Re: Preserving the base URI through a p:xslt transformation

Thanks for the detailed response. I tried output-base-uri now, but
unfortunately it didn't help:

<p:with-option name="output-base-uri" select="base-uri(/*)"/>

Yes, I am indeed using calabash version 1.0.8.94 (in oXygen 14.2).

So a workaround for now can be something like this:

    <p:group>
        <p:variable name="base" select="base-uri(/*)"/>
        <p:xslt>
            ...
        </p:xslt>
        <p:choose>
            <p:when test="/*[@xml:base]">
                <p:identity/>
            </p:when>
            <p:otherwise>
                <p:add-attribute match="/*" attribute-name="xml:base">
                    <p:with-option name="attribute-value" select="$base"/>
                </p:add-attribute>
                <p:delete match="/*/@xml:base"/>
            </p:otherwise>
        </p:choose>
    </p:group>

Thanks!
Jostein


On 22 March 2013 11:28, James Fuller <jim@webcomposite.com> wrote:

> On Fri, Mar 22, 2013 at 10:50 AM, Jostein Austvik Jacobsen
> <josteinaj@gmail.com> wrote:
> > So this pipeline:
> >
> > <?xml version="1.0" encoding="UTF-8"?>
> > <p:declare-step xmlns:p="http://www.w3.org/ns/xproc" version="1.0">
> >     <p:input port="source">
> >         <p:inline>
> >             <doc xml:base="file:/tmp/"/>
> >        </p:inline>
> >     </p:input>
> >     <p:output port="result"/>
> >     <p:delete match="/*/@xml:base"/>
> >     <p:add-attribute match="/*" attribute-name="base-before">
> >         <p:with-option name="attribute-value" select="base-uri(/*)"/>
> >     </p:add-attribute>
> >     <p:xslt>
> >         <p:input port="parameters">
> >             <p:empty/>
> >         </p:input>
> >         <p:input port="stylesheet">
> >             <p:inline>
> >                 <xsl:stylesheet
> > xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="2.0">
> >                     <xsl:template match="/">
> >                         <xsl:copy-of select="/"/>
> >                     </xsl:template>
> >                 </xsl:stylesheet>
> >             </p:inline>
> >         </p:input>
> >     </p:xslt>
> >     <p:add-attribute match="/*" attribute-name="base-after">
> >         <p:with-option name="attribute-value" select="base-uri(/*)"/>
> >     </p:add-attribute>
> > </p:declare-step>
> >
> > Gives me this on the output port:
> >
> > <doc base-after="file:/home/jostein/preserve-base-test.xpl"
> > base-before="file:/tmp/"/>
> >
> > I would like to get this:
> >
> > <doc base-after="file:/tmp/" base-before="file:/tmp/"/>
> >
> > How can I make an XSLT transformation preserve the base URI of the
> document
> > without using the xml:base attribute?
>
> note that p:xslt has a output-base-uri option
>
> verbatim from the spec
>
> 'The output-base-uri option sets the context's output base URI per the
> XSLT 2.0 specification, otherwise the base URI of the result document
> is the base URI of the first document in the source port's sequence.
> If the value of the output-base-uri option is not absolute, it will be
> resolved using the base URI of its p:option element. An XSLT 1.0 step
> should use the value of the output-base-uri as the base URI of its
> output, if the option is specified.'
>
> so you first set the base uri explicitly,
> then you delete the attribute
> then you dowse it back,
> finally pushing it through xslt meat grinder….
>
> the statement from the spec
>
> 'otherwise the base URI of the result document is the base URI of the
> first document in the source port's sequence'
>
> when you delete the attribute, this does not affect base-uri (because
> delete attribute is not deleting its actual base-uri) … I think the
> problem is that the p:xslt step then goes and implies a base-uri on
> its own and its probably a bug but (assuming you are using calabash)
> will let impl comment further.
>
> if it helps, I think your expectation is valid and your example a good
> candidate for a new unit test which I will try to fold into the w3c
> xproc unit test suite.
>
> hth, Jim Fuller
>