Values of this type denote a numeric integer value.
Allowed values
Must be a sequence of digits (0–9), optionally prefixed with a - or a + character.
Query comparison
Search operators for equality (equal or not equal, has or not has), for lesser values (less or not less), or for greater values (greater or not greater) are executed by converting both the search value and the metadata value into integer values and then comparing them numerically. Integer values must be in the range -9223372036854775808 … 9223372036854775807. Comparisons with metadata values outside this range always returns a negative match. Comparisons with search values outside this range will be executed as a comparison of the string representation values.
All other comparisons (match, not match, prefix, not prefix, suffix, and not suffix) are done on the given string representation of the number. In this case, the number +12 will be treated as different to the number 12.
Sorting
Sorting is done by comparing the numeric values.