Kilotest: Diagnoses of attribute value invalid violation by HTML element 173 on Sightline Institute page

Basics

About the Sightline Institute page

• URL: https://www.sightline.org/
• Tested 29 days ago by job wxv on 2026-05-03 at 17:04

About HTML element 173

• Tag name: svg
• Text: [not applicable]
• Start tag: <svg viewBox="0 0 512 512" aria-hidden="true" xmlns="https://www.w3.org/2000/svg" width="1em" height="1em">
• XPath: /html/body/header[1]/div[1]/div[2]/a[1]/span[1]/svg[1]
• Bounding box: x = 1259, y = 36, width = 18, height = 18

About the attribute value invalid issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1

Diagnoses

Here is how tools diagnose the attribute value invalid issue for HTML element 173 of the Sightline Institute page.

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)