Which is not one of the common challenges of wrapper construction? (A) Learning the source schema \( T_{S} \) is difficult. (B) Learning the extraction program \( E_{W} \) is difficult. (C) Learning the grammar \( G_{S} \) is difficult.   D There are many exceptions in how data are laid out and formatted.

Programming Logic & Design Comprehensive
9th Edition
ISBN:9781337669405
Author:FARRELL
Publisher:FARRELL
Chapter2: Elements Of High-quality Programs
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Which is not one of the common challenges of wrapper construction?

(A) Learning the source schema \( T_{S} \) is difficult.

(B) Learning the extraction program \( E_{W} \) is difficult.

(C) Learning the grammar \( G_{S} \) is difficult.

 

D There are many exceptions in how data are laid out and formatted.

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