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Metadata of the horizon attributes

Source: R/attribute-spec.R
horizon_attribute_spec.Rd

One row per canonical horizon column (see horizon_column_spec), in its order, with the section it belongs to, its unit, a description and the alternative column names that are recognised for it. The metadata come from inst/schemas/horizon-attributes.yaml, which also records, where known, which classification keys read an attribute, the values a categorical attribute takes and the range of a numeric one.

Usage

horizon_attribute_spec()

Value

A data.frame with the columns name, type ("numeric" or "character"), section, unit, description, aliases, systems and allowed (comma-separated, empty when none), and min and max (NA when not recorded).

See also

horizon_column_spec, ensure_horizon_schema.

Examples

a <- horizon_attribute_spec()
a[a$name %in% c("clay_pct", "cec_cmol"), c("name", "unit", "description")]
#>        name       unit                                   description
#> 20 clay_pct   % (mass)      Clay content of the fine earth (< 2 um).
#> 28 cec_cmol cmol(+)/kg Cation exchange capacity (of the fine earth).