Once the information has been extracted from a given source, it passed to the Notification Engine, which is in charge of:

1. scan all the gathered items in order to identify and properly mark the new ones - plus, possibly, the deleted and changed ones;
2. invoke a list of so called “providers” on a xml representation of such data; then, each provider is in charge of:
3. 1. optionally apply a user defined xslt transformation to the data
   2. do “something” with the resulting document, possibly using some user supplied parameters

Now you need to learn about:

• the (extremely simple) Curiosity xml data representation
• how to define and use a provider in the configuration file
• the providers shipped with the default Curiosity bundle
• (optionally) how to implement your own provider

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