Principle 3 Understandable · Guideline 3.1: Readable
3.1.4 Abbreviations
Abbreviations are expanded on first use.
What this means in practice
Spell it out the first time, then use the short form. The abbr element can help in addition.
Normative wording
The binding text lives at the W3C. What you read here is our own faithful rendering – not a quotation.