A bit misleading title/function name - it validates input values, according to rules set in general input attributes (length) or class-specific ones (nchar, nlevels or limit).
check.input.value(input, value = NULL, attribute.name = c("length", "nchar",
"nlevels", "limit"))input item
input value, either template-defined, or set by the user
input attributes containing validation rules (defaults to length)