ckanr
Client for the Comprehensive Knowledge Archive Network ('CKAN') 'API'
Client for 'CKAN' 'API' ( http://ckan.org/). Includes interface to 'CKAN' 'APIs' for search, list, show for packages, organizations, and resources. In addition, provides an interface to the 'datastore' 'API'.
ckanr is an R client for the CKAN API.
It is meant to be as general as possible, allowing you to work with any CKAN instance.
Stable CRAN version
install.packages("ckanr")Development version
install.packages("devtools")devtools::install_github("ropensci/ckanr")library('ckanr')Note: the default base CKAN URL is set to
http://data.techno-science.ca/.
Functions requiring write permissions in CKAN additionally require a privileged
CKAN API key.
You can change this using ckanr_setup(), or change the URL using the url
parameter in each function call.
To set one or both, run:
ckanr_setup() # restores default CKAN url to http://data.techno-science.ca/ckanr_setup(url = "http://data.techno-science.ca/")ckanr_setup(url = "http://data.techno-science.ca/", key = "my-ckan-api-key")ckanr package API
There are a suite of CKAN things (package, resource, etc.) that each have a set of functions in this package. The functions for each CKAN thing have an S3 class that is returned from most functions, and can be passed to most other functions (this also facilitates piping). The following is a list of the function groups for certain CKAN things, with the prefix for the functions that work with that thing, and the name of the S3 class:
- Packages (aka packages) -
package_*()-ckan_package - Resources -
resource_*()-ckan_resource - Related -
related_*()-ckan_related - Users -
user_*()-ckan_user - Groups -
group_*()-ckan_group - Tags -
tag_*()-ckan_tag - Organizations -
organization_*()-ckan_organization - Groups -
group_*()-ckan_group - Users -
user_*()-ckan_user - Related items -
related_*()-ckan_related
The S3 class objects all look very similar; for example:
<CKAN Resource> 8abc92ad-7379-4fb8-bba0-549f38a26ddb Name: Data From Digital Portal Description: Creator/Modified: 2015-08-18T19:20:59.732601 / 2015-08-18T19:20:59.657943 Size: Format: CSV All classes state the type of object, have the ID to the right of the type, then have a varying set of key-value fields deemed important. This printed object is just a summary of an R list, so you can index to specific values (e.g., result$description). If you feel there are important fields left out of these printed summaries, let us know.
Packages
List packages
package_list(as = "table")#> [1] "artifact-data-agriculture" #> [2] "artifact-data-aviation" #> [3] "artifact-data-bookbinding" #> [4] "artifact-data-chemistry" #> [5] "artifact-data-communications" #> [6] "artifact-data-computing-technology" #> [7] "artifact-data-domestic-technology" #> [8] "artifact-data-energy-electric" #> [9] "artifact-data-exploration-and-survey" #> [10] "artifact-data-fisheries" ...Show a package
package_show('34d60b13-1fd5-430e-b0ec-c8bc7f4841cf')#> <CKAN Package> 34d60b13-1fd5-430e-b0ec-c8bc7f4841cf #> Title: Artifact Data - Vacuum Tubes#> Creator/Modified: 2014-10-28T18:12:11.453636 / 2014-11-05T21:25:16.848989#> Resources (up to 5): Artifact Data - Vacuum Tubes (XML), Data Dictionary, Tips (English), Tips (French)#> Tags (up to 5): Vacuum Tubes#> Groups (up to 5): communicationsSearch for packages
x <- package_search(q = '*:*', rows = 2)x$results#> [[1]]#> <CKAN Package> f4406699-3e11-4856-be48-b55da98b3c14 #> Title: Artifact Data - Horology#> Creator/Modified: 2014-10-28T16:50:30.068996 / 2015-03-30T15:06:55.218176#> Resources (up to 5): Artifact Data - Horology (XML), Data Dictionary, Tips (English), Tips (French)#> Tags (up to 5): Horology#> Groups (up to 5): scientific-instrumentation#> #> [[2]]#> <CKAN Package> 0a801729-aa94-4d76-a5e0-7b487303f4e5 #> Title: Artifact Data - Astronomy#> Creator/Modified: 2014-10-24T19:16:59.160533 / 2015-01-09T23:33:13.972898#> Resources (up to 5): Artifact Data - Astronomy (XML), Data Dictionary, Tips (English), Tips (French)#> Tags (up to 5): Astronomy, Scientific Instrumentation#> Groups (up to 5): scientific-instrumentationResources
Search for resources
x <- resource_search(q = 'name:data', limit = 2)x$results#> [[1]]#> <CKAN Resource> e179e910-27fb-44f4-a627-99822af49ffa #> Name: Artifact Data - Exploration and Survey (XML)#> Description: XML Dataset#> Creator/Modified: 2014-10-28T15:50:35.374303 / #> Size: #> Format: XML#> #> [[2]]#> <CKAN Resource> ba84e8b7-b388-4d2a-873a-7b107eb7f135 #> Name: Data Dictionary#> Description: Data dictionary for CSTMC artifact datasets.#> Creator/Modified: 2014-11-03T18:01:02.094210 / #> Size: #> Format: XLSUsers
List users
user_list()[1:2]#> [[1]]#> <CKAN User> ee100ca6-2363-4db8-b24b-066e865c33ec #> Name: CSTMC#> Display Name: CSTMC#> Full Name: #> No. Packages: #> No. Edits: 0#> Created: 2014-10-16T18:15:03.685929#> #> [[2]]#> <CKAN User> de64d5d4-86ab-4510-820b-f0bd86ea7a79 #> Name: default#> Display Name: default#> Full Name: #> No. Packages: #> No. Edits: 0#> Created: 2014-03-20T02:55:40.628968Groups
List groups
group_list(as = 'table')[, 1:3]#> display_name description#> 1 Communications #> 2 Domestic and Industrial Technology #> 3 Everything #> 4 Location #> 5 Resources #> 6 Scientific Instrumentation #> 7 Transportation #> title#> 1 Communications#> 2 Domestic and Industrial Technology#> 3 Everything#> 4 Location#> 5 Resources#> 6 Scientific Instrumentation#> 7 TransportationShow a group
group_show('communications', as = 'table')$users#> openid about capacity name created#> 1 NA <NA> admin marc 2014-10-24T14:44:29.885262#> 2 NA admin sepandar 2014-10-23T19:40:42.056418#> email_hash sysadmin#> 1 a32002c960476614370a16e9fb81f436 FALSE#> 2 10b930a228afd1da2647d62e70b71bf8 TRUE#> activity_streams_email_notifications state number_of_edits#> 1 FALSE active 379#> 2 FALSE active 44#> number_administered_packages display_name fullname#> 1 39 marc <NA>#> 2 1 sepandar #> id#> 1 27778230-2e90-4818-9f00-bbf778c8fa09#> 2 b50449ea-1dcc-4d52-b620-fc95bf56034bTags
List tags
tag_list('aviation', as = 'table')#> vocabulary_id display_name#> 1 NA Aviation#> 2 NA Canada Aviation and Space Museum#> id name#> 1 cc1db2db-b08b-4888-897f-a17eade2461b Aviation#> 2 8d05a650-bc7b-4b89-bcc8-c10177e60119 Canada Aviation and Space MuseumShow tags
tag_show('Aviation')$packages[[1]][1:3]#> $owner_org#> [1] "fafa260d-e2bf-46cd-9c35-34c1dfa46c57"#> #> $maintainer#> [1] ""#> #> $relationships_as_object#> list()Organizations
List organizations
organization_list()#> [[1]]#> <CKAN Organization> fafa260d-e2bf-46cd-9c35-34c1dfa46c57 #> Name: cstmc#> Display name: CSTMC#> No. Packages: #> No. Users: 0Examples of different CKAN APIs
See ckanr::servers() for a list of CKAN servers. Ther are 124 as of 2015-10-21.
The Natural History Museum
Website: http://data.nhm.ac.uk/
ckanr_setup(url = "http://data.nhm.ac.uk")x <- package_search(q = '*:*', rows = 1)x$results#> [[1]]#> <CKAN Package> 56e711e6-c847-4f99-915a-6894bb5c5dea #> Title: Collection specimens#> Creator/Modified: 2014-12-08T16:39:22.346941 / 2015-09-30T13:42:02.859838#> Resources (up to 5): Specimens#> Tags (up to 5): #> Groups (up to 5):NAThe National Geothermal Data System
Website: http://geothermaldata.org/
ckanr_setup("http://search.geothermaldata.org")x <- package_search(q = '*:*', rows = 1)x$results#> [[1]]#> <CKAN Package> 428701c7-1b99-424a-a2ae-829cfe37794c #> Title: Pagosa Springs borehole lithology intervals#> Creator/Modified: 2015-10-08T20:37:41.620696 / 2015-10-08T20:38:56.525277#> Resources (up to 5): Borehole Lithology of Pagosa Springs Temperature Gradient wells#> Tags (up to 5): #> Groups (up to 5):NAMeta
- Please report any issues or bugs.
- License: MIT
- Get citation information for
ckanrin R doingcitation(package = 'ckanr') - Please note that this project is released with a Contributor Code of Conduct. By participating in this project you agree to abide by its terms.
