Annotation rules for numbers and numerals need to be dealt with as a whole. So far, there are only some individual rules; these constitute the content of the present section. The proper representation of numbers and numerals is also discussed in the section on mathematical operations and intervals (see Section 11, "Mathematical operations and intervals").

The annotation of numerals written in words and those written in digits follow basically the same rules; exceptions are noted in appropriate places in the respective subsections (especially in Section 10.2.3, "Complex numerical expressions" and Section 10.2.4, "Decimals and fractions").