is a collection of instructions how to indent and mark the various components of a text (like heading, enumerations, breaks etc.). If the rules of Structured Text are observed, the computer is able to make HTML code of the written text.
Structured text is one of the 5 languages supported by the IEC 61131-3 standard. It is designed for programmable logic controllers (PLCs). It is a high level language that is block structured and resembles PASCAL.