W3C Markup Validation Service

As explained in WordPress Power Toolkit: Harness AI to build next-level websites

The W3C Markup Validation Service is a web service that checks HTML documents for conformance errors.

The W3C Markup Validation Service helps find HTML mistakes that can stop a link from working. Paste a page permalink into the validator, read its error report, then correct the flagged code. section 3.5.2

Use it when a hyperlink behaves unexpectedly:

• Proofread first for missing symbols or incorrect quotation marks. section 3.5.2
• Paste the affected page’s permalink into the service. section 3.5.2
• Use the report to locate and fix the error, such as an unquoted attribute or curly quotation marks. section 3.5.2

Fixing a broken link

A link with its first quotation mark omitted was reported as having an unquoted attribute. The validator also flagged curly quotation marks, making both fixes clear. section 3.5.2

Validation can describe bugs in your HTML code.

The validation result illustrates how an HTML bug can be described for correction. section 3.5.2

How WordPress Power Toolkit: Harness AI to build next-level websites covers it

How deep it goes

Demonstrates permalink submission and interpreting reports for quotation-mark and attribute errors; defers broader HTML validation details.

Examples

Uses Mexican and Thai recipe-page links with a missing quotation mark and curly quotation marks.

What it assumes

Assumes a published page permalink and basic HTML link code while explaining common punctuation mistakes.

What you can do after

Diagnose/debug with it by submitting a permalink and correcting reported HTML link errors.

How it connects

Connects HTML, hyperlinks, permalinks, attributes, quotation marks, and debugging.

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Related concepts

• debugginguses · Debugging is the systematic process of investigating software behavior to locate, diagnose, and correct defects or their causes.

This explainer was generated by Manning's knowledge graph from the text of WordPress Power Toolkit: Harness AI to build next-level websites. The section links point to the parts of the book it draws on.