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Meta-search systems: examples, working principle

The Internet, a couple of decades ago, just emerging in the most developed countries, is currently developing at a rapid pace, with nothing comparable. Every day the amount of information in it grows exponentially, representing dynamically variable data. Naturally, such a mass of information needs somehow to be controlled. It was for this purpose that search engines were introduced at one time. But at the moment to cope with all the amount of information that every minute comes to the Web, not a single search engine. Especially if you take into account the difference of search algorithms. After all, by asking the query in different search engines, even equivalent to each other by databases, the user can get completely different results. Therefore, it was necessary to improve existing systems. Using the aggregation of results, the most developed PCs implemented additional resources in their software - meta-search systems.

What is Meta Search?

In the Internet, a meta-search engine is a machine that can process a user's query and the results of the most common search engines. In other words, the interface of the program is no different from that of a conventional search engine. But when she is given a specific request, she does not use her resources, but redirects the request to the leading search engines, and as a result, the user sees a combined list of results from the databases of different search engines. Moreover, for the convenience of using this type of search, all duplicate links are completely eliminated, which contributes to the improved results of data output.

Benefits

The most important advantage that meta-search systems can boast is the ability, in a short time, without too much effort, to obtain the results of various search engines without duplicating links. Using just one program to structure information, you can get a wider range of results from different sources, without having to use a lot of leading listings.

Many users often face such a problem that some rare information, documents or programs can be seen in one search engine and completely absent in the other. Thus, a person begins to use those where he, in fact, found rare information. And again, faced with a similar problem. Already another query the selected search engine does not find, but it is displayed in the old one, which did not justify the expectations. It is this shortcoming that makes it possible to eliminate metasearch systems in real life, giving users the most balanced results.

disadvantages

All the disadvantages of metasearch follow from its advantages, being their logical continuation. There is no own index database in meta-search as such, therefore it is impossible to add URLs of own sites to it. The second, rather important minus is a rather meager list of syntactic possibilities, that is, it is quite difficult to form an expanded information search.

Basically, up to twenty different data retrieval systems are used, and, naturally, their advanced search options are different. Of course, at the moment there are already meta-search systems developed on the principle of a new school. They take into account all the differences between the MS itself, and, accordingly, the expanded search has more possibilities. But so far such systems are few, so the question remains unresolved.

Varieties

Before further considering the functionality of these systems, it is worth noting that there are differences in this type of search. The classic type, discussed above and based on the fact that the MS handles the indexes of other search engines, and then passes the information to the user, is considered the most common and popular. But given the improvements and changes in such resources, there are also other varieties of metasearch systems.

One of the most common at the moment is the case in which information about the results of the request is immersed in frames, and all the information is within the same meta page. It is worth noting that each frame in this case contains the original page of the search engine, which was chosen by the target. In some cases, a couple of pages open, depending on the number of PSs selected by the user.

Also the variant "All in one search" is popular. That is, the user has a search form open, with which he can access an infinite number of different search systems. But when making a request, he can only apply to one chosen one. In other words, one search is one search engine. This is not as convenient as, for example, in the classical version.

The most common search engines are meta

Among the systems of this kind, the most popular classical platform was the Vivisimo metasearch system. She recruited up to twelve million unique visitors in one month. But it is worth noting that popularity does not mean automatic confirmation of the quality and comfort of using the resource.

Old school

At the moment there are many classic meta-finders. All of them have a long history of creation, promotion and existence. Practically each of such systems has the same principle of action, therefore to consider them separately does not make sense.

Therefore, let's imagine classical meta-search systems, the list of which looks like this:

  • Http://www.dogpile.com,
  • Http://www.metacrawler.com,
  • Http://www.search.com,
  • Http://www.vivissimo.com.

Also worth paying attention to IxQuick, MetaEureka, ZapMeta, WebCrawler and WindSeek.

The main difference is the interface. Therefore, choosing the best among them is quite difficult, because each user finds a resource depending on their own preferences. Only after trying personally to work with each of these systems, you can understand which one meets all the needs and meets expectations.

New school

At the moment, there are meta-search systems of a completely different type, from the so-called "new school". The main difference between them is the use of clustering. Technically, its implementation takes place in different forms. Usually it looks like an automatic selection of keywords and phrases with information added in the cloud, indirectly related to the user's request. The screen displays additional keys, by which you can refine the search, make it more narrowly focused. In other words, meta-search bibliographic systems offer options that make the query more specific, narrowing the scope of information retrieval and helping the user to find the data he needs.

In addition, the systems of the new generation allow more elaborate study of the results obtained. In other words, they use the so-called search strategy, that is, if necessary, the user can set its parameters independently.

From the new generation to meta-search systems are: Clusty, Kartoo, Mooter, Izito, WebClust and iBoogie.

All that search donors give out is subject to ranking and is analyzed by meta-search. This happens immediately, as soon as the system receives the results, the entire process is automatic. The resource ranks all descriptions of the found data. Further, a repeated analysis is carried out, the main criterion of which is the place in all components of the search, and all similar data found by the searcher in a specific and other PS are taken into account.

Search pages

In addition to full-fledged search engines, there are also meta-pages, they are often called "all in one." In their properties, they are very similar to the PS, but they are not. Earlier we have already considered many meta-search systems, examples of pages created on their similarity: iTools, AllSearches, AdClick.ru and Searchalot. Despite their inferiority as a PC, many users still prefer to use these resources for searching. In fact, this is not surprising, since these pages have very similar functionality and implement the same features that are available, for example, in iBoogie.

conclusions

At the moment, there are several hundred resources, which are meta-search systems. The Internet is developing at an active pace every year. As for individual choice, it often depends on subjective factors, for example, a successful range of colors or the presence of the comfort of using the interface. It is worth noting that some meta-finders were initially unsuccessfully created, their functionality is not able to improve the search, and in some cases even aggravate the process itself. In this connection, it is best for the user to select a suitable resource for himself.

Naturally, Western search engines are much ahead of domestic search engines, and many use them as a search tool. But not to mention the quality and usability of Rambler and Yandex is impossible. These meta-searchers perfectly manage their work and help to find optimal results even for complex and rare queries. Also I want to pay attention to Nigma.rf. She was the very first to appear on the open spaces of the Runet as an intellectual system for metasearch. Also at the moment, the system for searching social networks called yoname.com is gaining popularity.

In any case, the search for information using meta-search systems is much more efficient than the classical use of various MS. After all, they display much more results and cover a large database of information on the network. And given how quickly the amount of content on the Internet grows, these systems will be very helpful even for normal work on the Web.

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