この記事はまだボランティアによって 日本語 に翻訳されていません。ぜひ MDN に参加して翻訳を手伝ってください！
The Standard Generalized Markup Language (SGML) is an ISO specification made for defining declarative markup languages.
On the web, HTML 4, XHTML, and XML are popular SGML-based languages. It is worth noting that since its fifth edition, HTML is no longer SGML-based and has its own parsing rules.
Learn more
- SGML on Wikipedia
- Introduction to SGML