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24 <a name="opentype-shaping-models"></a>OpenType shaping models</h2></div></div></div>
26 OpenType provides shaping models for the following scripts:
28 <div class="itemizedlist"><ul class="itemizedlist" style="list-style-type: disc; ">
29 <li class="listitem"><p>
30 The <span class="emphasis"><em>default</em></span> shaping model handles all
31 non-complex scripts, and may also be used as a fallback for
32 handling unrecognized scripts.
36 The <span class="emphasis"><em>Indic</em></span> shaping model handles the Indic
37 scripts Bengali, Devanagari, Gujarati, Gurmukhi, Kannada,
38 Malayalam, Oriya, Tamil, Telugu, and Sinhala.
41 The Indic shaping model was revised significantly in
42 2005. To denote the change, a new set of <span class="emphasis"><em>script
43 tags</em></span> was assigned for Bengali, Devanagari,
44 Gujarati, Gurmukhi, Kannada, Malayalam, Oriya, Tamil, and
45 Telugu. For the sake of clarity, the term "Indic2" is
46 sometimes used to refer to the current, revised shaping
50 <li class="listitem"><p>
51 The <span class="emphasis"><em>Arabic</em></span> shaping model supports
52 Arabic, Mongolian, N'Ko, Syriac, and several other connected
55 <li class="listitem"><p>
56 The <span class="emphasis"><em>Thai/Lao</em></span> shaping model supports
57 the Thai and Lao scripts.
59 <li class="listitem"><p>
60 The <span class="emphasis"><em>Khmer</em></span> shaping model supports the
63 <li class="listitem"><p>
64 The <span class="emphasis"><em>Myanmar</em></span> shaping model supports the
65 Myanmar (or Burmese) script.
67 <li class="listitem"><p>
68 The <span class="emphasis"><em>Tibetan</em></span> shaping model supports the
71 <li class="listitem"><p>
72 The <span class="emphasis"><em>Hangul</em></span> shaping model supports the
75 <li class="listitem"><p>
76 The <span class="emphasis"><em>Hebrew</em></span> shaping model supports the
79 <li class="listitem"><p>
80 The <span class="emphasis"><em>Universal Shaping Engine</em></span> (USE)
81 shaping model supports complex scripts not covered by one of
82 the above, script-specific shaping models, including
83 Javanese, Balinese, Buginese, Batak, Chakma, Lepcha, Modi,
84 Phags-pa, Tagalog, Siddham, Sundanese, Tai Le, Tai Tham, Tai
85 Viet, and many others.
87 <li class="listitem"><p>
88 Text runs that do not fall under one of the above shaping
89 models may still require processing by a shaping engine. Of
90 particular note is <span class="emphasis"><em>Emoji</em></span> shaping, which
91 may involve variation-selector sequences and glyph
92 substitution. Emoji shaping is handled by the default
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