25: conforming printer MUST NOT treat [an] attribute [marked as N/A] as an error: (a) accesskey, (a) charset, (a) hreflang, (a) rel, (a) rev, (a) tabindex, (a) type
Tests for assertions 25

<a> tag (inline, underlined, blue): W3C with accesskey="W", W3C with charset="us-ascii", W3C with hreflang="mn", W3C with rel="Start", W3C with rev="Chapter", W3C with tabindex="1", W3C with type="unknown/unknown"