On 04.02.2021 09:25, Martin Honnen martin(_dot_)honnen(_at_)gmx(_dot_)de wrote:
On 04.02.2021 09:07, Christophe Marchand cmarchand(_at_)oxiane(_dot_)com wrote:
Hello !
Reading the recommandation, I was not able to imagine a use-case for
Function Call Invocation
<https://www.w3.org/TR/xslt-30/#invoking-initial-function>[1].
Recommandation only speeks of raw result, and 2.3.5 section does not
mention a "starting environment".
Saxon implementation does not provide a command-line way to start a
XSL with a function call invocation ; there is only an API method to
do so. And in this case, a XDM value is return.
Could W3C Xslt group members explain the motivation of such a
starting way ?
Does someone has a real use-case of this invocation ?
Best regards,
Christophe
[1] : https://www.w3.org/TR/xslt-30/#invoking-initial-function
If you have a module/a function library you can use a function of it
with e.g.
let $xslt := <xsl:package
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"; version="3.0">
<xsl:import
href="http://www.xsltfunctions.com/xsl/functx-1.0.1-nodoc.xsl"/>
<xsl:expose component="function" names="*" visibility="public"/>
</xsl:package>
return
transform(
map {
'stylesheet-node' : $xslt,
'initial-function' : QName('http://www.functx.com',
'repeat-string'),
'function-params' : ['x', 5]
}
)?output
The XQuery part to first construct an XSLT 3 package importing the
XSLT 2 functx library is only necessary as the XSLT 2 functions are
otherwise not public. If you had an XSLT 3 version of functx with
public functions you would just use the module with e.g. the transform
function.
So the general use case is being able to call public functions from XSLT
3 modules or packages directly from environments like XPath 3.1, XQuery
3.1 or XSLT 3, another shorter example would be to call the csv:parse
function in the package example of the XSLT 3 spec from pure XPath 3.1
transform(
map {
'stylesheet-location' :
'https://github.com/w3c/xslt30-test/raw/master/tests/decl/package/package-100.xsl',
'initial-function' : QName('http://example.com/csv', 'parse'),
'function-params' : [data]
}
)?output
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