R: Explore 'Wikidata' Through Tidy Data Frames

# Explore 'Wikidata' Through Tidy Data Frames

## Documentation for package ‘tidywikidatar’ version 0.6.2

- DESCRIPTION file
- User guides, package vignettes and other documentation
- Package NEWS
- Package README

## Help Pages

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tw_check_cache | Check caching status in the current session, and override it upon request
tw_check_cached_items | Check if given items are present in cache
tw_check_cache_folder | Checks if cache folder exists, if not returns an informative message
tw_check_cache_index | Check if cache table is indexed
tw_check_pid | Ensures that input appears to be a valid Wikidata property id (i.e. it starts with P and is followed only by digits)
tw_check_qid | Ensures that input appears to be a valid Wikidata id
tw_check_search | Checks if an input is a search; if not, it tries to return a search
tw_connect_to_cache | Return a connection to be used for caching
tw_create_cache_folder | Creates the base cache folder where 'tidywikidatar' caches data.
tw_disable_cache | Disable caching for the current session
tw_disconnect_from_cache | Ensure that connection to cache is disconnected consistently
tw_empty_image_metadata | A zero-rows tibble used internally when 'tw_get_image_metadata()' would not return any value.
tw_empty_item | A zero-rows tibble used internally when 'tw_get()' would not return any value.
tw_empty_qualifiers | A zero-rows tibble used internally when 'tw_get_qualifiers()' would not return any value.
tw_empty_search | A zero-rows tibble used internally when 'tw_search()' would not return any value.
tw_empty_wikipedia_category_members | A zero-rows tibble used internally when 'tw_empty_wikipedia_category_members()' would not return any value.
tw_empty_wikipedia_page | A zero-rows tibble used internally when 'tw_get_wikipedia_page_qid()' would not return any value.
tw_empty_wikipedia_page_links | A zero-rows tibble used internally when 'tw_get_wikipedia_page_links()' would not return any value.
tw_empty_wikipedia_page_sections | A zero-rows tibble used internally when 'tw_get_wikipedia_page_sections()' would not return any value.
tw_enable_cache | Enable caching for the current session
tw_extract_qualifier | Extract qualifiers from a list created with 'tw_get_item()'
tw_extract_single | Extract item data from a list object retrieved from the Wikidata API
tw_filter | Filter search result and keep only items with matching property and Q identifier
tw_filter_first | Filter search result and keep only and keep only the first match
tw_filter_people | Filter search result and keep only people
tw_get | Return (most) information from a Wikidata item in a tidy format
tw_get_all_with_p | Get all items that have a given property (irrespective of the value)
tw_get_cached_item | Retrieve cached item
tw_get_cached_qualifiers | Retrieve cached qualifier
tw_get_cached_search | Retrieve cached search
tw_get_cached_wikipedia_category_members | Gets members of Wikipedia categories from local cache
tw_get_cached_wikipedia_page_links | Gets links of Wikipedia pages from local cache
tw_get_cached_wikipedia_page_qid | Gets id of Wikipedia pages from local cache
tw_get_cached_wikipedia_page_sections | Gets sections of Wikipedia pages from local cache
tw_get_cache_db | Get database connection settings from the environment
tw_get_cache_file | Gets location of cache file
tw_get_cache_folder | Set folder for caching data
tw_get_cache_table_name | Gets name of table inside the database
tw_get_description | Get Wikidata description in given language
tw_get_field | Gets a field such a label or description from a data frame typically generated with 'tw_get()'
tw_get_image | Get image from Wikimedia Commons
tw_get_image_metadata | Get metadata for images from Wikimedia Commons
tw_get_image_metadata_single | Get metadata for images from Wikimedia Commons
tw_get_image_same_length | Get image from Wikimedia Commons
tw_get_item | Retrieve item from the Wikidata API and returns it as a list
tw_get_label | Get Wikidata label in given language
tw_get_language | Set language to be used by all functions
tw_get_p | Get Wikidata property of an item as a vector or list of the same length as input
tw_get_p1 | Get Wikidata property of an item as a character vector of the same length as input
tw_get_property | Get Wikidata property of one or more items as a tidy data frame
tw_get_property_description | Get description of a Wikidata property in a given language
tw_get_property_description_single | Get description of a Wikidata property in a given language
tw_get_property_label | Get label of a Wikidata property in a given language
tw_get_property_label_single | Get label of a Wikidata property in a given language
tw_get_property_same_length | Get Wikidata property of an item as a vector or list of the same length as input
tw_get_property_with_details | Gets all details of a property for one or more Wikidata items.
tw_get_property_with_details_single | Gets all details of a property
tw_get_p_wide | Efficiently get a wide table with various properties of a given set of Wikidata identifiers
tw_get_qualifiers | Get Wikidata qualifiers for a given property of a given item
tw_get_qualifiers_single | Get Wikidata qualifiers for a given property of a given item
tw_get_single | Return (most) information from a Wikidata item in a tidy format from a single Wikidata identifier
tw_get_user_agent | Set language to be used by all functions
tw_get_wikipedia | Get URL to a Wikipedia article corresponding to a Wikidata Q identifier in given language
tw_get_wikipedia_base_api_url | Facilitates the creation of MediaWiki API base URLs
tw_get_wikipedia_category_members | Get all Wikidata Q identifiers of all Wikipedia pages (or files, or subcategories) that are members of the given category,
tw_get_wikipedia_category_members_single | Get all Wikidata Q identifiers of all Wikipedia pages that appear in a given page
tw_get_wikipedia_page_links | Get all Wikidata Q identifiers of all Wikipedia pages that appear in one or more pages
tw_get_wikipedia_page_links_single | Get all Wikidata Q identifiers of all Wikipedia pages that appear in a given page
tw_get_wikipedia_page_qid | Gets the Wikidata Q identifier of one or more Wikipedia pages
tw_get_wikipedia_page_qid_single | Gets the Wikidata id of a Wikipedia page
tw_get_wikipedia_page_sections | Get sections of a Wikipedia page
tw_get_wikipedia_page_sections_single | Get all Wikidata Q identifiers of all Wikipedia pages that appear in a given page
tw_get_wikipedia_page_section_links | Get links from a specific section of a Wikipedia page
tw_get_wikipedia_sections_api_url | Facilitates the creation of MediaWiki API base URLs to retrieve sections of a page
tw_get_wikipedia_section_links_api_url | Facilitates the creation of MediaWiki API base URLs to retrieve sections of a page
tw_index_cache_item | Add index to caching table for search queries for increased speed
tw_index_cache_search | Add index to caching table for search queries for increased speed
tw_label | Gets labels for all columns with names such as "id" and "property".
tw_qid_airports | The Wikidata Q identifier of European airports found in Eurostat's 'avia_par_' dataset
tw_qid_meps | The Wikidata Q identifier of all members of the European Parliament since its establishment
tw_query | Perform simple Wikidata queries
tw_reset_item_cache | Reset item cache
tw_reset_qualifiers_cache | Reset qualifiers cache
tw_reset_wikipedia_category_members_cache | Reset Wikipedia category members cache
tw_reset_wikipedia_page_cache | Reset Wikipedia page cache
tw_reset_wikipedia_page_links_cache | Reset Wikipedia page link cache
tw_reset_wikipedia_page_sections_cache | Reset Wikipedia page link cache
tw_search | Search for Wikidata items or properties and return Wikidata id, label, and description.
tw_search_item | Search for Wikidata properties in Wikidata and return Wikidata id, label, and description.
tw_search_property | Search for Wikidata properties in Wikidata and return Wikidata id, label, and description.
tw_search_single | Search for Wikidata items or properties and return Wikidata id, label, and description.
tw_set_cache_db | Set database connection settings for the session
tw_set_cache_folder | Set folder for caching data
tw_set_language | Set language to be used by all functions
tw_set_user_agent | Set language to be used by all functions
tw_test_items | A list mostly used for testing with some Wikidata items in the format resulting from 'tw_get_item()'
tw_write_item_to_cache | Writes item to cache
tw_write_qid_of_wikipedia_page_to_cache | Write Wikidata identifier (qid) of Wikipedia page to cache
tw_write_qualifiers_to_cache | Write qualifiers to cache
tw_write_search_to_cache | Writes search to cache
tw_write_wikipedia_category_members_to_cache | Write Wikipedia page links to cache
tw_write_wikipedia_page_links_to_cache | Write Wikipedia page links to cache
tw_write_wikipedia_page_sections_to_cache | Write Wikipedia page links to cache