Papers › Head-Driven Phrase Structure Grammar Parsing on Penn Treebank
Head-Driven Phrase Structure Grammar Parsing on Penn Treebank
Junru Zhou, Hai Zhao
Head-driven phrase structure grammar (HPSG) enjoys a uniform formalism representing rich contextual syntactic and even semantic meanings. This paper makes the first attempt to formulate a simplified HPSG by integrating constituent and dependency formal representations into head-driven phrase structure. Then two parsing algorithms are respectively proposed for two converted tree representations, division span and joint span. As HPSG encodes both constituent and dependency structure information, the proposed HPSG parsers may be regarded as a sort of joint decoder for both types of structures and thus are evaluated in terms of extracted or converted constituent and dependency parsing trees. Our parser achieves new state-of-the-art performance for both parsing tasks on Penn Treebank (PTB) and Chinese Penn Treebank, verifying the effectiveness of joint learning constituent and dependency structures. In details, we report 96.33 F1 of constituent parsing and 97.20\% UAS of dependency parsing on PTB.
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Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Constituency Parsing | CTB5 | Zhou etal. 2019 | F1 score | 89.40 | #8 of 9 | Archive leaderboard | report |
| Constituency Parsing | Penn Treebank | Head-Driven Phrase Structure Grammar Parsing (Joint) + XLNet | F1 score | 96.33 | #5 of 27 | Archive leaderboard | report |
| Constituency Parsing | Penn Treebank | Head-Driven Phrase Structure Grammar Parsing (Joint) + BERT | F1 score | 95.84 | #10 of 27 | Archive leaderboard | report |
| Dependency Parsing | Penn Treebank | HPSG Parser (Joint) + XLNet | LAS | 95.72 | #5 of 22 | Archive leaderboard | report |
| Dependency Parsing | Penn Treebank | HPSG Parser (Joint) + XLNet | POS | 97.3 | #5 of 22 | Archive leaderboard | report |
| Dependency Parsing | Penn Treebank | HPSG Parser (Joint) + XLNet | UAS | 97.20 | #5 of 22 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
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