Internet search tools مقاله

خلاصه ماشینی:

The most common information retrieval tools on this platform are subject directories, search engines, and meta-search engines, each of which has utilized specific techniques for selecting, organizing, and retrieving information resources requested by users. Due to the high cost and time required for indexing web pages by specialized human resources, subject directories usually lack comprehensive coverage of information resources and internet documents; for this reason, they generally cover fewer documents compared to search engines. Therefore, if keywords that represent the actual content of the web page are selected and these keywords are converted into meta tags, an important step will be taken towards increasing the accuracy of indexing internet documents. If web site providers do not intervene in the indexing of their internet documents using meta tags, search engines themselves determine and select the keywords of each document by using specialized software. This software is a computer program that, by carefully examining millions of web pages registered in the search engine collection, selects the appropriate results for each search and ranks them based on the degree of relevance to the question posed. In other words, contrary to most people's belief, search engines do not search for information from all existing sites on the internet, but rather they only retrieve relevant resources and documents from among the information already registered in their own database. Names and internet addresses of some important search engines include: httP://www. Names and internet addresses of some important meta-search engines include: chubba:httP://www.