Document processing method and system

A method for filtering a candidate document in a candidate document set, wherein the candidate document set comprises at least one candidate document, the method comprising:

• receiving one or more entity word-topic word pairs;
• identifying one or more entity words of the candidate document, wherein the entity words are words indicating focused entities of the candidate document;
• identifying, based on each identified entity word, one or more topic words related to the based entity words in the candidate document where the entity word is located;
• determining whether to add the candidate document into a filtered document set using the entity words and topic words in the given entity word-topic word pairs and the identified entity words and topic words in the candidate document;
• and
• adding the candidate document into a filtered document set in response to determining that the candidate document should be added into said filtered document set, wherein:
• each of the given entity word-topic word pairs comprise an entity word and a topic word;
• all entity words in the entity word-topic word pair form an entity word set;
• and
• all topic words in the entity word-topic word pair where each entity word is form a topic word set corresponding to the entity word.

A system for expanding a seed document in a seed document set, wherein the seed document set comprises at least one seed document, the system comprising:

• entity word identifying means for identifying one or more entity words of the seed document, the entity words being words indicating focused entities of the seed document;
• topic word identifying means for identifying, based on each identified entity word, one or more topic words related to the based entity word in the seed document where the entity word is located;
• pairing means for forming an entity word-topic word pair from each identified topic word and the entity word based on which the each topic word is identified;
• and
• document expanding means for obtaining one or more expanded documents through the web by taking the entity word and topic word in the each entity word-topic word pair as key words at the same time, the expanded documents comprising not only the entity word in each entity word-topic word pair but also the topic word in the each entity word-topic word pair.

A system for filtering a candidate document in a candidate document set, wherein the candidate document set comprises at least one candidate document, the system comprising:

• receiving means for receiving one or more entity word-topic word pairs;
• entity word identifying means for identifying one or more entity words of the candidate document, the entity words being words indicating focused entities of the document;
• topic word identifying means for identifying, based on the identified each entity word, one or more topic words related to the based entity word in the candidate document where the entity word is located;
• and
• determining means for determining whether to add the candidate document into a filtered document set using the entity words and topic words in the given entity word-topic word pairs and the identified entity words and topic words in the candidate document and for adding the candidate document into a filtered document set in response to a determining result yes, wherein:
• each of the given entity word-topic word pairs comprise an entity word and a topic word;
• all entities in the entity word-topic word pair form an entity word set;
• and
• all topic words in the entity word-topic word pair where each entity word is located forming a topic word set corresponding to the entity word.