diff --git a/README.md b/README.md index 43a6359947f0c0afe10ed86528003c97a613976a..8e7357efbd77245d63cf0f6940b846b4da3956c7 100644 --- a/README.md +++ b/README.md @@ -34,14 +34,24 @@ size_categories: The PES2O dataset is a collection of ~40M creative commmon licensed academic papers, cleaned, filtered, and formatted for pre-training of language models. It is derived from -the [Semantic Scholar Open Research Corpus][2]([Lo et al, 2020][1]), or S2ORC. +the [Semantic Scholar Open Research Corpus][2]([Lo et al, 2020][1]), or S2ORC. We release multiple version of PES2O, each with different processing and knowledge cutoff date. We recommend you to use the latest version available. ## Document Format -TODO +Each document in the dataset is a dictionary with the following fields: + +- `added`: Date the document was added to the corpus. +- `created`: Best-guess date for when the document was first published. Some have resolution down to the day, only down to the year. +- `id`: Semantic Scholar Corpus ID of the document; it can be used with the [Semantic Scholar API](https://api.semanticscholar.org/) to retrieve metadata about the document (e.g., fields of study, authors). +- `source`: Collection from which the document was sourced from. At the moment, two are supported: + - `s2orc`: collection of full-text papers + - `s2ag`: collection of title and abstracts +- `text`: Text of the document. Paragraphs are separated by two newlines (`\n\n`). +- `version`: version of PES2O. + ## PES2O V1 @@ -49,11 +59,49 @@ TODO - *Knowledge cutoff*: 2023-01-03 - *Number of documents*: 67.56M -- *Number of whitespace-separated tokens**: 47,3M +- *Number of whitespace-separated tokens*: 47.37M ### Processing -TODO +Processing differs slightly wether it was derived from the full-text corpus (`s2orc`) or the title and abstract corpus (`s2ag`). + +#### S2ORC-derived documents + +Unfiltered, S2ORC contains 11.3M papers and 46.9B whitespace-separated tokens as of 2023-01-03. To derive PES2O v1, we impose the following constraints: + +- The paper must have a title and abstract. +- From each paper, we use [Grobid](https://github.com/kermitt2/grobid) to extract section headers and paragraphs; figures, tables, and references, and any other non-textual content is removed. Title and abstracts are also available, but they come from the Semantic Scholar metadata (obtained through the APIs), not Grobid. +- The paper must be in English. + - To determine the language of each document, we use the [pycld3](https://github.com/bsolomon1124/pycld3) library + - We run pycld3 on the first 2000 characters of each paragraph in the paper. + - The language of the paper is the most common language of the paragraphs. +- The paper must have at least 500 whitespace-separated words. +- The paper was published after 1969; papers published before this date are often obtained through OCR and contain unrecoverable errors. +- The paper must have at least 5 paragraphs. + - All sections that have a average log word probability of less than `-20` are removed. + - To calculate the average log word probability, we use word frequencies extracted from the [1T Web Ngram corpus](https://catalog.ldc.upenn.edu/LDC2006T13); specifically, we use the list available [created by Rachel Tatman](https://www.kaggle.com/datasets/rtatman/english-word-frequency). A copy is hosted [here](https://ai2-s2-research-public.s3-us-west-2.amazonaws.com/lucas/google-1T-unigram/unigram_freq.csv). +- The most frequent word in the paper consists of alpha characters only, and it appears in less than 7.5% of the document. + - Words are obtained by splitting the text on whitespace. + +The train set contains papers published before 2022-12-01; +the validation set includes documents published after 2022-12-01 and until 2023-01-03. + +#### S2AG-derived documents + +The S2AG corpus contains titles and abstracts of papers in Semantic Scholar. +Unfiltered, the corpus contains 91.1M papers and 15.5B whitespace-separated tokens as of 2023-01-03. To derive PES2O v1, we impose the following constraints: + +- Abstract must be in English. + - To calculate the language, we once again use pycld3 +- Title must be in English, or have average unigram log probability greater than -20. +- Abstract must be in English. +- Abstract must have higher than -20 average unigram log probability. +- Abstract must have at least 50 words. +- Abstract must have no more than 1000 words. +- The most frequent word in the union of text and abstract must be a 2+ character alpha word, or it can be `a` followed by a 2+ character alpha word. +- Paper was published after 1969. + +#### Statistics | Dataset | Split | # Documents | # Words | |:-------:|:-------:|:-----------:|:--------------:| @@ -85,4 +133,3 @@ TODO [1]: https://aclanthology.org/2020.acl-main.447/ [2]: https://github.com/allenai/s2orc - diff --git a/pes2o.py b/pes2o.py new file mode 100644 index 0000000000000000000000000000000000000000..48a4b55c8d93e2fcb944a3dae3438177be3cb828 --- /dev/null +++ b/pes2o.py @@ -0,0 +1,99 @@ +import gzip +import json +import datasets + + +logger = datasets.logging.get_logger(__name__) + + +_URL = "https://huggingface.co/datasets/allenai/pes2o" + +_VARIANTS = ["v1", "v2"] + +_N_SHARDS_PER_SPLIT = { + "v1": {"train": {'s2orc': 10, 's2ag': 10}, "valid": {'s2orc': 1, 's2ag': 1}}, + "v2": {"train": {'s2orc': 10, 's2ag': 10}, "valid": {'s2orc': 1, 's2ag': 1}}, +} + +_DATA_URL = "\ +https://huggingface.co/datasets/allenai/pes2o/resolve/main/\ +{name}/{subset}/{split}/{shard:05d}.json.gz\ +" + +_DESCRIPTION = "\ +The PES2O dataset is a collection of ~40M creative commmon licensed academic \ +papers, cleaned, filtered, and formatted for pre-training of language models. \ +It is derived from the Semantic Scholar Open Research Corpus(Lo et al, 2020), \ +or S2ORC.\ +" + +_CITATION = "" + + +class pes2o(datasets.GeneratorBasedBuilder): + """Pretraining Efficiently on S2ORC!""" + + BUILDER_CONFIGS = [datasets.BuilderConfig(name) for name in _VARIANTS] + + def _info(self): + return datasets.DatasetInfo( + description=_DESCRIPTION, + features=datasets.Features( + { + "added": datasets.Value("string"), + "created": datasets.Value("string"), + "id": datasets.Value("string"), + "source": datasets.Value("string"), + "text": datasets.Value("string"), + "version": datasets.Value("string") + } + ), + supervised_keys=None, + homepage=_URL, + citation=_CITATION, + ) + + def _split_generators(self, dl_manager): + data_urls = {} + for split in ["train", "validation"]: + n_shards = _N_SHARDS_PER_SPLIT[self.config.name][split] + data_urls[split] = [ + _DATA_URL.format( + name=self.config.name, + split=split, + subset=subset, + index=index + ) + for subset, n_shards in n_shards.items() + for index in range(n_shards) + ] + train_downloaded_files = dl_manager.download( + data_urls["train"] + ) + validation_downloaded_files = dl_manager.download( + data_urls["validation"] + ) + return [ + datasets.SplitGenerator( + name=str(datasets.Split.TRAIN), gen_kwargs={ + "filepaths": train_downloaded_files + }), + datasets.SplitGenerator( + name=str(datasets.Split.VALIDATION), gen_kwargs={ + "filepaths": validation_downloaded_files + } + ), + ] + + def _generate_examples(self, filepaths): + """This function returns the examples in the raw (text) form by + iterating on all the files.""" + id_ = 0 + for filepath in filepaths: + logger.info("generating examples from = %s", filepath) + with gzip.open(open(filepath, "rb"), "rt", encoding="utf-8") as f: + for line in f: + if line: + example = json.loads(line) + yield id_, example + id_ += 1 diff --git a/v1/s2ag.train.0.gz b/v1/train/s2ag/00000.json.gz similarity index 100% rename from v1/s2ag.train.0.gz rename to v1/train/s2ag/00000.json.gz diff --git a/v1/s2ag.train.1.gz b/v1/train/s2ag/00001.json.gz similarity index 100% rename from v1/s2ag.train.1.gz rename to v1/train/s2ag/00001.json.gz diff --git a/v1/s2ag.train.2.gz b/v1/train/s2ag/00002.json.gz similarity index 100% rename from v1/s2ag.train.2.gz 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0000000000000000000000000000000000000000..635bd550a92f80e10479b1ab499660c25b9dcfa0 --- /dev/null +++ b/v2/valid/s2orc/00000.json.gz @@ -0,0 +1,3 @@ +version https://git-lfs.github.com/spec/v1 +oid sha256:32d5696a1df222ca512f3705b4bb4c732ae1814d3aca66f94f538e28663ba2c7 +size 494441994