Domain-specific sentiment classification
US8356030B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 17, 2011 |
| Grant date | Jan 15, 2013 |
| Priority date | — |
| Expiry date | Jun 17, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/313
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A domain-specific sentiment classifier that can be used to score the polarity and magnitude of sentiment expressed by domain-specific documents is created. A domain-independent sentiment lexicon is established and a classifier uses the lexicon to score sentiment of domain-specific documents. Sets of high-sentiment documents having positive and negative polarities are identified. The n-grams within the high-sentiment documents are filtered to remove extremely common n-grams. The filtered n-grams are saved as a domain-specific sentiment lexicon and are used as features in a model. The model is trained using a set of training documents which may be manually or automatically labeled as to their overall sentiment to produce sentiment scores for the n-grams in the domain-specific sentiment lexicon. This lexicon is used by the domain-specific sentiment classifier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.