English: This category only includes scripts (using their standard orthographies) having simple and predictable joining rules between adjacent base letters (in absence of line breaks between them in the middle of a word), and where discretionary exceptions to these rules may be controlled by inserting joining controls (ZWJ or ZWNJ) between adjacent sequences of base letters and combining diacritics, and not needing complex reordering of letters in the same script. For normative Unicode joining properties (defined notably for characters encoded for the following scripts and that may have multiple contextual joining forms, distinguished notably between their initial, medial, final or isolated forms), see ArabicShaping.txt, extracted/DerivedJoiningType.txt and extracted/DerivedJoiningGroup.txt in the Unicode Character Database.

• Most of the following scripts (but not all) are Semitic abjads (where most base letters represent consonants in their alphabets, and combining diacritics are used to represent most vowels), or are derived from Semitic abjads.
• Most of the following scripts are written horizontally from right to left (with the exception of the traditional Mongolian, Old Uyghur, Phagspa, and Sogdian scripts, which are traditionally written vertically from top to bottom, but which may occasionally be written horizontally from left to right by a simple orthogonal rotation of their glyphs) and require the additional support of bidirectional writing in text rendererers (for correct visual ordering of glyphs, including those representing digits or numerals, punctuation marks, symbols or white spaces, or characters from other scripts) before determining the contextual joining forms (after determining the position of line breaks where their normal joining is interrupted).

Notes :

• Other scripts (including Latin, Greek, Cyrillic, or sinograms) may also have developed over time various cursive or handwritten letters styles, but usually without distinctive forms (these cursive or handwritten forms may also be very contextual, but they are not normative and may vary depending on specific calligraphic or typographic styles; they may also depend on historical, regional or author-specific variants or for specific purposes like decorative styles, emphasizing, abbreviation ligatures, traditional religious or honorific monograms, branding and logos, or personal signatures). These traditional cursive styles are being phased out in most modern texts (notably on computer interfaces and visual medias) and in basic education in most countries.
• However, some of these other scripts (notably the abugidas used in some Brahmic scripts, such as Devanagari) are also normally written using glyphs with contextual joining forms (in their standard orthography), but their ligation follows a more complex logic where these glyphs are not necessarily representing immediately adjacent base letters, but only one of them in each adjacent composite syllabic structure (or akshara) possibly containing multiple base letters ; as well the joining between these aksharas is not normative or distinctive, and may be discretionary interrupted (or may even not exist at all in the standard orthography for a large subset of these scripts); the base letters and the combining characters (notably vowel signs) in each akshara adopt contextual forms and layouts (with or without ligation) on the top, bottom, left or right of the first base letter in the akshara, possibly with reordering or breaking the letter or combining vowel into several separated glyphs with independent layouts : for this reason, these more complex scripts are not listed in this category.