Results Space Model
The Results Space Model above presents a schematic view of the Result Space, which consists of three dimensions: results, sessions, and users. A given cell in this cube consists of a set of Result Frames (RFs) for a result object (e.g., a web page, PDF file, video file) for a single session by a single user. Note that for queries that do not yield saved results, if the users wants nonetheless to save the query for future reuse, we will index a "no saved result" (null) entry that includes the query and other generative and contextual information. This will allow the user a more continuous history option within a single data model.
A RF consists of a specific result (e.g., a web page, PDF file, video file) with various attributes and subspaces associated with it. Each RF has attributes: rank, tags, and notes. Rank stores the rank of the result in the query that generated it. Tags are provided by the user and/or other collaborative users in the group and are similar to the tags used in social network and bookmark system. Notes offer users a way to annotate results with personally meaningful contextual information. Unlike tags, notes allow freeform text that can include descriptions of the relevance of the result to the person or project, information for collaborative group members, a plan for using the result, or other annotations. In addition to the attributes described above, each RF also contains the following subspaces: query, related, facets, world, and social. These subspaces can have attributes of their own. The query subspace contains attributes of the query that generated the result. These attributes are the query string, the source where the query was executed (e.g. Google, ACM Digital Library), and a listing of the top 100 results for the query (this number will be adjustable) from that source. The related subspace could contain items recommended by the source as being related to the result object such as explicit recommendations or outlinks.
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