Difference Between Top-down and Bottom-up Parsing Tabular Form
Top-down and Bottom-up Parsing Difference
- There are two parsing methods
- Top-down Parsing
- Bottom-up Parsing
- The Key Difference Between Top-down and Bottom-up Parsing is that Top-down parsing starts from the top level and moves downwards Whereas Bottom-up parsing starts from the bottom level and moves upwards.
Top-down and Bottom-up Parsing Comparison Chart
|Parse tree built from root to leaves.
|Parse tree built from leaves to root.
|Simple to implement
|Complex to implement
|Top-Down Parsing uses Left Most Derivation.
|Bottom-Up Parsing uses Right Most Derivation.
|It is less powerful compared to Bottom-up parsing.
|It is more powerful compared to Top-down parsing.
|Error detection is easy in Top-Down Parsing
|Error detection is difficult in Bottom-Up Parsing
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