bdo Element

 

Module

The bdo element is an inline element declared by the XHTML 1.1 Bi-directional Text Module

This is the only element in this Module.

Description

The bdo element is an inline element and is used in situations where it is necessary to override the inherent directionality (left-to-right or right-to-left) of the element's text content on a character-by-character basis. The dir attribute is mandatory on this element and must given either of the two values "rtl" or "ltr". For more information, see *W3C HTML4.01: Overriding the bidirectional algorithm which covers use of the element in HTML 4.01 - it has the same functionality in XHTML 1.1. A language code may also be specified using the optional xml:lang attribute.

For more detail, see the dir attribute.

#REQUIRED Attributes

The dir attribute is #REQUIRED on the bdo element.

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Specific Attributes

There are no specific attributes declared on the bdo element.

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Common Attributes

From the Core Attribute Collection

class [ type NMTOKENS ]

One or more space separated classes

id [ type ID ]

A unique identifier for the element

style [ type CDATA ], from the Style Attribute Module (deprecated)

Element-specific styles

title [ type Text ]

Descriptive title for the element (in some user agents this may appear as a "tooltip" when the mouse hovers over the element)

xmlns [ type URI - #FIXED 'http://www.w3.org/1999/xhtml' ]

XML namespace

From the I18N Attribute Collection

dir [ type Enumeration (ltr | rtl) - #REQUIRED ], from the Bi-directional Text Module

Left-to-right or right-to-left directionality of text, on a character-by-character basis, overriding the UNICODE bi-directional algorithm

xml:lang [ type LanguageCode ]

A language code for the element

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Content Model

The Content Model for the bdo element is:

( #PCDATA | Inline.mix )*

See Content Model & Nesting for information about Content Model syntax and Nesting Groups.

Valid children of bdo

• #PCDATA
• From the Text Module: abbr, acronym, br, cite, code, dfn, em, kbd, q, samp, span, strong, var
• From the Hypertext Module: a
• From the Forms Module: button, input, label, select, textarea
• From the Images Module: img
• From the Presentation Module: b, big, i, small, sub, sup, tt
• From the Client-side Image Map Module: map
• From the Scripting Module: noscript, script
• From the Edit Module: del, ins
• From the Bi-directional Text Module: bdo
• From the Object Module: object
• From the Ruby Annotation Module: ruby

Valid parents of bdo

• From the Text Module: abbr, acronym, address, cite, code, dfn, div, em, h1 - h6, kbd, p, pre, q, samp, span, strong, var
• From the Hypertext Module: a
• From the List Module: dd, dt, li
• From the Tables Module: caption, td, th
• From the Forms Module: button, fieldset, label, legend
• From the Presentation Module: b, big, i, small, sub, sup, tt
• From the Edit Module: del, ins
• From the Bi-directional Text Module: bdo
• From the Object Module: object
• From the Ruby Annotation Module: rb, rt