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-rw-r--r--extra/wikipedia/README.md61
-rw-r--r--extra/wikipedia/stats_enwiki_20210801.txt104
-rw-r--r--extra/wikipedia/stats_enwiki_20211201.txt168
-rw-r--r--extra/wikipedia/stats_template.txt23
4 files changed, 356 insertions, 0 deletions
diff --git a/extra/wikipedia/README.md b/extra/wikipedia/README.md
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+
+This document describes how to parse references out of Wikipedia bulk XML
+dumps, using the `wikiciteparser` python package, for use in the refcat
+citation matching pipeline.
+
+Unfortunately, due to limitations in `wikiciteparser` (and the complexity of
+Wikipedia citation formatting across language instances), this pipeline only
+works with the English version of Wikipedia (enwiki).
+
+
+## Download Bulk XML Snapshot
+
+You can find documentation and links to recent snapshots at
+<https://dumps.wikimedia.org/backup-index.html>. We want the
+`-pages-articles.xml.bz2` files, which includes article text for the most
+recent version of articles. If we download the set of smaller individual files,
+instead of the single combined file, we can parallelize processing later.
+
+A hack-y way to download all the files is to copy/paste the list of URLs from
+the web listing, put them in a file called `urls.txt`, then run a command like:
+
+ cat urls.txt | parallel -j2 wget --quiet -c https://dumps.wikimedia.org/enwiki/20211201/{}
+
+
+## Install `wikiciteparser`
+
+To use the official/released version, in a virtualenv (or similar), run:
+
+ pip install wikiciteparser
+
+Or, do a git checkout of <https://github.com/dissemin/wikiciteparser>.
+
+
+## Run Parallel Command
+
+Within a virtualenv, use `parallel` to process like:
+
+ ls /fast/download/enwiki-20211201-pages-articles/enwiki*.bz2 \
+ | parallel -j12 --line-buffer python3 -m wikiciteparser.bulk {} \
+ | pv -l \
+ | gzip \
+ > enwiki-20211201-pages-articles.citations.json.gz
+
+This will output JSON lines, one line per article, with the article title,
+revision, site name, and any extracted references in a sub-array (of JSON
+objects). As of December 2021, it takes about 17 hours on a large machine, with
+the above command.
+
+## Prior Work
+
+Similar projects include:
+
+* [Harshdeep1996/cite-classifications-wiki](https://github.com/Harshdeep1996/cite-classifications-wiki):
+ uses `wikiciteparser` and PySpark to extract references from bulk XML,
+ outputs parquet. Requires a Spark cluster/environment to run. (itself used by
+ [Wikipedia Citations in Wikidata](https://github.com/opencitations/wcw))
+* [python-mwcites](https://github.com/mediawiki-utilities/python-mwcites): uses
+ `python-mwxml` to iterate over bulk XML, has relatively simple identifier
+ extraction
+* [gesiscss/wikipedia_references](https://github.com/gesiscss/wikipedia_references):
+ oriented towards tracking edits to individual references over time
diff --git a/extra/wikipedia/stats_enwiki_20210801.txt b/extra/wikipedia/stats_enwiki_20210801.txt
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+
+export CITEFILE=enwiki-20210801-pages-articles.citations.json.gz
+
+# total number of articles processed
+zcat $CITEFILE | wc -l
+=> 6,348,910
+
+# articles with one or more refs
+zcat $CITEFILE | rg '"CitationClass"' | wc -l
+=> 4,255,940
+
+# total number of refs
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | wc -l
+=> 36,057,931
+
+# refs by type
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | sort | uniq -c | sort -nr
+ 21257548 web
+ 6162933 news
+ 3984831 book
+ 2620278 journal
+ 756082 citation
+ 379975 harvnb
+ 105212 gazette
+ 99427 pressrelease
+ 84036 nhle
+ 78761 encyclopedia
+ 71774 gnis
+ 70308 nrisref
+ 67731 report
+ 48090 episode
+ 43060 geonet3
+ 41776 map
+ 40904 AV-media-notes
+ 40140 season
+ 28051 AV-media
+ 22182 thesis
+ 17891 conference
+ 10420 england
+ 7798 interview
+ 5100 sports-reference
+ 3332 podcast
+ 2557 arxiv
+ 1859 techreport
+ 1455 mailinglist
+ 1284 speech
+ 860 newsgroup
+ 837 sign
+ 657 serial
+ 567 DVD-notes
+ 215 policy
+
+# identifiers present
+zcat $CITEFILE | jq '.refs[] | select(.ID_list != null) | .ID_list | keys[]' -r | sort | uniq -c | sort -nr
+ 2825707 ISBN
+ 1859682 DOI
+ 980996 PMID
+ 520281 ISSN
+ 342543 PMC
+ 294828 BIBCODE
+ 261269 OCLC
+ 157287 JSTOR
+ 82960 ARXIV
+ 23376 MR
+ 20723 LCCN
+ 9518 ASIN
+ 7520 OL
+ 4845 ZBL
+ 4447 SSRN
+ 954 OSTI
+ 666 JFM
+ 425 USENETID
+ 151 ISMN
+ 95 RFC
+
+# refs with URL, by type
+zcat $CITEFILE | jq '.refs[] | select(.URL != null) | .CitationClass' -r | sort | uniq -c | sort -nr
+ 21169067 web
+ 5743802 news
+ 1958773 book
+ 1165475 journal
+ 476587 citation
+ 98280 pressrelease
+ 62235 report
+ 60868 encyclopedia
+ 27680 map
+ 18742 AV-media
+ 15317 thesis
+ 11236 conference
+ 10666 episode
+ 6609 interview
+ 5100 sports-reference
+ 3328 podcast
+ 2431 AV-media-notes
+ 1446 mailinglist
+ 1361 techreport
+ 1039 speech
+ 821 newsgroup
+ 504 sign
+ 138 serial
+ 24 harvnb
+ 21 DVD-notes
+ 15 gazette
+ 2 gnis
diff --git a/extra/wikipedia/stats_enwiki_20211201.txt b/extra/wikipedia/stats_enwiki_20211201.txt
new file mode 100644
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--- /dev/null
+++ b/extra/wikipedia/stats_enwiki_20211201.txt
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+
+export CITEFILE=enwiki-20211201-pages-articles.citations.json.gz
+
+# total number of articles processed
+zcat $CITEFILE | wc -l
+=> 6,416,542
+
+# articles with one or more refs
+zcat $CITEFILE | rg '"CitationClass"' | wc -l
+=> 4,389,394
+
+# total number of refs
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | wc -l
+=> 37,724,219
+
+# refs by type
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | sort | uniq -c | sort -nr
+ 22379651 web
+ 6430930 news
+ 4124318 book
+ 2699528 journal
+ 770319 citation
+ 388893 harvnb
+ 106646 gazette
+ 102752 pressrelease
+ 86908 nhle
+ 82366 encyclopedia
+ 72401 gnis
+ 71358 report
+ 70419 nrisref
+ 49233 episode
+ 43692 AV-media-notes
+ 43058 geonet3
+ 42300 map
+ 41957 season
+ 36349 AV-media
+ 24498 thesis
+ 18723 conference
+ 10591 england
+ 8283 interview
+ 5084 sports-reference
+ 3567 podcast
+ 2528 arxiv
+ 1915 techreport
+ 1466 mailinglist
+ 1325 speech
+ 869 newsgroup
+ 864 sign
+ 647 serial
+ 566 DVD-notes
+ 215 policy
+
+# identifiers present
+zcat $CITEFILE | jq '.refs[] | select(.ID_list != null) | .ID_list | keys[]' -r | sort | uniq -c | sort -nr
+ 2925108 ISBN
+ 1932505 DOI
+ 1010556 PMID
+ 557313 ISSN
+ 356460 PMC
+ 320414 BIBCODE
+ 275283 OCLC
+ 166861 JSTOR
+ 85286 ARXIV
+ 23600 MR
+ 21797 LCCN
+ 9927 ASIN
+ 7814 OL
+ 4878 ZBL
+ 4556 SSRN
+ 1071 OSTI
+ 672 JFM
+ 424 USENETID
+ 152 ISMN
+ 86 RFC
+
+# refs with URL, by type
+zcat $CITEFILE | jq '.refs[] | select(.URL != null) | .CitationClass' -r | sort | uniq -c | sort -nr
+ 22291836 web
+ 5995008 news
+ 2033769 book
+ 1217383 journal
+ 487205 citation
+ 101594 pressrelease
+ 65505 report
+ 63903 encyclopedia
+ 28179 map
+ 26538 AV-media
+ 17167 thesis
+ 11806 conference
+ 10924 episode
+ 7042 interview
+ 5084 sports-reference
+ 3562 podcast
+ 2484 AV-media-notes
+ 1458 mailinglist
+ 1416 techreport
+ 1072 speech
+ 831 newsgroup
+ 515 sign
+ 139 serial
+ 24 harvnb
+ 22 DVD-notes
+ 15 gazette
+
+# refs with ArchiveURL, by type
+zcat $CITEFILE | jq '.refs[] | select(.ArchiveURL != null) | .CitationClass' -r | sort | uniq -c | sort -nr
+ 4738008 web
+ 1089407 news
+ 111550 journal
+ 79472 book
+ 76758 citation
+ 33111 pressrelease
+ 12318 report
+ 8019 encyclopedia
+ 6061 AV-media
+ 5068 map
+ 4887 sports-reference
+ 2716 conference
+ 2138 interview
+ 1915 episode
+ 1716 thesis
+ 578 podcast
+ 400 AV-media-notes
+ 308 speech
+ 257 mailinglist
+ 244 techreport
+ 149 newsgroup
+ 32 sign
+ 10 serial
+ 7 DVD-notes
+ 4 nhle
+ 3 england
+ 2 gazette
+ 1 gnis
+
+# top ref URL hosts (not domains, but leading 'www' removed)
+zcat $CITEFILE | jq '.refs[] | select(.URL != null) | .URL' -r | cut -f3 -d/ | sed 's/^www\.//g' | sort | uniq -c | sort -nr | head -n30
+ 1266572 books.google.com
+ 552597 archive.org
+ 372440 nytimes.com
+ 361046 ncbi.nlm.nih.gov
+ 275580 bbc.co.uk
+ 261514 newspapers.com
+ 245562 theguardian.com
+ 214278 billboard.com
+ 197563 youtube.com
+ 190427 news.bbc.co.uk
+ 160735 census.gov
+ 143304 news.google.com
+ 125024 allmusic.com
+ 110937 nla.gov.au
+ 105348 washingtonpost.com
+ 93509 telegraph.co.uk
+ 85782 bbc.com
+ 82966 espncricinfo.com
+ 82789 timesofindia.indiatimes.com
+ 81518 variety.com
+ 77786 imdb.com
+ 76921 independent.co.uk
+ 73717 baseball-reference.com
+ 72244 deadline.com
+ 67088 animenewsnetwork.com
+ 64784 sports-reference.com
+ 63994 reuters.com
+ 63394 hollywoodreporter.com
+ 60720 thehindu.com
+ 58972 tvbythenumbers.zap2it.com
+ [...]
diff --git a/extra/wikipedia/stats_template.txt b/extra/wikipedia/stats_template.txt
new file mode 100644
index 0000000..07f9745
--- /dev/null
+++ b/extra/wikipedia/stats_template.txt
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+
+export CITEFILE=enwiki-YYYYMMDD-pages-articles.citations.json.gz
+
+# total number of articles processed
+zcat $CITEFILE | wc -l
+
+# articles with one or more refs
+zcat $CITEFILE | rg '"CitationClass"' | wc -l
+
+# total number of refs
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | wc -l
+
+# refs by type
+zcat $CITEFILE | jq '.refs[].CitationClass' -r | sort | uniq -c | sort -nr
+
+# identifiers present
+zcat $CITEFILE | jq '.refs[] | select(.ID_list != null) | .ID_list | keys[]' -r | sort | uniq -c | sort -nr
+
+# refs with URL, by type
+zcat $CITEFILE | jq '.refs[] | select(.URL != null) | .CitationClass' -r | sort | uniq -c | sort -nr
+
+# refs with ArchiveURL, by type
+zcat $CITEFILE | jq '.refs[] | select(.ArchiveURL != null) | .CitationClass' -r | sort | uniq -c | sort -nr
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-25 14:19:35 +0000