[xsl] [ANN] XSLT 3.0 and Saxon 9.8

Subject: [xsl] [ANN] XSLT 3.0 and Saxon 9.8
From: "Michael Kay mike@xxxxxxxxxxxx" <xsl-list-service@xxxxxxxxxxxxxxxxxxxxxx>
Date: Thu, 8 Jun 2017 17:26:44 -0000
XSLT 3.0 becomes a Recommendation today!

We kept you waiting for ten years, but it has finally happened.

A reminder of some of the key features:

* Streaming

* Separately compiled packages

* Higher-order functions

* JSON, maps, and arrays

and of course lots of goodies like trigonometric functions, dynamic XPath
evaluation, a string concatenation operator, text value templates, a random
number generator, and a function chaining operator.

As a bonus, we thought you'd like an open-source implementation.

So Saxon 9.8 is released today, and the open source Saxon-HE version now
includes core support for XSLT 3.0 with XPath 3.1.

There are lots of other new things in Saxon 9.8:

* just-in-time compilation to reduce the cost of loading vast stylesheets like
DocBook and DITA when you're only using a fraction of the template rules

* hot-spot bytecode generation, again to put the compilation effort where it's

* optimization of template rule sets like those found in DITA where the
matching is all on attribute values rather than element names

* a new approach to processing of DOM trees, which are now only twice as slow
as Saxon's native TinyTree compared with 5-10 times slower the old way

* some experimental syntax enhancements to enrich the type system: tuple
types, union types, and type aliases

* bytecode generation for validation of user-defined simple types in XSD

At the same time as moving foward to XSLT 3.0, we're dropping support for
older versions of the specs, so you can no longer run in XQuery 1.0 or XSLT
2.0 mode, for example - your code should continue to work, because the specs
have a high level of backwards compatibility. A particular decision that will
affect some of you is that we're dropping XSLT 1.0 backwards compatibility
mode from Saxon-HE, and hope to eliminate it entirely in due course.

Saxon-HE is available at http://saxon.sf.net/

Saxon-PE and -EE are at http://www.saxonica.com - follow the links to
products, downloads, and documentation.

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