rcrossref (version 0.5.0)

cr_types: Search CrossRef types

Description

Search CrossRef types

Usage

cr_types(types = NULL, query = NULL, filter = NULL, offset = NULL,
  limit = NULL, sample = NULL, sort = NULL, order = NULL,
  facet = FALSE, works = FALSE, cursor = NULL, cursor_max = 5000,
  .progress = "none", ...)
cr_types_(types = NULL, query = NULL, filter = NULL, offset = NULL,
  limit = NULL, sample = NULL, sort = NULL, order = NULL,
  facet = FALSE, works = FALSE, cursor = NULL, cursor_max = 5000,
  .progress = "none", parse = FALSE, ...)

Arguments

types

(character) Type identifier, e.g., journal

query

Query terms

filter

Filter options. See details.

offset

Number of record to start at, from 1 to infinity.

limit

Number of results to return in the query. Not relavant when searching with specific dois. Default: 20. Max: 1000

sample

(integer) Number of random results to return. when you use the sample parameter, the rows and offset parameters are ignored. Ignored unless works=TRUE

sort

(character) Field to sort on, one of score, relevance, updated, deposited, indexed, or published.

order

(character) Sort order, one of 'asc' or 'desc'

facet

(logical) Include facet results. Default: FALSE

works

(logical) If TRUE, works returned as well, if not then not.

cursor

(character) Cursor character string to do deep paging. Default is None. Pass in '*' to start deep paging. Any combination of query, filters and facets may be used with deep paging cursors. While rows may be specified along with cursor, offset and sample c

cursor_max

(integer) Max records to retrieve. Only used when cursor param used. Because deep paging can result in continuous requests until all are retrieved, use this parameter to set a maximum number of records. Of course, if there are less records found than thi

.progress

Show a plyr-style progress bar? Options are "none", "text", "tk", "win", and "time". See create_progress_bar for details of each. Only used when passing in multiple ids (e.g.

...

Named parameters passed on to GET

parse

(logical) Whether to output json FALSE or parse to list TRUE. Default: FALSE

Details

BEWARE: The API will only work for CrossRef DOIs.

References

https://github.com/CrossRef/rest-api-doc/blob/master/rest_api.md

Examples

cr_types()
cr_types("monograph")
cr_types("monograph", works=TRUE)
cr_types(c('monograph', 'book-set', 'book', 'book-track'))
cr_types(c('monograph', 'book-set'), works=TRUE)

## get facets back
cr_types("journal-article", works=TRUE, facet=TRUE)$facets
cr_types(c('monograph', 'book-set'), works=TRUE, facet=TRUE)

# Use the cursor for deep paging
cr_types("journal-article", works = TRUE, cursor = "*", cursor_max = 500, limit = 100)
cr_types(c('monograph', 'book-set'), works = TRUE, cursor = "*",
   cursor_max = 300, limit = 100)
   
# query doesn't work unless using works=TRUE
### you get results, but query param is silently dropped
cr_types(query = "ecology")

# print progress - only works when passing more than one type
cr_types(c('monograph', 'book-set'), works=TRUE, .progress='text')

# Low level function - does no parsing to data.frame, get json or a list
cr_types_('monograph')
cr_types_('monograph', parse = TRUE)
cr_types_("journal-article", works = TRUE, cursor = "*", 
   cursor_max = 300, limit = 100)
cr_types_("journal-article", works = TRUE, cursor = "*", 
   cursor_max = 300, limit = 100, parse = TRUE)