What is the significance of the DOCTYPE declaration with respect to validation?
- It allows the browser to optimize memory usage.
- It defines the set of rules against which the document is checked.
- It enhances the security of the document.
- It increases the loading speed of the page.
The DOCTYPE declaration is pivotal for validation because it determines the set of rules the document will be checked against. Validators use the specified DOCTYPE to understand which version of HTML or XHTML is being used and then checks the document's compliance against the appropriate specifications. Without this, validation tools wouldn't know which standards and rules to apply, leading to ambiguous or incorrect validation results.
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