Generative Structure
Structure (Content Structure, Index S) contributes 40% of the AIA Score and applies a heading heuristic to a generated outline of the scanned pages.
How it is scored today
The structure heuristic evaluates a generated outline, not each page’s original HTML.
It starts at 100 when the outline contains exactly one H1 and at 75 otherwise. Deductions apply when the generated outline starts below H1 or skips heading levels.
The current pipeline feeds one generated H1 per scanned page into this heuristic. As a result, a single-page scan receives 100 and a multi-page scan receives 75 for Structure.
The calculation does not check the original HTML’s H1 count or skipped heading levels. No semantic-tag ratio, such as <main> or <article> versus <div>, is calculated.
See AIA Score Explained for the full calculation.
Recommended practices (not currently scored)
These are good practices for AI systems and people, but they do not change the current score:
- Use semantic HTML elements such as
<main>,<article>, and<nav>for their intended purposes. - Give each page one descriptive H1.
- Use a logical heading hierarchy without skipping levels.
- Write descriptive headings that explain the content beneath them.