I was looking FileBasedProvider.java 's code and it extends LiteralBasedProvider

If i want to implement my own MetaDataProvider, i must do the same? Extends .NET's LiteralBasedProvider? Or i just need to extends MetadataProviderAdapter class?

Can i have more then one "Stream Source" (i don't know the real name... ) in tha same page? For exemple, quotes of a stocklist is one "Stream Source". Can i have another "Stream Source", News, for exemple?