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The following page has been changed by OlgaN:
http://wiki.apache.org/pig/PigDataTypeApis

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  === Data Map ===
  
  A data map is a map of string keys mapped to arbitrary datums. They can be 
looked up by a string key. 
- (see EvalFunctions). The API for a Data Map  is:
+ (see EvalFunction). The API for a Data Map  is:
  
  {{{
        //returns the cardinality of the data map

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