Information extraction dates back to the late 1970s in the early days of NLP. An early commercial system from the mid-1980s was JASPER built for Reuters by the Carnegie Group Inc … 展开

Applying information extraction to text is linked to the problem of text simplification in order to create a structured view of the information present in free … 展开

The following standard approaches are now widely accepted:
• Hand-written regular expressions (or nested group of regular expressions)
• Using … 展开

• Data extraction
• Keyword extraction
• Knowledge extraction
• Ontology extraction
• Open information extraction 展开

The present significance of IE pertains to the growing amount of information available in unstructured form. Tim Berners-Lee, inventor of the World Wide Web, refers to the existing Internet as the web of documents and advocates that more of the content be … 展开

IE has been the focus of the MUC conferences. The proliferation of the Web, however, intensified the need for developing IE systems … 展开

• General Architecture for Text Engineering (GATE) is bundled with a free Information Extraction system
• Apache OpenNLP is a Java machine learning toolkit for natural language processing
• OpenCalais is … 展开