因为移动设备的内存和处理能力都有限，制造商们发明了一种类似XML的二进制元语言，称为Wireless Binary XML (WBXML，无线二进制xml)。
Because mobile devices have limited memory and processing capacity, their manufacturers created an XML-like binary meta language called Wireless binary XML (WBXML).
一门编程语言同时也是自身的元语言的能力称之为反射或者自反。
The ability of a programming language to be its own metalanguage is called reflection or reflexivity.
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