Usually referred to as XML. This is a form of language which is used to define other languages. For example, someone wanting to define a language that describes graphics in a novel way might use XML to define the elements of the language.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。