{
  "_id": "6a1fde8cb401979e73438cca",
  "Package": "aion",
  "Title": "Archaeological Time Series",
  "Version": "1.7.0.9000",
  "Authors@R": "c(\nperson(\"Nicolas\", \"Frerebeau\", , \"nicolas.frerebeau@u-bordeaux-montaigne.fr\", role = c(\"aut\", \"cre\"),\ncomment = c(ORCID = \"0000-0001-5759-4944\")),\nperson(\"Joe\", \"Roe\", , \"joseph.roe@iaw.unibe.ch\", role = \"aut\",\ncomment = c(ORCID = \"0000-0002-1011-1244\")),\nperson(\"Brice\", \"Lebrun\", role = \"art\",\ncomment = c(ORCID = \"0000-0001-7503-8685\", \"Logo designer\")),\nperson(\"Université Bordeaux Montaigne\", role = \"fnd\",\ncomment = c(ROR = \"03pbgwk21\")),\nperson(\"CNRS\", role = \"fnd\",\ncomment = c(ROR = \"02feahw73\"))\n)",
  "Maintainer": "Nicolas Frerebeau\n<nicolas.frerebeau@u-bordeaux-montaigne.fr>",
  "Description": "A toolkit for archaeological time series and time\nintervals. This package provides a system of classes and\nmethods to represent and work with archaeological time series\nand time intervals. Dates are represented as \"rata die\" and can\nbe converted to (virtually) any calendar defined by Reingold\nand Dershowitz (2018) <doi:10.1017/9781107415058>. This\npackages offers a simple API that can be used by other\nspecialized packages.",
  "License": "GPL (>= 3)",
  "URL": "https://codeberg.org/tesselle/aion,\nhttps://tesselle.r-universe.dev/aion,\nhttps://packages.tesselle.org/aion/",
  "BugReports": "https://codeberg.org/tesselle/aion/issues",
  "VignetteBuilder": "knitr",
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  "Collate": "'AllClasses.R' 'AllGenerics.R' 'aion-internal.R'\n'aion-package.R' 'axis.R' 'calendar-gregorian.R'\n'calendar-julian.R' 'calendar.R' 'coerce.R' 'convert.R'\n'data.R' 'format.R' 'graph.R' 'intervals.R' 'mutators.R'\n'operators.R' 'overlap.R' 'plot.R' 'relations.R' 'series.R'\n'show.R' 'span.R' 'subset.R' 'time.R' 'validate.R' 'year.R'\n'zzz.R'",
  "Config/roxygen2/version": "8.0.0",
  "Repository": "https://tesselle.r-universe.dev",
  "Date/Publication": "2026-05-04 08:50:01 UTC",
  "RemoteUrl": "https://codeberg.org/tesselle/aion",
  "RemoteRef": "HEAD",
  "RemoteSha": "db5655c5a677bb5f50ef8069466925210d6e5178",
  "NeedsCompilation": "no",
  "Packaged": {
    "Date": "2026-06-03 07:55:05 UTC",
    "User": "root"
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  "Author": "Nicolas Frerebeau [aut, cre] (ORCID:\n<https://orcid.org/0000-0001-5759-4944>),\nJoe Roe [aut] (ORCID: <https://orcid.org/0000-0002-1011-1244>),\nBrice Lebrun [art] (ORCID: <https://orcid.org/0000-0001-7503-8685>,\nLogo designer),\nUniversité Bordeaux Montaigne [fnd] (ROR: <https://ror.org/03pbgwk21>),\nCNRS [fnd] (ROR: <https://ror.org/02feahw73>)",
  "MD5sum": "ec7cd4a684a3d66b033ef5ea4cba3a40",
  "_user": "tesselle",
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  "_created": "2026-06-03T07:55:05.000Z",
  "_published": "2026-06-03T07:58:04.091Z",
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    "Arith",
    "as_date",
    "as_decimal",
    "as_fixed",
    "as_year",
    "as.data.frame",
    "b2k",
    "BC",
    "BCE",
    "BP",
    "calendar",
    "calendar_direction",
    "calendar_epoch",
    "calendar_fixed",
    "calendar_label",
    "calendar_name",
    "calendar_unit",
    "calendar_year",
    "CE",
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    "convert",
    "during",
    "end",
    "equals",
    "finished_by",
    "finishes",
    "fixed",
    "fixed_from_AD",
    "fixed_from_b2k",
    "fixed_from_BC",
    "fixed_from_BCE",
    "fixed_from_BP",
    "fixed_from_CE",
    "fixed_from_julian",
    "fixed_to_AD",
    "fixed_to_b2k",
    "fixed_to_BC",
    "fixed_to_BCE",
    "fixed_to_BP",
    "fixed_to_CE",
    "fixed_to_julian",
    "flip",
    "format",
    "frequency",
    "get_calendar",
    "graph_create",
    "graph_prune",
    "image",
    "intervals",
    "is_calendar",
    "is_gregorian",
    "is_julian",
    "J",
    "meets",
    "met_by",
    "overlap",
    "overlapped_by",
    "overlaps",
    "plot",
    "preceded_by",
    "precedes",
    "pretty",
    "series",
    "set_calendar",
    "span",
    "start",
    "started_by",
    "starts",
    "time",
    "window",
    "year_axis"
  ],
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    {
      "name": "dates",
      "title": "Sample Data from Reingold and Dershowitz (2018)",
      "object": "dates",
      "class": [
        "data.frame"
      ],
      "fields": [
        "rata_die",
        "weekday",
        "jd",
        "mjd",
        "unix",
        "gregorian_year",
        "gregorian_month",
        "gregorian_day",
        "julian_year",
        "julian_month",
        "julian_day",
        "egyptian_year",
        "egyptian_month",
        "egyptian_day"
      ],
      "rows": 33,
      "table": true,
      "tojson": true
    }
  ],
  "_help": [
    {
      "page": "arithmetic",
      "title": "Arithmetic Operators",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "Arith,numeric,RataDie-method",
        "Arith,RataDie,numeric-method",
        "Arith,RataDie,RataDie-method",
        "arithmetic"
      ]
    },
    {
      "page": "as_date",
      "title": "Date Conversion from _Rata Die_",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "as_date",
        "as_date,numeric,GregorianCalendar-method",
        "as_date,numeric,JulianCalendar-method",
        "as_date-method"
      ]
    },
    {
      "page": "as_decimal",
      "title": "Converts a Date to a Decimal of its Year",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "as_decimal",
        "as_decimal,numeric,numeric,numeric,GregorianCalendar-method",
        "as_decimal,numeric,numeric,numeric,JulianCalendar-method",
        "as_decimal-method"
      ]
    },
    {
      "page": "as_fixed",
      "title": "Coerce to _Rata Die_",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "as_fixed",
        "as_fixed,numeric-method",
        "as_fixed-method"
      ]
    },
    {
      "page": "as_year",
      "title": "Year Conversion from _Rata Die_",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "as_year",
        "as_year,numeric,GregorianCalendar-method",
        "as_year,numeric,JulianCalendar-method",
        "as_year-method"
      ]
    },
    {
      "page": "as.data.frame",
      "title": "Coerce to a Data Frame",
      "concept": [
        "mutators"
      ],
      "topics": [
        "as.data.frame",
        "as.data.frame,TimeIntervals-method",
        "as.data.frame,TimeSeries-method"
      ]
    },
    {
      "page": "calendar",
      "title": "Calendar",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "calendar",
        "calendar,character-method",
        "calendar-method"
      ]
    },
    {
      "page": "calendar_get",
      "title": "Calendar Parameters",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "calendar_direction",
        "calendar_direction,NULL-method",
        "calendar_direction,TimeScale-method",
        "calendar_direction-method",
        "calendar_epoch",
        "calendar_epoch,TimeScale-method",
        "calendar_epoch-method",
        "calendar_fixed",
        "calendar_fixed,TimeScale-method",
        "calendar_fixed-method",
        "calendar_get",
        "calendar_label",
        "calendar_label,TimeScale-method",
        "calendar_label-method",
        "calendar_name",
        "calendar_name,TimeScale-method",
        "calendar_name-method",
        "calendar_unit",
        "calendar_unit,TimeScale-method",
        "calendar_unit-method",
        "calendar_year",
        "calendar_year,TimeScale-method",
        "calendar_year-method"
      ]
    },
    {
      "page": "convert",
      "title": "Calendar Converter",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "convert",
        "convert,character,character-method",
        "convert,TimeScale,TimeScale-method",
        "convert-method"
      ]
    },
    {
      "page": "dates",
      "title": "Sample Data from Reingold and Dershowitz (2018)",
      "concept": [
        "datasets"
      ],
      "topics": [
        "dates"
      ]
    },
    {
      "page": "fixed",
      "title": "_Rata Die_ (Fixed Date)",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "fixed",
        "fixed,numeric,missing,missing,GregorianCalendar-method",
        "fixed,numeric,missing,missing,JulianCalendar-method",
        "fixed,numeric,numeric,numeric,GregorianCalendar-method",
        "fixed,numeric,numeric,numeric,JulianCalendar-method",
        "fixed-method"
      ]
    },
    {
      "page": "fixed_gregorian",
      "title": "_Rata Die_ Conversion to and from Gregorian Years",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "fixed_from_AD",
        "fixed_from_b2k",
        "fixed_from_BC",
        "fixed_from_BCE",
        "fixed_from_BP",
        "fixed_from_CE",
        "fixed_gregorian",
        "fixed_to_AD",
        "fixed_to_b2k",
        "fixed_to_BC",
        "fixed_to_BCE",
        "fixed_to_BP",
        "fixed_to_CE"
      ]
    },
    {
      "page": "fixed_julian",
      "title": "_Rata Die_ Conversion to and from Julian Years",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "fixed_from_julian",
        "fixed_julian",
        "fixed_to_julian"
      ]
    },
    {
      "page": "flip",
      "title": "Transposition",
      "concept": [
        "mutators"
      ],
      "topics": [
        "flip",
        "flip,TimeSeries-method"
      ]
    },
    {
      "page": "format",
      "title": "Date Conversion to Character",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "format",
        "format,RataDie-method",
        "format,TimeIntervals-method",
        "format,TimeScale-method"
      ]
    },
    {
      "page": "get_calendar",
      "title": "Get or Set the Default Calendar",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "get_calendar",
        "set_calendar"
      ]
    },
    {
      "page": "graph_create",
      "title": "Create a Graph",
      "concept": [
        "graph tools"
      ],
      "topics": [
        "graph_create",
        "graph_create,data.frame-method",
        "graph_create,matrix-method",
        "graph_create,TimeIntervals-method",
        "graph_create-method"
      ]
    },
    {
      "page": "graph_prune",
      "title": "Prune a Graph",
      "concept": [
        "graph tools"
      ],
      "topics": [
        "graph_prune",
        "graph_prune,igraph-method",
        "graph_prune-method"
      ]
    },
    {
      "page": "gregorian",
      "title": "Gregorian Calendar",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "AD",
        "b2k",
        "BC",
        "BCE",
        "BP",
        "CE",
        "gregorian"
      ]
    },
    {
      "page": "image",
      "title": "Heat Map",
      "concept": [
        "plotting tools"
      ],
      "topics": [
        "image",
        "image,TimeSeries-method"
      ]
    },
    {
      "page": "intervals",
      "title": "Create Time Intervals",
      "concept": [
        "time intervals"
      ],
      "topics": [
        "intervals",
        "intervals,numeric,numeric,TimeScale-method",
        "intervals,RataDie,RataDie,missing-method",
        "intervals-method"
      ]
    },
    {
      "page": "is_calendar",
      "title": "Is an Object a Calendar?",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "is_calendar",
        "is_gregorian",
        "is_julian"
      ]
    },
    {
      "page": "julian",
      "title": "Julian Calendar",
      "concept": [
        "calendar tools"
      ],
      "topics": [
        "J",
        "julian"
      ]
    },
    {
      "page": "labels",
      "title": "Labels",
      "concept": [
        "mutators"
      ],
      "topics": [
        "labels",
        "labels,TimeIntervals-method",
        "labels,TimeSeries-method"
      ]
    },
    {
      "page": "length",
      "title": "Length",
      "concept": [
        "mutators"
      ],
      "topics": [
        "length",
        "length,TimeIntervals-method"
      ]
    },
    {
      "page": "names",
      "title": "Names",
      "concept": [
        "mutators"
      ],
      "topics": [
        "names",
        "names,TimeIntervals-method",
        "names<-,TimeIntervals-method"
      ]
    },
    {
      "page": "overlap",
      "title": "Time Overlap",
      "concept": [
        "temporal relations"
      ],
      "topics": [
        "overlap",
        "overlap,TimeIntervals-method",
        "overlap-method"
      ]
    },
    {
      "page": "plot",
      "title": "Plot Time Series and Time Intervals",
      "concept": [
        "plotting tools"
      ],
      "topics": [
        "plot",
        "plot,TimeIntervals,missing-method",
        "plot,TimeSeries,missing-method"
      ]
    },
    {
      "page": "pretty",
      "title": "Pretty Breakpoints",
      "concept": [
        "fixed date tools"
      ],
      "topics": [
        "pretty",
        "pretty,RataDie-method"
      ]
    },
    {
      "page": "RataDie-class",
      "title": "RataDie",
      "concept": [
        "classes",
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