Editing Category:Theatre (section)

=== Mining ===

There are essentially two types of SemWeb applications, mining and intentional semantic development. One technique in mining is "scraping" to parse presumably reliable HTML pages. Many citizen projects use this technique to extract public data from recalcitrant government sources, for example, [http://www.theyworkforyou.com They Work for You]. Mash ups are related, sites like [http://www.housingmaps.com Housing Maps] combine data from disparate sources into one useful interface. However, scraping can be easily foiled by obfuscating low level structure, intentionally or not.

Another mining approach involves scraping human oriented text. [http://www.opencalais.com Open Calais] is a infrastructure example of this. [http://healthbase.netbase.com Health Base] is an end user application. These sites use patterns in human text to try to derive statements. This technique is easily foiled leading to incorrect observations.