update readme

README.md

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 ---
 license: apache-2.0
+task_categories:
+- text-generation
+language:
+- en
+tags:
+- data-juicer
+- pretraining
 ---
+
+# The Pile -- EuroParl (refined by Data-Juicer)
+
+A refined version of EuroParl dataset in The Pile by [Data-Juicer](https://github.com/alibaba/data-juicer). Removing some "bad" samples from the original dataset to make it higher-quality.
+
+This dataset is usually used to pretrain a Large Language Model.
+
+**Notice**: Here is a small subset for previewing. The whole dataset is available [here](https://dail-wlcb.oss-cn-wulanchabu.aliyuncs.com/LLM_data/our_refined_datasets/pretraining/the-pile-europarl-refine-result.jsonl) (About 2.2GB).
+
+## Dataset Information
+
+- Number of samples: 61,601 (Keep ~88.23% from the original dataset)
+
+## Refining Recipe
+```yaml
+# global parameters
+# global parameters
+project_name: 'Data-Juicer-recipes-EuroParl'
+dataset_path: '/path/to/your/dataset'  # path to your dataset directory or file
+export_path: '/path/to/your/dataset.jsonl'
+
+np: 50  # number of subprocess to process your dataset
+open_tracer: true
+
+# process schedule
+# a list of several process operators with their arguments
+process:
+  - clean_email_mapper:
+  - clean_links_mapper:
+  - fix_unicode_mapper:
+  - punctuation_normalization_mapper:
+  - whitespace_normalization_mapper:
+
+  - alphanumeric_filter:
+      tokenization: false
+      min_ratio: 0.75  # <3sigma (0.779)
+      max_ratio: 0.90 # >3sigma(0.878)
+  - average_line_length_filter:  # for code
+      max_len: 588  # 3sigma
+  - character_repetition_filter:
+      rep_len: 10
+      max_ratio: 0.16  # >3sigma (0.114)
+  - flagged_words_filter:
+      lang: en
+      tokenization: true
+      max_ratio: 0.0007  # 3sigma
+  - language_id_score_filter:
+      min_score: 0.7
+  - maximum_line_length_filter:  # for code
+      max_len: 4000  # >3sigma (3104)
+  - perplexity_filter:
+      lang: en
+      max_ppl:  7596 #(3sigma)
+  - special_characters_filter:
+      max_ratio: 0.3  # > 3sigma (0.243)
+  - text_length_filter:
+      max_len: 2e5
+  - words_num_filter:
+      tokenization: true
+      min_num: 20
+      max_num: 1e5  # 3sigma
+  - word_repetition_filter:
+      lang: en
+      tokenization: true
+      rep_len: 10
+      max_ratio: 0.2  # > 3sigma (0.185)
+
+  - document_simhash_deduplicator:
+      tokenization: space
+      window_size: 6
+      lowercase: true
+      ignore_pattern: '\p{P}'
+      num_blocks: 6
+      hamming_distance: 4
+```