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 # NamuWikiText
 
-TBD
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+NamuWikiText is a dataset released by lovit@github. It provides Namu Wikipedia in a text format.
+Data specification is as follows.
+
+- author: lovit@github
+- repository: [https://github.com/lovit/namuwikitext](https://github.com/lovit/namuwikitext)
+- size:
+  - train: 31,235,096 lines (500,104 docs, 4.6G)
+  - dev: 153,605 lines (2,525 docs, 23M)
+  - test: 160,233 lines (2,527 docs, 24M)
+
+Data structure is as follows:
+
+|Attributes|Property|
+|---|---|
+|text|a body of a section|
+|pair|a title of a section|
+
+
+## 1. Using in Python
+
+You can download and load the corpus after executing your Python console.
+
+### Downloading the corpus
+
+You can download NamuWikiText corpus into your local directory with the following Python codes.
+
+```python
+from Korpora import Korpora
+Korpora.fetch("namuwikitext")
+```
+
+```note
+By default, the corpus is downloaded to a Korpora directory within the user's root directory (`~/Korpora`). If you wish to download the corpus to another directory,
+add `root_dir=custom_path` argument to the fetch method.
+```
+
+```tip
+When the fetch method is executed with `force_download=True` argument, it ignores the existing corpus in the local directory and re-downloads the corpus. The default value of `force_download` is `False`.
+```
+
+
+### Loading the corpus
+
+You can load NamuWikiText corpus from your Python console with the following codes.
+If the corpus does not exist in the local directory, it is also downloaded as well.
+
+```python
+from Korpora import Korpora
+corpus = Korpora.load("namuwikitext")
+```
+
+You can also load the corpus as follows.
+The output of these codes is identical to that of previous codes.
+
+```python
+from Korpora import NamuwikiTextKorpus
+corpus = NamuwikiTextKorpus()
+```
+
+If you use either one of these previous examples, you can load the corpus into the variable `corpus`.
+`train` refers to the training dataset of the corpus, and you can check its first training instance as follows.
+
+```
+>>> corpus.train[0]
+SentencePair(text='상위 문서: 아스날 FC\n2009-10 시즌 2011-12 시즌\n2010 -11 시즌...', pair=' = 아스날 FC/2010-11 시즌 =')
+>>> corpus.train[0].text
+상위 문서: 아스날 FC\n2009-10 시즌 2011-12 시즌\n2010 -11 시즌...
+>>> corpus.train[0].pair
+= 아스날 FC/2010-11 시즌 =
+```
+
+`dev` and `test` refer to the validation and test datasets of the corpus, respectively. Each of their first instance can be accessed as follows.
+
+```
+>>> corpus.dev[0]
+SentencePair(text='상위 항목: 축구 관련 인물, 외국인 선수/역대 프로축구\n...', pair=' = 소말리아(축구선수) =')
+>>> corpus.test[0]
+SentencePair(text='', pair=' = 덴덴타운 =')
+```
+
+By executing the `get_all_texts` method, you can access all texts (bodies of sections) within the corpus.
+
+```
+>>> corpus.get_all_texts()
+['상위 문서: 아스날 FC\n2009-10 시즌 2011-12 시즌\n2010 -11 시즌...', ... ]
+```
+
+By executing the `get_all_pairs` method, you can access all pairs (titles of sections) within the corpus.
+
+```
+>>> corpus.get_all_pairs()
+['= 아스날 FC/2010-11 시즌 =', ... ]
+```
+
+
+## 2. Using in a terminal
+
+You can directly download the corpus without executing Python console.
+To do so, use the following command.
+
+```bash
+korpora fetch --corpus namuwikitext
+```
+
+```note
+By default, the corpus is downloaded to a Korpora directory within the user's root directory (`~/Korpora`). If you wish to download the corpus to another directory,
+add `--root_dir custom_path` argument to the fetch command.
+```
+
+```tip
+If you add `--force_download` argument when executing the fetch command in the terminal, it ignores the existing corpus in the local directory and re-downloads the corpus.
+```
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