DITA Bootstrap v6

[jason-fox]

The v6 branch updates the specialization plugin to enforce DITA-OT validation (via DTDs) matching the new schema requirements and component definitions of Bootstrap 6.

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1. DTD Element Migrations (Offcanvas to Drawer)

To align with Bootstrap 6 retiring the Offcanvas JS component for native Drawer components:

• Entities Updated (bootstrapDomain.ent):
  • Replaced offcanvas with drawer in the base entities:
    <!ENTITY % drawer "drawer">
  • Updated bootstrap-d-section content model:
    <!ENTITY % bootstrap-d-section "accordion-item | alert | card | drawer | pagination">
• Declarations Updated (bootstrapDomain.mod):
  • Deleted the <offcanvas> element definition.
  • Declared the new <drawer> element and its attributes:
    <!ELEMENT drawer (%drawer.content;)>
  • Mapped the class hierarchy:
    <!ATTLIST drawer class CDATA "+ topic/section bootstrap-d/drawer ">

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2. Updated Color Palettes (Light/Dark $\rightarrow$ Accent/Inverse)

Bootstrap 6 deprecates the light and dark utility classes, replacing them with the semantically flexible accent and inverse values.

• Main Elements & Utilities (bootstrapDomain.mod & bootstrapCommonElements.mod):
  • The color attribute on badge, button, card, carousel, list-group, drawer, popover, tabbed-dialog, tooltip, thumbnail, and note was updated:
    • Old: (primary | secondary | success | danger | warning | info | light | dark)
    • New: (primary | secondary | success | danger | warning | info | accent | inverse)
• Borders & Decoration attributes:
  • Updated border colors to use the new naming convention, including the new subtle variants:
    • Old: light-subtle | dark-subtle
    • New: accent-subtle | inverse-subtle

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3. Sample Document Updates

The sample files packaged with the plugin were fully updated to replace references to the deprecated features:

• sample/offcanvas.dita has been removed and replaced by sample/drawer.dita to document the new specialization element.
• Samples like alerts.dita, badge.dita, buttons.dita, color.dita, and shadows.dita were refactored to use the new accent, inverse, accent-subtle, and inverse-subtle attributes instead of the legacy light/dark properties.