I need to figure out what the page content is about. Something like what google adsense does .
For example, If i have a web page about dogs , I need to figure out that page is about ( third party si开发者_运维知识库tes ) dogs so i can suggest dog walking services .
Can i consult an google database or something similar .
This is one of the holy grails of the Semantic Web. There is not one answer. You could scrape the HTML (for example using Python - Beautiful Soup) and submit the text to OpenCalais for analysis.
This is not a task that you want to take on in your spare time - use others's work. Oz
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