> TeX was developed as a subset of SGML or if you wish clone, variant, etc.
> TeX is a declarative and procedural programming language. What is more
> important it is dynamic! That is it is possible to change the
> definitions
>of the
> macros used while the program is running. Thereby giving you the ability
>to change
> the semantics of the command itself as well as the semantics of the
>document structure!
TeX as a programming language is a derivative of LISP and in this sense it is
declarative,
though not functional. Now, a language that is procedural is (almost?) an
imperative
programming language and frankly I don't understand how an imperative language
can be
declarative at the same time. Also, informally speaking, when one says a
language is dynamic
or static, he/she refers to the type system of the language.
A.S.
----------------------
Apostolos Syropoulos
Xanthi, Greece
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