Archaeological Stratigraphy and Chronological Sequences R package stratigraphr version 0.5.0 A tidy framework for working with archaeological stratigraphy and chronology. Includes tools for reading, analysing, and visualising stratigraphic sequences (Harris matrices) as directed graphs following the definition of Dye and Buck (2015) <doi:10.1016/j.jas.2015.08.008> and an R interface to the Chronological Query Language (CQL) used in 'OxCal' by Bronk Ramsey (2009) <doi:10.1017/S0033822200033865>. Software Depends: R (>= 4.1) Imports: cli, Rdpack, checkmate, glue, igraph (>= 0.3.0), pillar, purrr, relations, rlang, sets, stringr, tidygraph, utils, vctrs, vroom, Suggests: covr, dplyr, ggraph, knitr, oxcAAR, readr, readxl, rmarkdown, spelling, testthat, tibble Joe Roe <joe@joeroe.io> Comprehensive R Archive Network (CRAN) Joe Roe [aut, cre, cph] (ORCID: <https://orcid.org/0000-0002-1011-1244>) MIT + file LICENSE (https://CRAN.R-project.org/package=stratigraphr/LICENSE) 2026-09-12 application/tgz https://CRAN.R-project.org/package=stratigraphr doi:10.32614/CRAN.package.stratigraphr en-GB