Package xuriella

Using XSLT
Compiling stylesheets explicitly
Profiling support
Defining extension elements
Functions useful in extensions

Using XSLT

XSLT stylesheets are invoked using the apply-stylesheet function, which can parse, compile, and apply XSLT stylesheets.

Top-level parameters to the stylesheet can be specified using parameter instances created by make-parameter.

Compiling stylesheets explicitly

parse-stylesheet allows the compilation of XSLT stylesheets into objects ahead of time, so that apply-stylesheet only needs to invoke the pre-compiled sheet rather than having to parse and compile it first.

Profiling support

The profiling facility records the run time of XSLT templates.

Defining extension elements

Xuriella can be extended in two ways:

Custom XPath functions can be implemented using the extension mechanism in Plexippus.

Custom XSLT elements can be implemented using the following macros.

define-extension-group is used to establish a namespace for the extensions, which can then be activated using a namespace declaration and the extension-element-prefixes attribute in the stylesheet.

Every individual extension element needs at least a definition using define-extension-parser. The parser will run at compilation time and return an XSLT instruction in a sexp syntax. If the extension can be implemented as a transformation into ordinary XSLT elements, the parser only needs to return that XSLT sexp.

In addition, the sexp representation itself can be extended using define-extension-compiler. The extension compiler will be invoked while the stylesheet is compiled to return a function, usually a closure, that will be called by the stylesheet at run-time.

Functions useful in extensions

The following functions can be used by extension parsers and compilers, to parse child nodes as instructions, or to compile such instructions, respectively.