
The following is an excerpt from the recent Top 5 Semantic Search Engines post on the Pandia Search Engine News site:
‘Semantic” is a word with a magic ring to it in search engine circles. The way it’s hyped makes you suspect it is the second coming of search…
What is semantic search?
A semantics searc engine attempts to make sense of search results based on context. It automatically identifies the concepts structuring the texts. For instance, if you search for ‘election’ a semantic search engine might retrieve documents containing the words “vote”, ‘campaigning’ and ‘ballot’, even if the word ‘election’ is not found in the source document.
An important part of this process is disambiguation, both of the queries and of the content on the web. What this means is that the search engine — through natural language processing — will know whether you are looking for a car or a big cat when you search for ‘jaguar’.
The five search engines below all use semantic analysis to sift through and present data. But, as you will see, they do not do this in the same way and present five different products.
When to use semantic search engines
Semantic search has the power to enhance traditional web search, but it will not replace it. A large portion of queries are navigational and semantic search is not a replacement for these. Research queries, on the other hand, will benefit from semantic search…
Hakia is a general purpose semantic search engine, as opposed to e.g. Powerset and Cognition (below), that search structured corpora (text) like Wikipedia…
SenseBot is a web search engine that summarizes search results into one concise digest on the topic of your query. The search engine attempts to understand what the result pages are about. For this purpose it uses text mining to analyze Web pages and identify their key semantic concepts…
Powerseet is at present not a regular web search engine. It works best on smaller, relatively structured corpora…
DeepDyve DeepDyve is a powerful, professional research tool available for free for the general public…
Cognition has a search business based on a semantic map, built over the past 24 years, which the company claims is the most comprehensive and complete map of the English language available today. It is used in support of business analytics, machine translation, document search, context search, and much more…”
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