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Hi Folks,
If XSD is not a programming language then what is it?
People have said that XSD is:
- a declarative language
- descriptive markup
I think that a programming language is a syntax for solving problems (where the syntax is such that it can be processed by a computer).
XSD is a syntax for solving certain problems. Specifically, XSD is for solving constraint problems, i.e.,
Is the input ____ constrained in this ____ way?
A computer can evaluate an input document against an XSD document and produce an answer to the question, i.e., using the XSD language the problem can be solved.
I understand that the set of problems that can be solved using XSD are very specific.
People have said that a programming language is one that can solve many different kinds of problems. Certainly, then, XSD is not a programming language.
Both XSD and programming languages are languages for solving problems. So, if I were to draw a Venn diagram I would draw a:
- bubble for XSD
- bubble for programming languages (independent of the XSD bubble)
- put both of the bubbles inside a big bubble
What would you label the big bubble?
Here's a graphic to illustrate my question:
http://www.xfront.com/XML-Declarative-Programming/XSD-and-programming-languages-are-a-type-of-what.gif
/Roger
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