getPossibleCols: Get possible column names for a studbook.
In rmsharp/nprcmanager: Genetic Tools for Colony Management

Pedigree curation function

1	getPossibleCols()

@return A character vector of the possible columns that can be in a studbook. The possible columns are as follows:

id – character vector with unique identifier for an individual
sire – character vector with unique identifier for an individual's father (NA if unknown).
dam – character vector with unique identifier for an individual's mother (NA if unknown).
sex – factor levels: "M", "F", "U" Sex specifier for an individual
gen – integer vector with the generation number of the individual
birth – Date or NA (optional) with the individual's birth date
exit – Date or NA (optional) with the individual's exit date (death, or departure if applicable)
ancestry – character vector or NA (optional) that indicates the geographic population to which the individual belongs.
age – numeric or NA (optional) indicating the individual's current age or age at exit.
population – an optional logical argument indicating whether or not the id is part of the extant population.
origin – character vector or NA (optional) that indicates the name of the facility that the individual was imported from. NA indicates the individual was not imported.
status – an optional factor indicating the status of an individual with levels ALIVE, DEAD, and SHIPPED.
condition – character vector or NA (optional) that indicates the restricted status of an animal. "Nonrestricted" animals are generally assumed to be naive.
spf – character vector or NA (optional) indicating the specific pathogen-free status of an individual.
vasxOvx – character vector indicating the vasectomy/ovariectomy status of an animal where NA indicates an intact animal and all other values indicate surgical alteration.
pedNum – integer vector indicating generation numbers for each id, starting at 0 for individuals lacking IDs for both parents.