Common Techniques
Two common techniques are #1 using a web crawler or #2 user submissions.
- By using a web crawler the service will not depend on an active community for their content, thereby building a larger database faster, which usually results in the community growing larger as well. However, web site developers and system administrators do have the ability to block these robots from accessing web pages (using a robots.txt).
- While it can be difficult to start such services due to potentially low rates of user submission, this system can yield some of the best results. By crawling web pages one is only able to obtain the information the public has bothered to post to the Internet. They may have not bothered to post it due to not thinking anyone would be interested in it, lack of a proper medium, etc. However, if they see someone wants their information then they may be more apt to submit it.
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