11.5 The bidi-override object

11.5 The bidi-override object

Purpose

• It specifies how to manage and override the inherent Unicode text direction for a sequence of characters .

• This is not needed for standard processing of a mixture of writing-mode characters, as the processor will recognize the inherent text direction and act accordingly .

Content

• ( 6.6.2 ) (#PCDATA %inline; %block; )* ,

• child objects (listed alphabetically ):

  • %block; ( 6.2 ; 69),

  • %inline; ( 6.2 ; 70),

• any number of marker children at the beginning.

Property sets

• Common aural properties ( 7.6 ; 327),

• common font properties ( 7.8 ; 331),

• common relative position properties ( 7.12 ; 333).

Other optional properties

• color ( 7.17.1 ; 369),

• direction ( 7.27.1 ; 373),

• id ( 7.28.2 ; 384),

• letter-spacing ( 7.16.2 ; 389),

• line-height ( 7.15.4 ; 390),

• score-spaces ( 7.28.6 ; 412),

• unicode-bidi ( 7.27.6 ; 424),

• word-spacing ( 7.16.8 ; 428).

Shorthand influencing the above properties

• font ( 7.29.13 ; 377).

Properties of interest

• unicode-bidi

  • Use " embed " to wrap groups of characters that are to progress in the writing direction of the parent construct;

    • this preserves the inherent writing direction of the characters in the group .

  • Use " bidi-override " to force the wrapped characters to progress in the writing direction of the parent construct;

    • this overrides the inherent writing direction of the characters in the group.

• direction

  • Use " ltr " and " rtl " to specify the direction of the embedded characters.

  • The default direction is that of the parent construct.