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--- |
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language: san |
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license: apache-2.0 |
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tags: |
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- dependency-parsing |
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- nested-compound-type-identification |
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- lstm |
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- nlp |
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- sanskrit |
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- pytorch |
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--- |
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# DepNeCTI-LSTM: Dependency-based Nested Compound Type Identification for Sanskrit |
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This repository contains the datasets proposed in the paper [Sandhan et al., 2023](https://arxiv.org/abs/2310.09501) |
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--- |
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# Summary |
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The **NeCTIS** dataset is created for **nested compound type identification in Sanskrit**, focusing on multi-component compounds (especially with more than 2 components). It includes **coarse** and **fine-grained** semantic type annotations. |
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### Key Features |
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- **Two datasets**: |
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- **NeCTIS**: In-domain (Prose) |
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- **NeCTIS-OOD**: Out-of-domain (Poetry) |
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- **Annotations**: |
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- **Coarse-level**: 4 broad compound types: |
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- **Avyayībhava** (Indeclinable) |
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- **Bahuvrīhi** (Exocentric) |
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- **Tatpurusha** (Endocentric) |
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- **Dvandva** (Copulative) |
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- **Fine-grained**: 86 detailed sub-types |
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### Dataset Statistics |
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| Dataset | #Nested Compounds | Train | Test | Dev | Compound Types | |
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|----------------|-------------------|--------|-------|-------|----------------| |
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| **NeCTIS** | 17,656 | 12,431 | 3,493 | 2,405 | 4 (86) | |
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| **NeCTIS-OOD** | 1,189 | — | 1,189 | — | 4 (86) | |
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### Domain & Genre |
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- **NeCTIS**: Philosophical, Literary, and Ayurvedic domains → *Prose* |
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- **NeCTIS-OOD**: Paurāṇic (epic literature) domain → *Poetry* |
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- Poetry tends to include more novel, complex, and metrical compounds. |
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### Annotation Process |
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- Funded by **DeitY (2009–2012)** as part of the **Sanskrit-Hindi Machine Translation project** |
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- Annotation done by **6 institutes**, each with ~10 members across 3 expertise levels: |
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- **Junior Linguist** (Master’s in Sanskrit) |
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- **Senior Linguist** (Ph.D. in Sanskrit) |
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- **Professional Linguist** (Professors) |
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- Multi-level quality checks and **cross-institute validation** |
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- Annotation guidelines based on **Pāṇinian grammar** and traditional commentaries. |
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**For Detailed information refer to the original paper.** |
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# Files |
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``` |
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├── README.md |
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├── LICENSE |
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├── No Context CSV files/ |
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│ ├── Combined.csv |
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│ ├── test.csv |
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│ ├── train.csv |
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│ ├── dev.csv |
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│ └── outofDomain.csv |
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├── With Context CSV files/ |
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│ ├── Combined.csv |
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│ ├── test.csv |
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│ ├── train.csv |
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│ ├── dev.csv |
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│ └── outofDomain.csv |
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``` |
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# Dive in the Dataset |
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## With Context |
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- Total rows: **15,940 rows**. |
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- Split: Train (69%), Test (18%), Dev (13%). |
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- **train CSV**: **11,000 rows**. |
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- **test CSV**: **2,940 rows**. |
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- **dev CSV**: **2,000 rows**. |
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- The **combined CSV**: all above files merged, 15,940 rows total. |
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- These four CSV files include the following columns: |
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`Unnamed: 0`, `Raw_Tagged`, `Clean`, `Bio_tagged`, `Span_Tagged`, `Coarse_tag`, `Compound_lengths`, `Coarse_Span_Tagged`. |
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- The **out of Domain** contains **1139 rows** |
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- The **out-of-domain** dataset has an additional column, `Book`, and lacks the `Compound_lengths` column. |
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| Column Name | Description | |
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|--------------------|-----------------------------------------------------------------------------------------------------------| |
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| **Unnamed: 0.1** | Auto-generated row index by pandas when reading CSV, used as a unique identifier for each row. | |
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| **Unnamed: 0** | Another index column created during CSV operations, often redundant with `Unnamed: 0.1`. | |
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| **Raw_Tagged** | Original input text with embedded annotation tags marking nested compound components and their types. Tags use angled brackets `< >` and suffix codes to show component boundaries and types. | |
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| **Clean** | Cleaned, tokenized version of the text without any annotation tags or special characters, for plain reading. | |
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| **Bio_tagged** | BIO tagging scheme at the token level indicating compound boundaries: `B-C` = Beginning of a compound segment, `I-C` = Inside a compound segment, `O` = Outside any compound (non-compound token) | |
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| **Span_Tagged** | Token spans marking compound segments along with their labels. Format: `start,end Label`. Multiple spans are separated by `\|`. For example, `0,2 BvS\|2,5 Ds` means tokens from index 0 to 2 form a `BvS` compound, tokens 2 to 5 form a `Ds` compound. | |
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| **Coarse_tag** | Coarse-grained compound type annotations embedded with original tagged segments, indicating linguistic compound types such as `Bahuvrihi`, `Tatpurusha`, or `Dvandva`. | |
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| **Compound_lengths** | List indicating the length (number of tokens) of each compound segment in the text. For example, `[1, 1]` means there are two compounds each one token long. | |
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| **Coarse_Span_Tagged** | Combines span indices with coarse compound type labels to specify the token ranges and their compound categories. For example: `0,2 Bahuvrihi|2,5 Dvandva`. | |
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|**Book**| Present in ood dataset. Informs about the book from which the sentence is taken.| |
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## Without Context |
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- Total rows: **15,940 rows**. |
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- Split: Train (69%), Test (18%), Dev (13%). |
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- **train CSV**: **11,000 rows**. |
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- **test CSV**: **2,940 rows**. |
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- **dev CSV**: **2,000 rows**. |
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- The **combined CSV**: all above files merged, 15,940 rows total. |
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- The **out of Domain** contains **1139 rows** |
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- These five CSV files include the following columns: |
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`Unnamed: 0`, `Raw_Tagged`, `Clean`, `Bio_tagged`, `Span_Tagged`, `Coarse_tag`, `Coarse_Span_Tagged`. |
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| Column Name | Description | |
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|--------------------|-----------------------------------------------------------------------------------------------------------| |
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| **Unnamed: 0.1** | Auto-generated index column, unique identifier for each row. | |
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| **Unnamed: 0** | Another index column created during CSV processing, often redundant with `Unnamed: 0.1`. | |
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| **Raw_Tagged** | Original text with embedded annotation tags marking nested compound components. Tags use angled brackets `< >` with suffix codes for component boundaries and types. Example: `<sa-sarzapaM>BvS <tumburu-DAnya-vanyaM>Ds` | |
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| **Clean** | Cleaned and tokenized text with no annotation tags, representing plain text tokens. | |
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| **Bio_tagged** | BIO scheme token-level tagging indicating compound boundaries: `B-C` = Beginning of a compound segment `I-C` = Inside a compound segment `O` = Outside any compound segment. | |
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| **Span_Tagged** | Token span annotations marking compound segments with labels. Format: `start,end Label`. Multiple spans are separated by `\|`. For example, `0,2 BvS\|2,5 Ds` indicates tokens 0 to 2 form a `BvS` compound, and tokens 2 to 5 form a `Ds` compound. | |
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| **Coarse_tag** | Coarse-grained compound type annotations embedded in the original tagged text, indicating linguistic compound types such as `Bahuvrihi`, `Tatpurusha`, or `Dvandva`. | |
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| **Coarse_Span_Tagged** | Combines token span indices with coarse compound type labels, e.g., `0,2 Bahuvrihi\|2,5 Dvandva` specifies token ranges and their corresponding compound categories. | |
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# Citation |
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```bibtex |
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@misc{sandhan2023depnecti, |
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title={DepNeCTI: Dependency-based Nested Compound Type Identification for Sanskrit}, |
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author={Jivnesh Sandhan and Yaswanth Narsupalli and Sreevatsa Muppirala and Sriram Krishnan and Pavankumar Satuluri and Amba Kulkarni and Pawan Goyal}, |
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year={2023}, |
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eprint={2310.09501}, |
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archivePrefix={arXiv}, |
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primaryClass={cs.CL} |
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} |
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``` |
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Original paper [DepNeCTI: Dependency-based Nested Compound Type Identification for Sanskrit](http://arxiv.org/abs/2310.09501) |
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Github Repository of [DepNeCTI](https://github.com/yaswanth-iitkgp/DepNeCTI) |
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