Heading Levels

Test info

This test is based on the WCAG 2.0 Technique PDF9: Providing headings by marking content with heading tags in PDF documents

Failure cause

Document does not have consistent heading levels

The heading level tags in the documents are used inconsistently. Heading levels have been skipped (for instance level 1 followed by level 3).

Why this may be a barrier

Inconsistent structure in the document such as wrong order of heading elements makes it difficult to follow the document structure. Since some users skim through a document by navigating its headings, it is important to use them appropriately to convey document structure. Inappropriate use of heading elements can cause barriers for blind people using screen readers.

Related WCAG 2.0 Technique

PDF9: Providing headings by marking content with heading tags in PDF documents

References

Related WCAG 1.0 Checkpoint

3.5 “Use header elements to convey document structure and use them according to specification [Priority 2]” WCAG 1.0 Checkpoint 3.5

Related WCAG 2.0 Success Criteria

1.3.1 Info and Relationships “Information, structure, and relationships conveyed through presentation can be programmatically determined or are available in text. (Level A)”

WCAG 2.0 Success Criterion 1.3.1

2.4.1 Bypass Blocks “A mechanism is available to bypass blocks of content that are repeated on multiple Web pages. (Level A)”

WCAG 2.0 Success Criterion 2.4.1

Difi guidelines for universal design of electronic documents