Prints the kind, canonical unit, and (for categorical traits) the shared
vocabulary of a trait, and returns a data.frame of the sources
add_trait() draws from – one row per source, with its enrichment, source
column, citation, and the harmonization note (unit conversion or vocabulary
mapping).
Arguments
- trait
Character. A single trait name; see
list_traits().
Value
A data.frame (invisibly-friendly) with columns source,
enrichment, column, citation, note (unit or vocabulary
harmonization), and caution (a method or definition difference from the
reference source, or NA). The header line (label, kind, unit, default
priority, vocabulary) is printed as a message.