Subject: RE: [xsl] XSLT Processors in .NET and Schema-awareness From: "Michael Kay" <mike@xxxxxxxxxxxx> Date: Fri, 23 Sep 2005 17:34:53 +0100 |
> Begining from this last one, what exactly is "schema-awareness" when > one talk about XSLTprocessors, what purposes it serves? Schema awareness provides the following three features: * the stylesheet can import a schema and use the types defined in the schema in declarations of variables, functions, match patterns * source documents can be validated against a schema, and the types assigned to elements and attributes by the process of schema validation then determine the types of values manipulated by the stylesheet * result documents can be validated on the fly as they are constructed. The main benefit of schema-awareness is that the software becomes more robust, in the same way as Java is more robust than JavaScript. By introducing stronger type-checking, you find the errors in your code more quickly, with less need to generate exhaustive test cases (actually, no-one writes exhaustive test cases; but you know that you should). It also becomes possible to write code that is more generic and therefore more reusable: for example, a template rule to format all dates, regardless of the actual element or attribute name. The value of this increases as your schemas and applications grow in size and complexity. A potential extra benefit is improved performance, however, this depends on the optimizer of the particular processor. > > So my question are, what XSLT Processors exists that support XSL 2.0 > and XPath 2.0, and optionally that are "schema-aware", for the .NET > platform? There are currently two schema-aware XSLT 2.0 processors around: Saxon-SA and Altova. Both will run on a .NET platform in some form, but neither is native .NET code. Michael Kay http://www.saxonica.com/
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