ISO 2145


International standard ISO 2145 defines a typographic convention for the "numbering of divisions and subdivisions in written documents". It applies to any kind of document, including manuscripts, books, journal articles, and standards.

Description

The ISO 2145 numbering scheme is defined by the following rules:
A table of contents might look like:

Citations

Division and subdivision numbers are cited in written text as in:
In spoken language, the full stops are omitted: