drones: A Patent Dataset for Drone Technology

#' @title Titles Abstracts and First Claims for Drones
#' @description The titles, abstracts and first claims for 15,776 patent publications containing the word drone or drones from the \href{https://clarivate.com/products/derwent-innovation/}{Clarivate Analytics Derwent Innovation}
#' @details Patent data fields are commonly concatenated with a semicolon and require tidying for accurate counts.
#' @usage data("tac")
#' @aliases tac
#' @format{ A data frame with 15,776 observations of 12 variables:
#'  \describe{
#'    \item{\code{abstract}}{The original document abstract, 12798 93 percent of documents, a character vector}
#'    \item{\code{abstract_english}}{The english document abstract, 12295 94 percent of documents, a character vector}
#'    \item{\code{application_number}}{The long application number including the date, 15776 100 percent of documents, a character vector}
#'    \item{\code{first_claim}}{The first claim in a patent document, 15376 97 percent of documents, a character vector}
#'    \item{\code{inpadoc_family_members}}{INPADOC Family Members in long format with dates, 49625 97 percent of documents, a character vector}
#'    \item{\code{inpadoc_first_family_member}}{The earliest publication number in the inpadoc_family_members based on the date, 9,020, 98 percent of documents, a character vector}
#'    \item{\code{priority_number}}{Patent priority numbers in long format with dates, 23382 99 percent of documents, a character vector}
#'    \item{\code{publication_number}}{Publication numbers in short form minus dates, 18970 100 percent of documents, a character vector}
#'    \item{\code{publication_year}}{The year of publication of the publication numbers, 145 99 percent of documents, a character vector}
#'    \item{\code{related_application_numbers}}{Details of related patent applications, 7906 38 percent of documents, a character vector}
#'    \item{\code{title_english}}{The english title, 11113 99 percent of documents, a character vector}
#'    \item{\code{title_original}}{The original title, normally concatenated as English, French, German etc, 14324 97 percent of documents, a character vector}
#'
#'  }
#' }
#' @source \href{https://clarivate.com/products/derwent-innovation/}{Clarivate Analytics Derwent Innovation}
"tac"