A General Information Extraction Framework Based on Formal Languages
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arXiv
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| Format: | Preprint |
| Publié: |
2025
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| _version_ | 1866908891782053888 |
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| author | Schmid, Markus L. |
| author_facet | Schmid, Markus L. |
| contents | For a terminal alphabet $Σ$ and an attribute alphabet $Γ$, a $(Σ, Γ)$-extractor is a function that maps every string over $Σ$ to a table with a column per attribute and with sets of positions of $w$ as cell entries. This rather general information extraction framework extends the well-known document spanner framework, which has intensively been investigated in the database theory community over the last decade. Moreover, our framework is based on formal language theory in a particularly clean and simple way. In addition to this conceptual contribution, we investigate closure properties, different representation formalisms and the complexity of natural decision problems for extractors. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2505_15605 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | A General Information Extraction Framework Based on Formal Languages Schmid, Markus L. Formal Languages and Automata Theory For a terminal alphabet $Σ$ and an attribute alphabet $Γ$, a $(Σ, Γ)$-extractor is a function that maps every string over $Σ$ to a table with a column per attribute and with sets of positions of $w$ as cell entries. This rather general information extraction framework extends the well-known document spanner framework, which has intensively been investigated in the database theory community over the last decade. Moreover, our framework is based on formal language theory in a particularly clean and simple way. In addition to this conceptual contribution, we investigate closure properties, different representation formalisms and the complexity of natural decision problems for extractors. |
| title | A General Information Extraction Framework Based on Formal Languages |
| topic | Formal Languages and Automata Theory |
| url | https://arxiv.org/abs/2505.15605 |