Accessibility Questions: Nested ordered list as navigation breadcrumb

[Jonathan Hung]

Hi everyone,

A navigation breadcrumb is typically a sequence of text links implying a
hierarchical relationship between breadcrumbs. A logical implementation in
HTML would be to use an ordered list, however there are two approaches to
doing this:

1. A flat ordered list.
2. A nested ordered list.

Example: Item 1 > Item 2 > Item 3

Approach 1 - Flat List: <ol><li>Item 1</li> <li>Item 2</li> <li>Item
3</li></ol>
Approach 2 - Nested List: <ol><li>Item 1</li> <li><ol><li>Item 2</li>
<li><ol><li>Item 3</li></ol></li></ol></li></ol>


Question 1: Which of these approaches would be preferred with respect to
accessible navigation? The nested list approach carries more relational
information, but may be unnecessary.  Seems to me that Approach 2 is better
suited for a menu system and not necessarily for flat navigation.

Question 2: Is there an alternative implementation that should be
considered?

Thanks!

- Jonathan.

---
Jonathan Hung / jhung.utoronto at gmail.com
Fluid Project - ATRC at University of Toronto
Tel: (416) 946-3002
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