a [[id:80666401-173e-4828-9c29-552dab716946][dns]] Server, this server then saves the IP address and content of the asked website for faster next searches (caching). It also registers that there is a service availiable at the given address. Web indexing, or internet indexing, comprises methods for indexing the contents of a website or of the Internet as a whole. Individual websites or intranets may use a back-of-the-book index, while search engines usually use keywords and metadata to provide a more useful vocabulary for Internet or onsite searching. With the increase in the number of periodicals that have articles online, web indexing is also becoming important for periodical websites.
Back-of-the-book-style web indexes may be called "web site A-Z indexes". The implication with "A-Z" is that there is an alphabetical browse view or interface. This interface differs from that of a browse through layers of hierarchical categories (also known as a taxonomy) which are not necessarily alphabetical, but are also found on some web sites. Although an A-Z index could be used to index multiple sites, rather than the multiple pages of a single site, this is unusual.
Metadata web indexing involves assigning keywords, description or phrases to web pages or web sites within a metadata tag (or "meta-tag") field, so that the web page or web site can be retrieved with a list. This method is commonly used by search engine indexing.