A Worldwide Web Consortium (W3C) recommendation, XML Schema soon gained quite a bit of popularity as an Extensible Markup Language (XML) Schema language. Coupled with the Xs3P style sheet, for example, the schema has become a highly understandable way to communicate XML processes for humans (developers), akin to high-level scripting languages of the past. This, of course, is only an added benefit of the nature of this recommended schema. The original objective was validation and standardization, something achieved quite effectively as a result not only of the generally useful nature of the schema but also the great support it received and a name who’s ambiguity allows easy neglecting of other schema for XML. Material produced using this schema takes the suffix of (.xsd), differentiating it from several other schema which may not invalidate material with different suffixes.
A schema as powerful and extensive as the XML Schema however could not have been designed arbitrarily on the spot. Rather, documentation humbly accepts how much the schema owes to previous efforts that fell short of the success it reached. For example, there was a significant influence on the schema from such predecessors as SOX, XDR, and XML-data. In designing the present schema, the best features of previous schema were integrated while the pitfalls associated with them were ignored, leading to a final product of greater comparable efficiency and use.
In spite of this popularity which doesn’t seem on the verge of ebbing or abating any time in the near future, the schema isn’t without it’s naysayers and criticisms. For example, XML Schema lacks an ordered set of datatypes, giving users rather non-intuitive material with which to work. On top of which, though the schema does present human readable code, this isn’t done without a significant deal of difficulty. Some of the most well-cited critics of the recommended schema have proposed a number of alternatives which resolve these issues, such as RELAX NG. Only time will tell whether the XML Schema can maintain predominance, however, present forecasts are for clear sailing ahead for this schema – leading even more developers to make this choice.