Information retrieval system, registration apparatus for indexes for information retrieval, information retrieval method and program
OwnerMasaki KANinventor
Life of this patent
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Abstract
An information retrieval system comprising: an information acquisition unit that acquires information as a subject of retrieval; a time information specifying unit that specifies time information owned by said information as the subject of retrieval; and an index updating unit that updates said index using the time information specified by said time information specifying unit; wherein said information retrieval system provides an information retrieving function of reproducing retrieved results at any time point by providing index for information retrieval with the time information and by using data of said index relevant to a reference point of retrieval identified at the time of retrieval.
Claims4
A method of updating an index, the method comprising:
- determining a first time range of an index;
- determining a time interval at which data has been backed up to a back up storage device;
- one of merging the index into a first index and splitting the index into a first plurality of indexes based on a comparison between the first time range and the determined time interval;
- and
- registering data stored into the back up storage device in the first index or the first plurality of indexes.
Dependencies are inferred from the claim text.