| Value | Meaning | 
|---|---|
| INVALID65535 | Initial, unset feature selector | 
| ALL_TYPE_FEATURES_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALL_TYPOGRAPHIC | 
| ALL_TYPE_FEATURES_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALL_TYPOGRAPHIC | 
| REQUIRED_LIGATURES_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| REQUIRED_LIGATURES_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| COMMON_LIGATURES_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| COMMON_LIGATURES_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| RARE_LIGATURES_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| RARE_LIGATURES_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| LOGOS_ON6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| LOGOS_OFF7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| REBUS_PICTURES_ON8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| REBUS_PICTURES_OFF9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| DIPHTHONG_LIGATURES_ON10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| DIPHTHONG_LIGATURES_OFF11 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| SQUARED_LIGATURES_ON12 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| SQUARED_LIGATURES_OFF13 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| ABBREV_SQUARED_LIGATURES_ON14 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| ABBREV_SQUARED_LIGATURES_OFF15 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| SYMBOL_LIGATURES_ON16 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| SYMBOL_LIGATURES_OFF17 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| CONTEXTUAL_LIGATURES_ON18 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| CONTEXTUAL_LIGATURES_OFF19 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| HISTORICAL_LIGATURES_ON20 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| HISTORICAL_LIGATURES_OFF21 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| UNCONNECTED0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| PARTIALLY_CONNECTED1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| CURSIVE2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LIGATURES | 
| UPPER_AND_LOWER_CASE0 | Deprecated | 
| ALL_CAPS1 | Deprecated | 
| ALL_LOWER_CASE2 | Deprecated | 
| SMALL_CAPS3 | Deprecated | 
| INITIAL_CAPS4 | Deprecated | 
| INITIAL_CAPS_AND_SMALL_CAPS5 | Deprecated | 
| SUBSTITUTE_VERTICAL_FORMS_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION | 
| SUBSTITUTE_VERTICAL_FORMS_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_SUBSTITUTION | 
| LINGUISTIC_REARRANGEMENT_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LINGUISTIC_REARRANGEMENT | 
| LINGUISTIC_REARRANGEMENT_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LINGUISTIC_REARRANGEMENT | 
| MONOSPACED_NUMBERS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING | 
| PROPORTIONAL_NUMBERS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING | 
| THIRD_WIDTH_NUMBERS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING | 
| QUARTER_WIDTH_NUMBERS3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_SPACING | 
| WORD_INITIAL_SWASHES_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| WORD_INITIAL_SWASHES_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| WORD_FINAL_SWASHES_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| WORD_FINAL_SWASHES_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| LINE_INITIAL_SWASHES_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| LINE_INITIAL_SWASHES_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| LINE_FINAL_SWASHES_ON6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| LINE_FINAL_SWASHES_OFF7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| NON_FINAL_SWASHES_ON8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| NON_FINAL_SWASHES_OFF9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_SMART_SWASH_TYPE | 
| SHOW_DIACRITICS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DIACRITICS_TYPE | 
| HIDE_DIACRITICS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DIACRITICS_TYPE | 
| DECOMPOSE_DIACRITICS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DIACRITICS_TYPE | 
| NORMAL_POSITION0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION | 
| SUPERIORS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION | 
| INFERIORS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION | 
| ORDINALS3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION | 
| SCIENTIFIC_INFERIORS4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_VERTICAL_POSITION | 
| NO_FRACTIONS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS | 
| VERTICAL_FRACTIONS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS | 
| DIAGONAL_FRACTIONS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_FRACTIONS | 
| PREVENT_OVERLAP_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_OVERLAPPING_CHARACTERS_TYPE | 
| PREVENT_OVERLAP_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_OVERLAPPING_CHARACTERS_TYPE | 
| HYPHENS_TO_EM_DASH_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| HYPHENS_TO_EM_DASH_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| HYPHEN_TO_EN_DASH_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| HYPHEN_TO_EN_DASH_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| SLASHED_ZERO_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| SLASHED_ZERO_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| FORM_INTERROBANG_ON6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| FORM_INTERROBANG_OFF7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| SMART_QUOTES_ON8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| SMART_QUOTES_OFF9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| PERIODS_TO_ELLIPSIS_ON10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| PERIODS_TO_ELLIPSIS_OFF11 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TYPOGRAPHIC_EXTRAS | 
| HYPHEN_TO_MINUS_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| HYPHEN_TO_MINUS_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| ASTERISK_TO_MULTIPLY_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| ASTERISK_TO_MULTIPLY_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| SLASH_TO_DIVIDE_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| SLASH_TO_DIVIDE_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| INEQUALITY_LIGATURES_ON6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| INEQUALITY_LIGATURES_OFF7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| EXPONENTS_ON8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| EXPONENTS_OFF9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| MATHEMATICAL_GREEK_ON10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| MATHEMATICAL_GREEK_OFF11 | for #HB_AAT_LAYOUT_FEATURE_TYPE_MATHEMATICAL_EXTRAS | 
| NO_ORNAMENTS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| DINGBATS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| PI_CHARACTERS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| FLEURONS3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| DECORATIVE_BORDERS4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| INTERNATIONAL_SYMBOLS5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| MATH_SYMBOLS6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ORNAMENT_SETS_TYPE | 
| NO_ALTERNATES0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_ALTERNATIVES | 
| DESIGN_LEVEL10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE | 
| DESIGN_LEVEL21 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE | 
| DESIGN_LEVEL32 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE | 
| DESIGN_LEVEL43 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE | 
| DESIGN_LEVEL54 | for #HB_AAT_LAYOUT_FEATURE_TYPE_DESIGN_COMPLEXITY_TYPE | 
| NO_STYLE_OPTIONS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| DISPLAY_TEXT1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| ENGRAVED_TEXT2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| ILLUMINATED_CAPS3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| TITLING_CAPS4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| TALL_CAPS5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLE_OPTIONS | 
| TRADITIONAL_CHARACTERS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| SIMPLIFIED_CHARACTERS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| JIS1978_CHARACTERS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| JIS1983_CHARACTERS3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| JIS1990_CHARACTERS4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_ALT_ONE5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_ALT_TWO6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_ALT_THREE7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_ALT_FOUR8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_ALT_FIVE9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| EXPERT_CHARACTERS10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| JIS2004_CHARACTERS11 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| HOJO_CHARACTERS12 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| NLCCHARACTERS13 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| TRADITIONAL_NAMES_CHARACTERS14 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CHARACTER_SHAPE | 
| LOWER_CASE_NUMBERS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE | 
| UPPER_CASE_NUMBERS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_NUMBER_CASE | 
| PROPORTIONAL_TEXT0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| MONOSPACED_TEXT1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| HALF_WIDTH_TEXT2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| THIRD_WIDTH_TEXT3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| QUARTER_WIDTH_TEXT4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| ALT_PROPORTIONAL_TEXT5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| ALT_HALF_WIDTH_TEXT6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TEXT_SPACING | 
| NO_TRANSLITERATION0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| HANJA_TO_HANGUL1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| HIRAGANA_TO_KATAKANA2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| KATAKANA_TO_HIRAGANA3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| KANA_TO_ROMANIZATION4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| ROMANIZATION_TO_HIRAGANA5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| ROMANIZATION_TO_KATAKANA6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| HANJA_TO_HANGUL_ALT_ONE7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| HANJA_TO_HANGUL_ALT_TWO8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| HANJA_TO_HANGUL_ALT_THREE9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_TRANSLITERATION | 
| NO_ANNOTATION0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| BOX_ANNOTATION1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| ROUNDED_BOX_ANNOTATION2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| CIRCLE_ANNOTATION3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| INVERTED_CIRCLE_ANNOTATION4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| PARENTHESIS_ANNOTATION5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| PERIOD_ANNOTATION6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| ROMAN_NUMERAL_ANNOTATION7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| DIAMOND_ANNOTATION8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| INVERTED_BOX_ANNOTATION9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| INVERTED_ROUNDED_BOX_ANNOTATION10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ANNOTATION_TYPE | 
| FULL_WIDTH_KANA0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_KANA_SPACING_TYPE | 
| PROPORTIONAL_KANA1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_KANA_SPACING_TYPE | 
| FULL_WIDTH_IDEOGRAPHS0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_SPACING_TYPE | 
| PROPORTIONAL_IDEOGRAPHS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_SPACING_TYPE | 
| HALF_WIDTH_IDEOGRAPHS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_SPACING_TYPE | 
| CANONICAL_COMPOSITION_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| CANONICAL_COMPOSITION_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| COMPATIBILITY_COMPOSITION_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| COMPATIBILITY_COMPOSITION_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| TRANSCODING_COMPOSITION_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| TRANSCODING_COMPOSITION_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UNICODE_DECOMPOSITION_TYPE | 
| NO_RUBY_KANA0 | Deprecated; use #HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_OFF instead | 
| RUBY_KANA1 | Deprecated; use #HB_AAT_LAYOUT_FEATURE_SELECTOR_RUBY_KANA_ON instead | 
| RUBY_KANA_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_RUBY_KANA | 
| RUBY_KANA_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_RUBY_KANA | 
| NO_CJK_SYMBOL_ALTERNATIVES0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| CJK_SYMBOL_ALT_ONE1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| CJK_SYMBOL_ALT_TWO2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| CJK_SYMBOL_ALT_THREE3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| CJK_SYMBOL_ALT_FOUR4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| CJK_SYMBOL_ALT_FIVE5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_SYMBOL_ALTERNATIVES_TYPE | 
| NO_IDEOGRAPHIC_ALTERNATIVES0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| IDEOGRAPHIC_ALT_ONE1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| IDEOGRAPHIC_ALT_TWO2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| IDEOGRAPHIC_ALT_THREE3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| IDEOGRAPHIC_ALT_FOUR4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| IDEOGRAPHIC_ALT_FIVE5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_IDEOGRAPHIC_ALTERNATIVES_TYPE | 
| CJK_VERTICAL_ROMAN_CENTERED0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_VERTICAL_ROMAN_PLACEMENT_TYPE | 
| CJK_VERTICAL_ROMAN_HBASELINE1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_VERTICAL_ROMAN_PLACEMENT_TYPE | 
| NO_CJK_ITALIC_ROMAN0 | Deprecated; use #HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_OFF instead | 
| CJK_ITALIC_ROMAN1 | Deprecated; use #HB_AAT_LAYOUT_FEATURE_SELECTOR_CJK_ITALIC_ROMAN_ON instead | 
| CJK_ITALIC_ROMAN_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ITALIC_CJK_ROMAN | 
| CJK_ITALIC_ROMAN_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ITALIC_CJK_ROMAN | 
| CASE_SENSITIVE_LAYOUT_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT | 
| CASE_SENSITIVE_LAYOUT_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT | 
| CASE_SENSITIVE_SPACING_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT | 
| CASE_SENSITIVE_SPACING_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CASE_SENSITIVE_LAYOUT | 
| ALTERNATE_HORIZ_KANA_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA | 
| ALTERNATE_HORIZ_KANA_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA | 
| ALTERNATE_VERT_KANA_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA | 
| ALTERNATE_VERT_KANA_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_ALTERNATE_KANA | 
| NO_STYLISTIC_ALTERNATES0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_ONE_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_ONE_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWO_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWO_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_THREE_ON6 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_THREE_OFF7 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FOUR_ON8 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FOUR_OFF9 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FIVE_ON10 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FIVE_OFF11 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SIX_ON12 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SIX_OFF13 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SEVEN_ON14 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SEVEN_OFF15 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_EIGHT_ON16 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_EIGHT_OFF17 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_NINE_ON18 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_NINE_OFF19 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TEN_ON20 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TEN_OFF21 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_ELEVEN_ON22 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_ELEVEN_OFF23 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWELVE_ON24 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWELVE_OFF25 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_THIRTEEN_ON26 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_THIRTEEN_OFF27 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FOURTEEN_ON28 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FOURTEEN_OFF29 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FIFTEEN_ON30 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_FIFTEEN_OFF31 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SIXTEEN_ON32 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SIXTEEN_OFF33 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SEVENTEEN_ON34 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_SEVENTEEN_OFF35 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_EIGHTEEN_ON36 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_EIGHTEEN_OFF37 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_NINETEEN_ON38 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_NINETEEN_OFF39 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWENTY_ON40 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| STYLISTIC_ALT_TWENTY_OFF41 | for #HB_AAT_LAYOUT_FEATURE_TYPE_STYLISTIC_ALTERNATIVES | 
| CONTEXTUAL_ALTERNATES_ON0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| CONTEXTUAL_ALTERNATES_OFF1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| SWASH_ALTERNATES_ON2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| SWASH_ALTERNATES_OFF3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| CONTEXTUAL_SWASH_ALTERNATES_ON4 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| CONTEXTUAL_SWASH_ALTERNATES_OFF5 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CONTEXTUAL_ALTERNATIVES | 
| DEFAULT_LOWER_CASE0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE | 
| LOWER_CASE_SMALL_CAPS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE | 
| LOWER_CASE_PETITE_CAPS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_LOWER_CASE | 
| DEFAULT_UPPER_CASE0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE | 
| UPPER_CASE_SMALL_CAPS1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE | 
| UPPER_CASE_PETITE_CAPS2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_UPPER_CASE | 
| HALF_WIDTH_CJK_ROMAN0 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_ROMAN_SPACING_TYPE | 
| PROPORTIONAL_CJK_ROMAN1 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_ROMAN_SPACING_TYPE | 
| DEFAULT_CJK_ROMAN2 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_ROMAN_SPACING_TYPE | 
| FULL_WIDTH_CJK_ROMAN3 | for #HB_AAT_LAYOUT_FEATURE_TYPE_CJK_ROMAN_SPACING_TYPE | 
The selectors defined for specifying AAT feature settings.