perletter

Perletter is a term used to describe actions, measurements, or analyses that are applied to each individual letter in a string of text rather than to the string as a whole. The term is not widely standardized and can appear in different contexts with varying specifics.

In typography and digital typesetting, per-letter considerations refer to adjustments or styles applied to each glyph separately, such as per-letter kerning, colorization, or shaping in complex scripts. In font design and rendering, this can influence readability and visual aesthetics.

In computing and data processing, perletter processing means applying a transformation to every character in a text independently. Examples include per-letter case conversion, per-letter hashing, or per-letter encryption schemes where each letter is mapped independently.

In linguistics and corpus analysis, per-letter analysis examines frequency, distribution, or patterns at the level of individual letters, as opposed to letter groups such as digrams or syllables. This approach can be used to study orthography, encoding, or editorial tooling.

History and usage: The term perletter does not denote a single established concept and is typically defined by the author or field. It may appear in documentation, research notes, or informal discussions rather than formal standards. See also related concepts such as letter frequency, orthography, and glyph.