Internet is polluted with obsolete data

Internet is reaching her 50 year olds, to human this is an old age, i believe it is still true in cyber space. people are keep adding contents to internet but no one is evaluating the relevance of the contents. recently i was learning xml builder from internet, but most of the information are obsoleted, this is worse than no information are provided. end up it took me 1 whole just to figure out how it build a xml. some organisation really should look into this, who know, this could be profitable business in one day :)