Sgml

Standard Generalized Markup Language (SGML) is a meta-markup language used to define the structure and format of markup languages, enabling the creation of customized markup languages for various industries and applications. As a precursor to HTML and XML, SGML has played a significant role in shaping the development of web technologies and remains relevant in industries that require complex document management and publishing, such as aerospace, defense, and technical publishing, where its flexibility and customization capabilities continue to provide value.