Document retrieval apparatus and document retrieval method

1. A document retrieval apparatus comprising:

a document storage area that stores documents applied to a model;

a dictionary storage area that stores dictionaries, the dictionaries including at least one of a synonym dictionary or a similar word dictionary;

a model-document correspondence storage unit that stores a correspondence between a model and documents applied to the model;

a document-dictionary correspondence storage unit that stores a correspondence between the document and at least one dictionary applied to the document; and

a control unit, wherein

the control unit includes:

a model selecting unit that selects a model;

a search target document specifying unit that specifies documents applied to the model selected by the model selecting unit as search target documents by referring to the model-document correspondence storage unit;

a dictionary specifying unit that specifies at least one dictionary applied to the search target document specified by the search target document specifying unit by referring to the document-dictionary correspondence storage unit;

a query receiving unit that inputs a query;

a search keyword extraction unit that extracts a search keyword group by applying the dictionary specified by the dictionary specifying unit to the query input from the query receiving unit;

a retrieving unit that retrieves the search target document specified by the search target document specifying unit using the search keyword group extracted by the search keyword extraction unit; and

a retrieval result presenting unit that displays search results retrieved by the retrieving unit.

2. The document retrieval apparatus according to claim 1 , wherein the document retrieval apparatus is communicably connected to a plurality of machines.

3. The document retrieval apparatus according to claim 2 , wherein the document retrieval apparatus is communicably connected to the plurality of machines via a management device.

4. The document retrieval apparatus according to claim 2 , further comprising:

a machine-model correspondence storage unit that stores a correspondence between a machine communicably connected to the document retrieval apparatus and a model of the machine, wherein

the model selecting unit selects a model of a machine communicably connected to the document retrieval apparatus by referring to the machine-model correspondence storage unit.

5. The document retrieval apparatus according to claim 3 , wherein the management device includes a machine-model correspondence storage unit that stores a correspondence between a machine connected to the management device and a model of the machine, and

the model selecting unit selects a model of a machine connected to the management device by referring to the machine-model correspondence storage unit included in the management device.

6. The document retrieval apparatus according to claim 2 , further comprising:

a receiving unit that receives a query transmitted from the machine and model information of the machine, wherein

the model selecting unit selects the model on the basis of the model information of the machine received by the receiving unit, and

the query receiving unit inputs the query received by the receiving unit.

7. The document retrieval apparatus according to claim 3 , further comprising:

a receiving unit that receives a query transmitted from the management device and model information of the machine, wherein

the model selecting unit selects the model on the basis of the model information of the machine received by the receiving unit, and

the query receiving unit inputs the query received by the receiving unit.

8. A document retrieving method for causing a computer to execute processing, the computer including:

a document storage area that stores documents applied to a model;

a dictionary storage area that stores dictionaries, the dictionaries including at least one of a synonym dictionary or a similar word dictionary;

a model-document correspondence storage unit that stores a correspondence between a model and documents applied to the model; and

a document-dictionary correspondence storage unit that stores a correspondence between the document and at least one dictionary applied to the document, the processing comprising:

a model selecting step of selecting a model;

a search target document specifying step of specifying documents applied to the model selected in the model selecting step as search target documents by referring to the model-document correspondence storage unit;

a dictionary specifying step of specifying at least one dictionary applied to the search target document specified in the search target document specifying step by referring to the document-dictionary correspondence storage unit;

a query input step of inputting a query;

a search keyword extraction step of extracting a search keyword group by applying the dictionary specified in the dictionary specifying step to the query input in the query input step;

a retrieving step of retrieving the search target document specified in the search target document specifying step using the search keyword group extracted in the search keyword extraction step; and

a search result presentation step of presenting search results retrieved in the retrieving step.