CGI_Value

The Value structures are for when you need 1. a qualifier, 2. to be able to use either single values or ranges, or 3. to express uncertainty on numeric values 4. use numbers or words as alternatives for a single value or in a mixed range e.g. "usually X", "greater than Y" where X and Y are either a Measure (number with a scale) or Term (word from a vocabulary) or a range constructed from measures and terms