Editing Collation (section)

==Labeling of ordered items==
In some contexts, numbers and letters are used not so much as a basis for establishing an ordering, but as a means of labeling items that are already ordered. For example, pages, sections, chapters, and the like, as well as the items of lists, are frequently "numbered" in this way. Labeling series that may be used include ordinary [[Arabic numerals]] (1, 2, 3, ...), [[Roman numerals]] (I, II, III, ... or i, ii, iii, ...), or letters (A, B, C, ... or a, b, c, ...). (An alternative method for indicating list items, without numbering them, is to use a [[bulleted list]].)

When letters of an alphabet are used for this purpose of [[enumeration]], there are certain language-specific conventions as to which letters are used. For example, the [[Russian alphabet|Russian]] letters [[Ъ]] and [[Ь]] (which in writing are only used for modifying the preceding [[consonant]]), and usually also [[Ы]], [[Й]], and [[Ё]], are omitted. Also in many languages that use extended [[Latin script]], the [[modified letter]]s are often not used in enumeration.