Foreword.......................................................................................................................6
Chapter 1: Introduction of the topic background..........................................................8
1.1 Relevance of the subject...................................................................................10
1.2 Major terms......................................................................................................11
1.3 Focus, goals and structure of the report...........................................................11
Chapter 2: Concept of data quality.............................................................................13
2.1 Data quality definition......................................................................................14
2.2 The importance of data quality.........................................................................15
Chapter 3: Search engines dependency.......................................................................16
3.1 Search engine market configuration.................................................................17
3.1.1 Search engine categories..........................................................................17
3.1.2 Search engine market...............................................................................19
3.1.3 The search engines in the world...............................................................19
3.1.4 The search engine market shares per country...........................................22
3.1.5 The search engines competition...............................................................23
3.1.6 The semantic web.....................................................................................24
3.2 Search engines dependency aspect...................................................................25
3.2.1 Search engines dependency proves..........................................................25
3.2.2 Search engines dependency aspect...........................................................27
3.3 Search engines dependency problems..............................................................28
3.3.1 Privacy issues...........................................................................................29
3.3.2 Looking for other search engines.............................................................30
3.3.3 Search engine awareness..........................................................................30
3.3.4 Other search engines existence awareness...............................................32
3.3.5 Less confident regarding other search engines.........................................33
3.3.5 Less confident regarding other search engines.........................................33
3.3.6 Even the best cannot provide you everything...........................................34
Chapter 4: Risks of search engines dependency and its influence on data quality.....35
4.1 The information has been found but is poor....................................................36
4.2 What the search engines do not tell you...........................................................36
4.3 The best way to get data quality.......................................................................37
4.3.1 The sub-search engines.............................................................................37
4.3.2 The size of the Internet.............................................................................38
4.3.3 Single search engine Internet coverage....................................................39
4.3.4 Multiple search engine Internet coverage.................................................42
4.3.5 Others search engine Internet coverage....................................................44
4.3.6 A concrete representation of the World Wide Web...................................46
4.4 The gap between search engine dependency and data quality.........................47
Chapter 5: The Google example.................................................................................50
5.1 Google..............................................................................................................51
5.2 Google's success...............................................................................................51
5.3 Google dependency state..................................................................................52
5.4 Google functions..............................................................................................52
5.5 Google added functionalities............................................................................53
5.6 Google success is his weakness.......................................................................53
5.7 Google's disappearance hypothesis..................................................................54
Conclusion..................................................................................................................55
Declaration..................................................................................................................56
List of literature...........................................................................................................57
Afterword....................................................................................................................61
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