I published 12 techniques in regards to support complex table. The WCAG 2.0 Technique writting style is used.

Edits: Broken links was fixed on April 11, 2014.

1. Defining a Key Cell
2. Defining a Data Row Group
3. Summaries a Data Row Group
4. Structuring the Header Row
5. Describing a Row Header Cell
6. Describing a Row Group Header Cell
7. Defining Column Group Header
8. Structuring the Header Column Cell
9. Defining a Data Column Group
10. Summaries a Data Column Group
11. Describing a Column Header Cell
12. Defining a Layout Cell

HTML Table Validator

Validate your table by using the HTML Table Validator

Case Studies

1. Nutrition Facts table
2. Ottawa Senators vs. Buffalo Sabres – Game ID # 270519002