#' Deprecated functions in rcrossref
#'
#' None at the moment
#'
#' @name rcrossref-deprecated
NULL
#' Defunct functions in rcrossref
#'
#' These functions are gone, no longer available.
#'
#' \itemize{
#' \item [cr_citation()]: Crossref is trying to sunset their
#' OpenURL API, which this function uses. So this function is now removed.
#' See the function [cr_cn()], which does the same things, but with
#' more functionality, using the new Crossref API.
#' \item [pmid2doi()] and [doi2pmid()]: The API behind
#' these functions is down for good, see [id_converter()] for
#' similar functionality.
#' \item [cr_search()]: The functionality of this function can
#' be achieved with the new Crossref API. See functions [cr_works()]
#' et al.
#' \item [cr_search_free()]: The functionality of this function can
#' be achieved with the new Crossref API. See functions [cr_works()]
#' et al.
#' \item [crosscite()]: The functionality of this function can be
#' achieved with [cr_cn()]
#' \item [cr_fundref()]: Crossref changed their name "fundref"
#' to "funders", so we've changed our function, see [cr_funders()]
#' \item [cr_ft_text()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [cr_ft_links()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [cr_ft_pdf()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [cr_ft_plain()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [cr_ft_text()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [cr_ft_xml()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [as.tdmurl()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' \item [extract_xpdf()]: This function and other text mining
#' functions are incorporated in a new package `crminer`.
#' }
#'
#' @name rcrossref-defunct
NULL
#' fundref
#'
#' @export
#' @rdname cr_fundref-defunct
#' @keywords internal
`cr_fundref` <- function(...) { # nocov start
.Defunct(
new = "cr_funders",
package = "rcrossref",
msg = "Removed - see cr_funders()"
)
} # nocov end
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