core_advanced_search: Advanced Search CORE

In rcoreoa: Client for the CORE API

Description

Advanced Search CORE

Usage

core_advanced_search(
  ...,
  page = 1,
  limit = 10,
  key = NULL,
  parse = TRUE,
  .list = list()
)

core_query(..., op = "AND")

Arguments

...	for core_query(), query fields, see Details. for core_advanced_search() any number of queries, results of calling core_query(). Required. See Details.
page	(character) page number (default: 1), optional
limit	(character) records to return (default: 10, minimum: 10, maximum: 100), optional
key	A CORE API key. Get one at https://core.ac.uk/api-keys/register. Once you have the key, you can pass it into this parameter, or as a much better option, store your key as an environment variable with the name CORE_KEY or an R option as core_key. See ?Startup for how to work with env vars and R options
parse	(logical) Whether to parse to list (FALSE) or data.frame (TRUE). Default: TRUE
.list	alternative to passing core_query() calls to ...; just create a list of them and pass to this parameter; easier for programming with
op	(character) operator to combine multiple fields. options: AND, OR

Details

query should be one or more calls to core_query(), (at least one is required):

• title

• description

• fullText

• authors

• publisher: string, to be used as an absolute match against the publisher name metadata field

• repositories.id: repository id

• repositories.name: repository name

• doi: string, to be used as an absolute match against the repository name metadata field (all other fields will be ignored if included)

• oai

• identifiers

• language.name: string, to filter against languages specified in https://en.wikipedia.org/wiki/ISO_639-1

• year: year to filter to

core_advanced_search does the HTTP request and parses, while core_advanced_search_ just does the HTTP request, gives back JSON as a character string

Value

data.frame with the following columns:

• status: string, which will be 'OK' or 'Not found' or 'Too many queries' or 'Missing parameter' or 'Invalid parameter' or 'Parameter out of bounds'

• totalHits: integer, Total number of items matching the search criteria

• data: list, a list of relevant resource

References

https://core.ac.uk/docs/#!/all/searchBatch

Examples

## Not run: 
## compose queries
core_query(title="psychology", year=2014)
core_query(title="psychology", year=2014, op="OR")
core_query(identifiers='"oai:aura.abdn.ac.uk:2164/3837"',
  identifiers='"oai:aura.abdn.ac.uk:2164/3843"', op="OR")

## do actual searches
core_advanced_search(
  core_query(identifiers='"oai:aura.abdn.ac.uk:2164/3837"',
    identifiers='"oai:aura.abdn.ac.uk:2164/3843"', op="OR")
)

res <- core_advanced_search(
  core_query(title="psychology"),
  core_query(doi='"10.1186/1471-2458-6-309"'),
  core_query(language.name="german")
)
res

## End(Not run)

rcoreoa documentation built on July 8, 2020, 7:30 p.m.