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The effect of these collections is to filter the results that would have come from the overall Cornell search, allowing only the subset of results that correspond to your list of domains to be reported. The advantage is that with the normal seach dialog you can only specifiy a single domain to filter on - with a collection it can be many domains. Adding a domain to your collection that is outside of the Cornell master list will not cause it to be indexed! You may be wondering what domains are in Cornell's master list.
The Cornell University Web Knowledgebase has some good information about the Google Search Appliance here...
Cornell University Library Websites Google Search Appliance Collection
In September 2006 I asked Lisa Cameron-Norfleet at The Office of Web Communications to set up a Google Search Appliance Collection that I could use for searching Cornell University Library websites. She kindly (and quickly) created the collection and told me how to get in to the administrator interface. I added all the Cornell Universiy Library digital collections , the list of individual libraries, the Registry of Digital Collections, and a few other library websites. Here are the domains and paths currently in the collection.
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