XSL Transformations (XSLT) Version 3.0 [Comments by 31 March 2016]

XSL Transformations (XSLT) Version 3.0


This specification defines the syntax and semantics of XSLT 3.0, a language designed primarily for transforming XML documents into other XML documents.

XSLT 3.0 is a revised version of the XSLT 2.0 Recommendation [XSLT 2.0] published on 23 January 2007.

The primary purpose of the changes in this version of the language is to enable transformations to be performed in streaming mode, where neither the source document nor the result document is ever held in memory in its entirety. Another important aim is to improve the modularity of large stylesheets, allowing stylesheets to be developed from independently-developed components with a high level of software engineering robustness.

XSLT 3.0 is designed to be used in conjunction with XPath 3.0, which is defined in [XPath 3.0]. XSLT shares the same data model as XPath 3.0, which is defined in [XDM 3.0], and it uses the library of functions and operators defined in [Functions and Operators 3.0]. XPath 3.0 and the underlying function library introduce a number of enhancements, for example the availability of higher-order functions.

As an implementer option, XSLT 3.0 can also be used with XPath 3.1. All XSLT 3.0 processors provide maps, an addition to the data model which is specified (identically) in both XSLT 3.0 and XPath 3.1. Other features from XPath 3.1, such as arrays, and new functions such as random-number-generatorFO31 and sortFO31, are available in XSLT 3.0 stylesheets only if the implementer chooses to support XPath 3.1.

Some of the functions that were previously defined in the XSLT 2.0 specification, such as the format-dateFO30 and format-numberFO30 functions, are now defined in the standard function library to make them available to other host languages.

XSLT 3.0 also includes optional facilities to serialize the results of a transformation, by means of an interface to the serialization component described in [XSLT and XQuery Serialization]. Again, the new serialization capabilities of [XSLT and XQuery Serialization 3.1] are available at the implementer’s option.

This document contains hyperlinks to specific sections or definitions within other documents in this family of specifications. These links are indicated visually by a superscript identifying the target specification: for example XP30 for XPath 3.0, DM30 for the XDM data model version 3.0, FO30 for Functions and Operators version 3.0.

Comments are due by 31 March 2016.

That may sound like a long time for comments but it is shorter than you might think.

It is a long document and standards are never an “easy” read.

Fortunately it is cold weather or about to be in many parts of the world with holidays rapidly approaching. Some extra time to curl up with XSL Transformations (XSLT) Version 3.0 and its related documents for a slow read.

Something I have never done before that I plan to attempt with this draft is running the test cases, almost 11,000 of them. I’m not an implementer but being more familiar with the test cases will my understanding of new features in XSL 3.0.

Comment early and often!


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