Kilotest: Diagnoses of attribute value invalid violation by HTML element 836 on Sightline Institute page

Here is how tools diagnose the attribute value invalid issue for HTML element 836 of the Sightline Institute page.

Basics

• About the attribute value invalid issue
  • Why it matters: Item behaves improperly
  • Priority: highest
  • Related WCAG standard: 1.3.1
• About the Sightline Institute page
  • URL: https://www.sightline.org/
  • Tested on 2026-04-03 at 04:04
• About HTML element 836
  • Tag name: svg
  • Text: [not applicable]
  • Start tag: <svg aria-hidden="true" role="img" height="1em" width="1em" viewBox="0 0 512 512" xmlns="https://www.w3.org/2000/svg">
  • XPath: /html/body/div[3]/footer[1]/div[1]/div[1]/div[1]/div[1]/div[1]/div[2]/div[1]/p[3]/span[1]/svg[1]
  • Bounding box: x = 564, y = 3395, width = 27, height = 27

Diagnoses

1. Bad value https://www.w3.org/2000/svg for the attribute xmlns (only http://www.w3.org/2000/svg permitted here).

   Tool: Html Checker API (World Wide Web Consortium)