One thing I like about Firefox is the abundance of extensions out there which can do almost anything that you can think of.
Piggy Bank is a Firefox extension that turns your browser into a mashup platform, by allowing you to extract data from different web sites and mix them together. Piggy Bank also allows you to store this extracted information locally for you to search later and to exchange at need the collected information with others.
Solvent in this case can help to generate semantic data in RDF format from the web pages to be used in Piggy Bank.
Imagine the following XQuery,
Without using any tool like Solvent, it is quite impossible to come out with the query manually. In short, Solvent greatly simplifies web page scraping using XQuery. Using it togther with WebHarvest, I am able to write my own custom scraper in Java easily.