Provided by: wdq_0.4.4-3_all 
NAME
wdq - command line access to Wikidata Query Service
SYNOPSIS
Access Wikidata Query Service <https://query.wikidata.org/> via command line to perform SPARQL queries
("query" mode), lookup entities ("lookup"), or search items and properties ("search" or "psearch"):
wdq -g en solar system # search 'solar system' in English
wdq psearch -g es parte # search property 'parte' in Spanish
wdq P361 Q544 # lookup properties and items
wdq '?c wdt:P361 wd:Q544' # query parts of the solar system
See the manual for details or get help via "wdq help":
wdq help options # list and explain command line options
wdq help modes # list and explain request modes
wdq help output # explain output control
wdq help formats # list and explain output formats
wdq help ontology # show Wikidata ontology in a nutshell
wdq help prefixes # list RDF prefixes allowed in queries
wdq help version # show version of wdq
DESCRIPTION
The command line script "wdq", included in CPAN module App::wdq, provides a tool to access Wikidata Query
Service <https://query.wikidata.org/>. It supports formulation and execution of SPARQL SELECT queries
<http://www.w3.org/TR/sparql11-query/#select> to extract selected information from Wikidata or other
Wikibase instances.
INSTALLATION
Perl should already installed at most operating systems. Otherwise get Perl!
<https://www.perl.org/get.html>
FROM CPAN
Install sources from CPAN including all dependencies:
cpanm App::wdq
First install cpanm <https://github.com/miyagawa/cpanminus/#installation> if missing. If installation of
"App::wdq" fails try cpanm option "--notest" or install dependencies as packages as described below.
PREBUILD PACKAGES
Install dependencies as prebuild packages for your operating system:
# Debian based systems e.g. Ubuntu (>= 14.04)
sudo apt-get install libhttp-tiny-perl librdf-query-perl
# Windows/ActiveState
ppm install HTTP-Tiny
ppm install RDF-Query
Then install "wdq" from CPAN as described above or copy the script to some place in your $PATH:
wget https://github.com/nichtich/wdq/raw/master/script/wdq
chmod +x wdq
The latter method will not install this documentation.
MODES
Request mode "query" (default), "lookup", "serch", or "psearch" can explicitly be set via first argument
or it's guessed from arguments.
query
Read SPARQL query from STDIN, option "--query|-q", or argument. Namespace definitions and "SELECT" clause
are added if missing.
wdq '?c wdt:P361 wd:Q544'
wdq '{ ?c wdt:P361 wd:Q544 }' # equivalent
wdq 'SELECT * WHERE { ?c wdt:P361 wd:Q544 }' # equivalent
wdq < queryfile
lookup
Read Wikidata entity ids, URLs, or Wikimedia project URLs from STDIN or arguments. Result fields are
"label", "description", and "id":
wdq Q1
wdq lookup Q1 # equivalent
echo Q1 | wdq lookup # equivalent
wdq http://de.wikipedia.org/wiki/Universum # same result
search / psearch
Search for items or properties. Result fields are "label", "id", "description", and possibly matched
"alias". Search and result language is read from environment or option "--language"/"-g":
wdq search -g sv Pippi Laangstrump
Default output format in search mode is "text".
OPTIONS
--query|-q QUERY
Query or query file ("-" for STDIN as default)
--format|-f FORMAT|TEMPLATE
Output format or string template. Call "wdq help formats" for details.
--export EXPORTER
Use a Catmandu exporter as output format.
--no-header|-H
Exclude header in CSV output or other exporter.
--enumerate|-e
Enumerate results by adding a counter variable "n"
--limit INTEGER
Add or override a LIMIT clause to limitate the number of results. Single-digit options such as "-1"
can also be used to also set a limit.
--ids|-i
Abbreviate Wikidata identifier URIs as strings.
--language|-g
Language to query labels and descriptions in. Set to the locale by default. This option is currentl
only used on lookup mode.
--count|-c VARS
Prepend SPARQL QUERY to count distinct values
--label|-l VARS
--description|-d VARS
--text|-t VARS
Add label, description, or both. Adds "label"/"description" for variable "id" or
"xLabel"/"xDescription" for any "x".
--ignore
Ignore empty results instead of issuing warning and exit code.
--color|-C
By default output is colored if writing to a terminal. Disable this with "--no-color",
"--monochrome", or "-M". Force color with "--color" or "-C".
--api URL
SPARQL endpoint. Default value: "https://query.wikidata.org/bigdata/namespace/wdq/sparql"
--no-mediawiki|-m
Don't query MediaWiki API to map URLs to Wikidata items.
--no-execute|-n
Don't execute SPARQL queries but show them in expanded form. Useful to validate and pretty-print
queries. MediaWiki API requests may be
-N Don't execute any queries. Same as "--no-mediawiki --no-execute".
--help|-h|-?
Show usage help
--ontology
Show information about the Wikidata Ontology
--no-default-prefixes
Don't add default namespace prefixes to the SPARQL query
--man
Show detailled manual
--version|-V
Show version if this script
OUTPUT
Output can be controlled with options "--format"/"-f", "--export", "--header"/"--no-header"/"-H", and
"--color"/"--no-color"/"-C".
Formats
Option "--format"/"-f" sets an output format or string template:
"simple" (default in query and lookup mode)
Flat JSON without language tags
"text" (default in search mode)
Print "label", "alias", "id" and "description" or "count" when counting. Also sets option "--ids".
"ldjson"
Line delimited Flat JSON
"csv"
SPARQL Query Results CSV Format. Suppress header with option "--no-header"/"-H". Use Catmandu CSV
exporter for more options
"tsv"
SPARQL Query Results TSV Format
"xml"
SPARQL Query Results XML Format
"json"
SPARQL Query Results JSON Format
"..."
String template. Call "wdq help pretty" for details
Pretty
Option "--format" can be set to a string template with bracket expressions with optional template
parameters (for instance "{id|pre= (|post=)}").
style
Highlight "n" name, "v" value, "i" identifier, "t" title, or "e" error
length
Abbreviate long values
align
Use "left" or "right" to align short values to a given "length"
pre/post
Add string before/after value
Export
Option "--export" sets a Catmandu exporter to create output with. Given the corresponding exporter
modules installed, one can write results as "YAML", Excel ("XLS"), and Markdown table ("Table") among
other formats:
wdq --export YAML # short form
wdq --format ldjson | catmandu convert to YAML # equivalent
Use Catmandu config file ("catmandu.yml") to further configure export. See also tools such as jq
<http://stedolan.github.io/jq/> and miller <http://johnkerl.org/miller/> for processing results.
EXAMPLES
# search "solar system" in English (=> Q544)
wdq -g en solar system
# search part-of property (=> P361)
wdq psearch -g en part
# get all parts of the solar system
wdq '?c wdt:P361 wd:Q544'
# look up label and description
wdq Q42 P9
# look up German Wikipedia article and get label description in French
wdq -g fr http://de.wikipedia.org/wiki/Argon
# get all references used at an item
wdq 'wd:Q1 ?prop [ prov:wasDerivedFrom ?ref ]'
# get doctoral advisor graph (academic genealogy) as CSV
wdq '?student wdt:P184 ?advisor' --ids --format csv
# print expanded SPARQL query
wdq -n '?c wdt:P361 wd:Q544'
# execute query and return first 10 tab-separated values
wdq -f tsv --limit 10 < query
# print result as Markdown Table (requires Catmandu::Exporter::Table)
wdq --export Table < query
# count instances (P31) of books (Q571)
wdq --count x '?x wdt:P31 wd:Q571'
# list types (P279) of Exoplanets (Q44559) with label and description
wdq '?id wdt:P279 wd:Q44559:' --text id --format text
WIKIDATA ONTOLOGY
Entity (item/property)
wd:Q* <-- owl:sameAs --> wd:Q*
--> rdfs:label, skos:altLabel, schema:description "*"@*
--> schema:dateModified, schema:version
--> wdt:P* "*", URI, _:blank
--> p:P* Statement
Item
wd:Q* <-- schema:about <http://*.wikipedia.org/wiki/*>
--> schema:inLanguage, wikibase:badge
Property
wd:P* --> wikibase:propertyType PropertyType
--> wkibase:directClaim wdt:P*
--> wikibase:claim p:P*
--> wikibase:statementProperty ps:P*
--> wikibase:statementValue psv:P*
--> wikibase:qualifier pq:P*
--> wikibase:qualifierValue pqv:P*
--> wikibase:reference pr:P*
--> wikibase:referenceValue prv:P*
--> wikibase:novalue wdno:P*
PropertyType
wikibase: String, Url, WikibaseItem, WikibaseProperty, CommonsMedia, Math,
Monolingualtext, GlobeCoordinate, Quantity, Time, ExternalId
Statement
wds:* --> wikibase:rank Rank
--> a wdno:P*
--> ps:P* "*", URI, _:blank
--> psv:P* Value
--> pq:P* "*", URI, _:blank
--> pqv:P* Value
--> prov:wasDerivedFrom Reference
Reference
wdref:* --> pr:P* "*", URI
--> prv:P* Value
Rank
wikibase: NormalRank, PreferredRank, DeprecatedRank, BestRank
Value (GlobecoordinateValue/QuantityValue/TimeValue)
wdv:* --> wikibase: geoLatitude, geoLongitude, geoPrecision, geoGlobe URI
--> wikibase: timeValue, timePrecision, timeTimezone, timeCalendarModel
--> wikibase: quantityAmount, quantityUpperBound, quantityLowerBound,
quantityUnit URI
COPYRIGHT AND LICENSE
Copyright by Jakob Voss "voss@gbv.de"
Based on a PHP script by Marius Hoch "hoo@online.de" at <https://github.com/mariushoch/asparagus>.
Licensed under GPL 2.0+
perl v5.32.1 2021-10-01 WDQ(1p)