Range searches: Generally used for Age, Place, and Bib# (short for "bib number," also known as competitor number or race number), this allows searches of the following form:
15 ... an exact match for #15 (age, place, etc.)
15+ or +15 ... 15 or higher
15- or -15 ... 15 or lower
15-25 ... between 15 and 25
The "low" value must be less than the "high" value and they must encompass at least some portion of the results.