Description

An Extractor is a processing object called by an Index with the value of an evaluated XPath expression or with a string. Example normalizers might extract keywords from an element or the entire contents thereof as a single string. Extractors must also be used on the query terms to apply the same keyword processing rules, for example.

Implementations

• extractor.SimpleExtractor
  Extracts the exact text from the data given to it
• extractor.KeywordExtractor
  Extracts keywords and their frequency from the data
• extractor.DateExtractor
  Extracts dates from from the data given
• extractor.ProximityExtractor
  Extracts the keywords, their frequency and location from the data
• extractor.ExactProximityExtractor
  Extracts the exact text and location from the data for use with parent element level proximity

API

Function	Parameters	Returns	Description
__init__	config, parent
process_string	session, string	hash	Process a raw string, eg from an attribute value
process_node	session, domNode	hash	Process a DOM node
process_eventList	session, list of SAX events	hash	Process a list of SAX events