I see, thanks Gerrit and Christian for the insight. This *does* sound wickedly
unfunny.
OK if I actually do not need to be able to parse the DTD wouldn't the simple
workaround be:
fetch:xml('file:///C:/temp/catalog/dokument.xml')
=> xslt:transform('transform.xsl')
At least this is what works here, resulting in a new document node and trashing
the DTD declaration.
Daniel
-----Ursprüngliche Nachricht-----
Von: BaseX-Talk <basex-talk-boun...@mailman.uni-konstanz.de> Im Auftrag von
Imsieke, Gerrit, le-tex
Gesendet: Donnerstag, 2. Juni 2022 16:40
An: basex-talk@mailman.uni-konstanz.de
Betreff: Re: [basex-talk] XML Catalog and xslt:transform()
As a workaround, you might be able to read the documents using doc() in XQuery
(this might work with the help of the catalog, in contrast to
doc() from within XSLT/Saxon) and pass them to xslt:transform() in some way.
“Some way” isn’t easy, either, since xslt:transform() still relies on JAXP, and
you can’t pass arbitrary XDM items such as whole documents or maps as
stylesheet parameters (or can you? $params as map(*)? doesn’t rule this out,
but I doubt that a parameter may have another map as value and arrive safely at
the stylesheet). So you might need to wrap all inputs in a single top-level
element, which of course prevents you from letting the XSLT stylesheet decide
which resource to load dynamically, and you might need to change matching
patterns.
But switching to XDM and implementing XPath 3.1’s fn:transform() function that
would allow to was too much of a stretch for Christian at the time we paid
BaseX GmbH to implement xslt:transform-report(). I think this will need another
significant investment, and Christian needs to find time to implement it.
Gerrit
On 02.06.2022 16:24, Imsieke, Gerrit, le-tex wrote:
> Hi Daniel,
>
> I think the catalog in xslt:transform() is only used for XSLT
> imports/includes and maybe for reading documents with doc(), and only
> for Saxon. The catalog is probably *not* used for mapping system
> identifiers in the documents accessed this way. We should document
> this better once we find out what is/isn’t supported.
>
> The background is that we desperately needed to use catalogs for
> mapping import/include URIs, and we paid Liam to implement this. He
> succeeded with a little help from Christian, but it was not an easy
> feat because include/import URI resolution is different from doc() URI
> resolution in Saxon which in turn is different from system identifier
> resolution (that is probably done by the XML parser, not by Saxon).
>
> So I think we need to pay Liam and Christian again so that they work
> out how to pass the catalog to the XML parser that is invoked by
> Saxon. This definitely isn’t a fun task.
>
> Gerrit
>
> On 02.06.2022 14:44, Zimmel, Daniel wrote:
>> Hi,
>>
>> after reading https://docs.basex.org/wiki/Catalog_Resolver and
>> digging in the list archives
>> (https://mailman.uni-konstanz.de/pipermail/basex-talk/2019-March/0141
>> 99.html
>> ) I still have trouble understanding catalog files.
>>
>> Is this supposed to work with xslt:transform() and BaseX GUI 9.7.2?
>> The default option (DTD = false) is ignored by xslt:transform()
>> because the function is definitely requesting the external DTD.
>> This prevents transforming XML with DTD declarations that are not
>> available (if I understand correctly, a problem that the DTD option
>> is trying to solve in general).
>>
>> When I try to solve this via catalog files (actually I do not need
>> the DTD), I do not have success.
>> Here are my mini examples:
>>
>> Saxon HE 10.3 resides in the lib folder
>>
>> .basex setting:
>> # Local Options
>> SERIALIZER = indent=no
>> DTD = true
>>
>> XML in local folder "C:/temp/catalog":
>> <!DOCTYPE dokument
>> SYSTEM "http://www.blahblahblah.info/dtd/dokument.dtd";>
>> <dokument>
>> <doknr>01</doknr>
>> </dokument>
>>
>> catalog.xml in local folder "C:/temp/catalog":
>> <catalog prefer="system"
>> xmlns="urn:oasis:names:tc:entity:xmlns:xml:catalog">
>> <rewriteSystem
>> systemIdStartString="http://www.blahblahblah.info/dtd/";
>> rewritePrefix="file:///C:/temp/catalog/dtd/"/>
>> </catalog>
>>
>> dokument.dtd in local folder "C:/temp/catalog/dtd":
>> <!ELEMENT dokument (doknr)>
>> <!ELEMENT doknr (#PCDATA)>
>>
>> XQuery query.xq in local folder "C:/temp/catalog":
>> (# db:catfile catalog.xml #) {
>> xslt:transform('dokument.xml', 'transform.xsl') }
>>
>>
>> With or without pragma, this always results in a
>> java.net.UnknownHostException (because the system ID is not available,
>> that's true), but I would be expecting this would resolve to
>> "file:///C:/temp/catalog/dtd/dokument.dtd"
>>
>> Not working in GUI nor via CCL.
>>
>> What am I getting wrong?
>>
>> Thanks, Daniel
>>
>
--
Gerrit Imsieke
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