wikilinkgraphs-redirects
------------------------

This dataset contains redirects in Wikipedia, i.e. alias names for Wikipedia articles, extracted by processing Wikimedia’s history dumps for the languages de, en, es, fr, it, nl, pl, ru, sv.

## Description

* `page_id`: an integer, the page identifier used by MediaWiki. This identifier is not necessarily progressive, there may be gaps in the enumeration;
* `page_title`: a string, the title of the Wikipedia article;
* `revision_id`: an integer, the identifier of a revision of the article, also called a permanent id, because it can be used to link to that specific revision of a Wikipedia article;
* `revision_parent_id`: an integer, the identifier of the parent revision. In general, each revision as a unique parent; going back in time before 2002, however, we can see that the oldest articles present non-linear edit histories. This is a consequence of the import process from the software previously used to power Wikipedia, MoinMonWiki, to MediaWiki;
* `revision_timestamp`: date and time of the edit that generated the revision under consideration;
* `revision_minor`: a boolean flag, with value 1 if the edit that generated the current revision was marked as minor by the user, 0 otherwise;
* `redirect.target`: a string, the page to which the redict points;
* `redirect.tosection`: a string, the anchor text of the wikilink;

### Sample

Extract of the file `enwiki.redirects.20180301.csv.gz` in enwiki/20180301/:

```
page_id,page_title,revision_id,revision_parent_id,revision_timestamp,revision_minor,redirect.target,redirect.tosection
10,AccessibleComputing,862220,233192,2002-02-25T15:43:11Z,1,Accessible Computing,
10,AccessibleComputing,15898945,862220,2003-04-25T22:18:38Z,1,Accessible_computing,
10,AccessibleComputing,56681914,15898945,2006-06-03T16:55:41Z,1,Computer accessibility,
10,AccessibleComputing,74466685,56681914,2006-09-08T04:16:04Z,0,Computer accessibility,
10,AccessibleComputing,133180268,74466685,2007-05-24T14:41:58Z,1,#NOREDIRECT,
10,AccessibleComputing,133452289,133180268,2007-05-25T17:12:12Z,1,Computer accessibility,
10,AccessibleComputing,381200179,133452289,2010-08-26T22:23:51Z,0,#NOREDIRECT,
10,AccessibleComputing,381202555,381200179,2010-08-26T22:38:36Z,1,Computer accessibility,
10,AccessibleComputing,631144794,381202555,2014-10-26T04:50:23Z,0,Computer accessibility,
10,AccessibleComputing,767284433,631144794,2017-02-25T00:30:28Z,0,Computer accessibility,
```


## FAQs

### What is the total size of the dataset, the number of files and the largest file in the dataset?

The dataset contains 9 files. For each of the 9 languages you will find a gzipped files. The total dataset size is 681M, divided among the languages like this:

* 62M  dewiki/
* 353M enwiki/
* 37M  eswiki/
* 47M  frwiki/
* 27M  itwiki/
* 21M  nlwiki/
* 17M  plwiki/
* 68M  ruwiki/
* 53M  svwiki/

The average file size is 79.3GB and the largest file is ~353MGB (enwiki’s redirects).

### How are files organized?

Files are divided in directories, one for each language, like this:

```
.
├── dewiki
│   └── 20180301
│       └── dewiki.redirects.20180301.csv.gz
├── enwiki
│   └── 20180301
│       └── enwiki.redirects.20180301.csv.gz
├── eswiki
│   └── 20180301
│       └── eswiki.redirects.20180301.csv.gz
├── frwiki
│   └── 20180301
│       └── frwiki.redirects.20180301.csv.gz
├── itwiki
│   └── 20180301
│       └── itwiki.redirects.20180301.csv.gz
├── nlwiki
│   └── 20180301
│       └── nlwiki.redirects.20180301.csv.gz
├── plwiki
│   └── 20180301
│       └── plwiki.redirects.20180301.csv.gz
├── ruwiki
│   └── 20180301
│       └── ruwiki.redirects.20180301.csv.gz
└── svwiki
    └── 20180301
        └── svwiki.redirects.20180301.csv.gz
```

### Who produced this dataset and why?

* This dataset has been produced by Cristian Consonni, David Laniado and Alberto Montresor.
* Cristian Consonni and Alberto Montresor are affiliated with the Department of Information Engineering and Computer Science (DISI), University of Trento, Trento, Italy; David is affiliated with Eurecat - Centre Tecnològic de Catalunya, Barcelona, Spain.
* This dataset has also been produced as part of the research related to the ENGINEROOM project. EU ENGINEROOM has received funding from the European Union's Horizon 2020 research and innovation programme under the Grant Agreement no 780643.

## License

This dataset is released under [Creative Commons Attribution 4.0 International](http://creativecommons.org/licenses/by/4.0/legalcode).

The original dump is released under the [GNU Free Documentation License (GFDL)](https://www.wikipedia.org/wiki/Wikipedia:Copyrights) and the [Creative Commons Attribution-Share-Alike 3.0 License](https://creativecommons.org/licenses/by-sa/3.0/), see [the legal info](https://dumps.wikimedia.org/legal.html).