Can I add custom fields to the input XML file?

Hi guys. Is the XML format for inputting data, is a standard one? or can I change it. That is instead of : adddoc field name=id3007WFP/field field name=nameDell Widescreen UltraSharp 3007WFP/field field name=manuDell, Inc./field /doc/add can I enter something like, custListclients field

Can Solr be used to search public websites(Newbie).

Hi all. I am quite new to solr. I am just checking whether this tool suits my application. I am developing a search application that searches all publically available websites and also some selective websites. Can I use solr for this purpose. If yes how can I get started. All the tutorials are