Tex, which stands for Text Executive Processor, is a programming language, whose invention dates back to 1979. Being created by Honeywell Information Systems, it was considered as a first generation scripting language. With regard to operators, Tex has three different types, such as arithmetic, boolean and string. As regards the former, Tex only supports basic arithmetic operations; addition, subtraction or division to name but a few ones, with up to 16 levels of parenthesis. With reference to the second, boolean operators come in two flavors for both, numeric and string comparisons. As regards the latter, string concatenation in Tex was provided by the comma operator.
Scribe is at the same time a mark up language and a word processing system, that completely revolutionised the use of descriptive markup when it was created by Brian Reid as part of his doctoral dissertation in the 1980s. It was later sold to the company Unilogic.
The Generalized Markup Language, commonly known as GML, makes the description of a document easier if we talk about its format, organization structure or contents parts and their relationship. Due to the system of specifying heading levels, this programme classifies the parts of the documents in terms of importance. Just by selecting a profile, documents can be formated for different devices which go from screens to either, laser or line printers.
References:
- Text Executive Programming Language. (2009, July 31). In Wikipedia, The Free Encyclopedia. Retrieved 12:50, November 8, 2009, from http://en.wikipedia.org/w/index.php?title=Text_Executive_Programming_Language&oldid=305276963
- Scribe (markup language). (2009, February 25). In Wikipedia, The Free Encyclopedia. Retrieved 12:56, November 8, 2009, from http://en.wikipedia.org/w/index.php?title=Scribe_(markup_language)&oldid=273246031
- IBM Generalized Markup Language. (2009, August 17). In Wikipedia, The Free Encyclopedia. Retrieved 12:58, November 8, 2009, from http://en.wikipedia.org/w/index.php?title=IBM_Generalized_Markup_Language&oldid=308444663
