Decide whether the web page is the report or a summary
A full HTML edition should contain the argument, supporting exhibits, methods, material qualifications and evidence links. A summary can be useful too, but label it as a summary and make the complete report easy to reach. Do not describe a short promotional page as the full accessible version when the findings needed to check its headline exist only in the download.
This distinction also matters for canonical URLs, which tell search engines which URL you prefer for duplicate or very similar content. Google supports a canonical link in an HTTP response header for non-HTML files such as PDFs. That can express a preference when a PDF and HTML page carry equivalent content. A short summary is not automatically an equivalent replacement for a full report. Canonicalization is a signal to Google, not a guarantee of the selected URL. Google's canonical guidance
Decide the relationship before configuring it. Keep both formats reachable for readers, label the download, and have the person responsible for the site verify the actual HTTP response and destination. A canonical setting cannot repair a factual disagreement between editions.
Record what must match before layout
For each finding, record what must survive in both formats. The wording and placement may differ; the claim and the evidence needed to interpret it should not.
Scroll horizontally to compare every column. Every column remains available.
| Element | HTML edition | PDF edition | Release check |
|---|---|---|---|
| Main finding | A readable sentence beside its evidence | The same finding beside the exhibit | Same meaning and scope |
| Population | Questions, dates, engines and included records | The same study population | No silent change of denominator |
| Chart | Visible labels and a text or table alternative | Legible chart, caption and accessible structure | Values, units and exclusions match |
| Supporting evidence | Links to the exact evidence and methods | Working links or readable references | Destination supports the stated claim |
| Revision | Edition date and correction note | Edition date and correction note | Reader can identify the same version |
For example, if a chart shows usable answers, do not label its total “attempts” elsewhere. If one engine had unavailable captures, carry that limitation into the caption in both editions. The reader should not need to open an appendix to discover that a percentage excluded failed collection.
Give each material finding a stable internal identifier in your source manuscript or publishing record. That lets an editor follow one correction through its sentence, table, chart, caption and downloadable file. It need not appear as an unexplained code in the published article.
Check the PDF's text and reading order
A visually correct PDF can have a confusing reading order. W3C's PDF reading-order technique describes checking the order exposed to assistive technology and the keyboard sequence through links and controls. Its heading technique explains how tagged headings allow readers using assistive technology to navigate sections. These are documented techniques, not a complete accessibility certification. W3C reading order, W3C headings
Export real text where possible. If a report exists only as scans, optical character recognition can create text, but inspect the recognized words, figures and reading order. A misread decimal can change the result. W3C scanned-PDF text guidance
For the HTML edition, inspect the article at desktop and narrow phone widths. Check that the chart's explanation is visible, tables remain usable, keyboard users can reach evidence links, and the essential findings remain available without JavaScript. These are practical acceptance checks; passing them does not establish full accessibility conformance.
Follow one finding through both editions
Choose the most consequential claim and read it as a skeptical new reader. Can you find the collection dates, understand the counted population, see the strongest qualification and reach the supporting evidence from either edition?
Then compare every chart and data table across formats. Check units, labels, rounding, source notes and omissions. A design export that keeps yesterday's image while updating today's paragraph has not passed the cross-format check.
Use separate verdicts for factual consistency and rendering. Matching text does not establish readable layout. A successful phone screenshot does not establish that the exported chart uses the right numbers. Record who checked each, what version they saw and any untested surfaces.
Correct the claim everywhere it appears
When a result changes, update the source manuscript first, then the affected HTML, PDF, chart alternatives and correction note. Retain the prior edition in the publication record. If the old PDF URL remains available, make its status understandable rather than leaving two apparently current reports in circulation.
Keep collection date, publication date and correction date separate. Republishing a corrected report does not make the underlying measurement newer. For URL changes, use the separate page-migration guide to preserve working destinations and historical references.
A finished release lets a reader move between the page and the download without losing evidence or changing the conclusion. That is the immediate benefit to verify. Any effect on search discovery or AI citation would need its own observation.