The aim of this package is to manipulate relational
   data models in R.
   It provides functions to create, modify and export data models
   in json format.
   It also allows importing models created
   with 'MySQL Workbench' (<https://www.mysql.com/products/workbench/>).
   These functions are accessible through a graphical user
   interface made with 'shiny'.
   Constraints such as types, keys, uniqueness and mandatory fields are
   automatically checked and corrected when editing a model.
   Finally, real data can be confronted to a model to check their compatibility.

Provides functions used in the 'R: Einführung durch angewandte Statistik' (second edition).

Import 'REDATAM' formats into R via the 'Open REDATAM' C++ library.
    The full context of this project and details about the implementation are
    available in <doi:10.1017/dap.2025.4> (Open Access).

Provides an API to work with 'Redatam' (see <https://redatam.org>) 
  databases in both formats: 'RXDB' (new format) and 'DICX' (old format) and running 
  'Redatam' programs written in 'SPC' language. It's a wrapper around 'Redatam' 
  core and provides functions to open/close a database (redatam_open()/redatam_close()), 
  list entities and variables from the database (redatam_entities(), redatam_variables()) 
  and execute a 'SPC' program and gets the results as data frames 
  (redatam_query(), redatam_run()).

Provides access to and analysis of data from "The Red Book of Endemic Plants of Peru" (León, B., Roque, J., Ulloa, C., Jorgensen, P.M., Pitman, N., Cano, A. 2006) <doi:10.15381/rpb.v13i2.1782>. This package offers comprehensive taxonomic, geographic, and conservation information about Peru's endemic plant species. It includes functions to verify species inclusion, obtain updated taxonomic details, and explore the dataset.

Access data stored in 'REDCap' databases using the Application
    Programming Interface (API).  'REDCap' (Research Electronic Data CAPture;
    <https://projectredcap.org>, Harris, et al. (2009) <doi:10.1016/j.jbi.2008.08.010>, 
    Harris, et al. (2019) <doi:10.1016/j.jbi.2019.103208>) is
    a web application for building and managing online surveys and databases
    developed at Vanderbilt University.  The API allows users to access data
    and project meta data (such as the data dictionary) from the web
    programmatically. The 'redcapAPI' package facilitates the process of
    accessing data with options to prepare an analysis-ready data set
    consistent with the definitions in a database's data dictionary.