Kilotest: Diagnoses of ID not unique violation by HTML element 174 on Oregon Museum of Science and Industry page

Basics

About the Oregon Museum of Science and Industry page

• URL: https://omsi.edu/
• Tested 20 days ago by job 42w on 2026-05-12 at 23:14

About HTML element 174

• Tag name: NAV
• Text: Today's Museum Hours: … Shop
• Start tag: <nav id="nav-main" class="nav-main" role="navigation">
• XPath: /html/body/header[1]/div[1]/nav[1]
• Bounding box: x = 0, y = 0, width = 1920, height = 56

Take me there

About the ID not unique issue

• Why it matters: User may be pointed to the wrong item
• Priority: highest
• Related WCAG standard: 4.1.1

Diagnoses

Here is how tools diagnose the ID not unique issue for HTML element 174 of the Oregon Museum of Science and Industry page.

1. The first occurrence of ID nav-main was here.

   Tool: Html Checker API (World Wide Web Consortium)

2. [failed]

   Tool: QualWeb (University of Lisbon)

   Rule: QW-BP30