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).

Access 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> providing taxonomic, geographic, and conservation information about Peru's endemic plant species. The package offers functions to check 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.

Originally forked from the R part of 'REDCapRITS' by Paul Egeler. 
    See <https://github.com/pegeler/REDCapRITS>.
    'REDCap' database casting and handling of castellated data when using 
    repeated instruments and longitudinal projects. Keeps a focused data export 
    approach, by allowing to only export required data from the database.
    'REDCap' (Research Electronic Data Capture) is a secure, web-based software
    platform designed to support data capture for research studies, providing
    1) an intuitive interface for validated data capture; 2) audit trails for
    tracking data manipulation and export procedures; 3) automated export
    procedures for seamless data downloads to common statistical packages; and
    4) procedures for data integration and interoperability with external 
    sources (Harris et al (2009) <doi:10.1016/j.jbi.2008.08.010>; 
    Harris et al (2019) <doi:10.1016/j.jbi.2019.103208>).