I am trying to implement some data filters on my text data. The filters are defined something like this: 
(AND
      (OR
            AUTHOR=John PROFIT=90%
            AUTHOR=Matt PROFIT=80%
      )
      PUBLISHER=OReilly
)

[download]
I need to somehow convert the above filter into something sensible so that I can apply to the following data: 
Page 1

AUTHOR: John
PROFIT: 20%
PUBLISHER: TMH
BOOK: OPERATING SYSTEMS

Page 2

AUTHOR: John
PROFIT: 90%
PUBLISHER: OREILLY
BOOK: ALGORITHMS

Page 3

AUTHOR: Matt
PROFIT: 80%
PUBLISHER: TMH
BOOK: COMPUTER NETWORKS

Page 4

AUTHOR: Matt
PROFIT: 80%
PUBLISHER: OREILLY
BOOK: COMMUNICATION SYSTEMS

[download]
Then when I apply the filter to this data, I should get: the results from Page 2 and Page 4. I thought of pushing the elements into an array as they are encountered while scanning the filter but it didn't make any sense because I'm not sure how to use this. Am I missing out some easy thing here?

In reply to Implementing a text filter on some dataset by legend

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