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Posted to dev@cocoon.apache.org by Lars Huttar <la...@sil.org> on 2006/12/19 18:32:11 UTC
DTD validation: "Unsupported grammar language"
Hello,
I seconded this question on the Cocoon user list but have not received a
response, so would like to ask the developers.
In Cocoon 2.1.9, we are trying to use ValidationReportTransformer to
validate our XML against a DTD. I'm looking at the documentation at
http://cocoon.zones.apache.org/daisy/documentation/864/validation.html
and
http://cocoon.zones.apache.org/daisy/documentation/components/1058/g2/691.html.
The validation sample block has examples for validating against RNG and
XML Schema, but not against a DTD.
Like José quoted below, I'm trying to figure out how to make it work.
Here's my attempt, a copy-and-modify of a match pattern in
samples\blocks\validation\sitemap.xmap:
<map:match pattern="report-dtd-valid">
<map:generate src="source-ok.xml"/>
<map:transform type="validation-report" src="schema-ok.dtd">
<map:parameter name="grammar"
value="http://www.w3.org/TR/REC-xml" />
</map:transform>
<map:transform src="context:/stylesheets/system/xml2html.xslt"/>
<map:serialize/>
</map:match>
I added the "grammar" parameter, as instructed by the documentation
referenced above, to the validation-report transformer.
For grammar identifier, the documentation seemed to indicate I should
use "http://www.w3.org/TR/REC-xml". (I also tried "dtd" just for kicks.)
But the result is that I get the error
org.apache.cocoon.components.validation.ValidatorException:
Unsupported grammar languagehttp://www.w3.org/TR/REC-xml
Does this mean there is no support for validating against DTDs? Or am I
doing something wrong?
Thanks,
Lars
On 10/20/2006 9:34 AM, José Miguel Vieira wrote:
> Hello,
>
> I'm trying to use the validation report features, using a dtd for the
> validation.
>
> What is the correct grammar value for dtd validation? I'm
> using http://www.w3.org/TR/REC-xml but it returns an "Unsupported
> grammar language".
>
> Thanks,
> Miguel Vieira
I have the same need and am running into the same dead end. Does anyone
have an answer?
Do we need to add something to cocoon.xconf?
Thanks,
Lars
Re: DTD validation: "Unsupported grammar language"
Posted by Lars Huttar <la...@sil.org>.
On 12/20/2006 6:09 PM, Joerg Heinicke wrote:
> Hello Lars,
>
> just from having a look at the code:
> 1. It's http://www.w3.org/TR/REC-xml (see Validator interface and its
> declared constants).
That documentation is where I got the string from. Glad for the
confirmation that it's right.
> 2. This exception is thrown in
> AbstractValidator.getValidationHandler() in line 327 in the current
> code. It is thrown when no SchemaParser can be found.
> 3. Grammars and their parsers seem to be configured via
> Configurable.configure(). So maybe the javadoc for this method [1] is
> helpful. Otherwise you might need to have a look into the code of this
> method or do some debugging.
Thanks...
It's a little disappointing when Cocoon bills itself as a web
development framework that "makes it possible to use a Lego(tm)-like
approach in building web solutions, hooking together components into
pipelines *without any required programming*", "with strong foundations
in *XML-based* server-side web application frameworks,"[1] that users
have to go dig through the framework source code in order to find out
whether DTD validation is even possible out of the box.
I looked at the javadoc you mentioned. It seems to suggest that I do
what I've already done, namely to specify the grammar using
<map:parameter name="grammar" value="http://www.w3.org/TR/REC-xml" />. I
confess I don't really understand the stuff about schema factories and
parsers.
Two other Cocoon users have requested the same thing on the Cocoon user
list, with no response. I'm sure it would be appreciated if someone
could figure this out... even if the answer is "no, it's not currently
supported".
Right now, we're using the third-party
fcc.ima.cocoon.ValidatorTransformer with Cocoon 2.1.7. However, it
always reports validation errors as being in line 1 column 1, which is
not very helpful in finding the error. Apparently this is because the
generator provides a Locator interface that supplies meaningless
location info. I was hoping the built-in validation block in Cocoon
2.1.8+ would do better.
Thanks,
Lars
[1] http://cocoon.apache.org/
>
> Regards
> Jörg
>
> [1]
> http://cocoon.apache.org/2.1/apidocs/org/apache/cocoon/components/validation/jaxp/JaxpSchemaParser.html#configure(org.apache.avalon.framework.configuration.Configuration)
>
>
> On 19.12.2006 18:32, Lars Huttar wrote:
>> Hello,
>> I seconded this question on the Cocoon user list but have not
>> received a response, so would like to ask the developers.
>> In Cocoon 2.1.9, we are trying to use ValidationReportTransformer to
>> validate our XML against a DTD. I'm looking at the documentation at
>> http://cocoon.zones.apache.org/daisy/documentation/864/validation.html
>> and
>> http://cocoon.zones.apache.org/daisy/documentation/components/1058/g2/691.html.
>>
>> The validation sample block has examples for validating against RNG
>> and XML Schema, but not against a DTD.
>> Like José quoted below, I'm trying to figure out how to make it work.
>> Here's my attempt, a copy-and-modify of a match pattern in
>> samples\blocks\validation\sitemap.xmap:
>> <map:match pattern="report-dtd-valid">
>> <map:generate src="source-ok.xml"/>
>> <map:transform type="validation-report" src="schema-ok.dtd">
>> <map:parameter name="grammar"
>> value="http://www.w3.org/TR/REC-xml" />
>> </map:transform>
>> <map:transform src="context:/stylesheets/system/xml2html.xslt"/>
>> <map:serialize/>
>> </map:match>
>>
>> I added the "grammar" parameter, as instructed by the documentation
>> referenced above, to the validation-report transformer.
>> For grammar identifier, the documentation seemed to indicate I should
>> use "http://www.w3.org/TR/REC-xml". (I also tried "dtd" just for kicks.)
>> But the result is that I get the error
>> org.apache.cocoon.components.validation.ValidatorException:
>> Unsupported grammar languagehttp://www.w3.org/TR/REC-xml
>>
>> Does this mean there is no support for validating against DTDs? Or am
>> I doing something wrong?
>>
>> Thanks,
>> Lars
>
Re: DTD validation: "Unsupported grammar language"
Posted by Joerg Heinicke <jo...@gmx.de>.
Hello Lars,
just from having a look at the code:
1. It's http://www.w3.org/TR/REC-xml (see Validator interface and its
declared constants).
2. This exception is thrown in AbstractValidator.getValidationHandler()
in line 327 in the current code. It is thrown when no SchemaParser can
be found.
3. Grammars and their parsers seem to be configured via
Configurable.configure(). So maybe the javadoc for this method [1] is
helpful. Otherwise you might need to have a look into the code of this
method or do some debugging.
Regards
Jörg
[1]
http://cocoon.apache.org/2.1/apidocs/org/apache/cocoon/components/validation/jaxp/JaxpSchemaParser.html#configure(org.apache.avalon.framework.configuration.Configuration)
On 19.12.2006 18:32, Lars Huttar wrote:
> Hello,
> I seconded this question on the Cocoon user list but have not received a
> response, so would like to ask the developers.
> In Cocoon 2.1.9, we are trying to use ValidationReportTransformer to
> validate our XML against a DTD. I'm looking at the documentation at
> http://cocoon.zones.apache.org/daisy/documentation/864/validation.html
> and
> http://cocoon.zones.apache.org/daisy/documentation/components/1058/g2/691.html.
>
> The validation sample block has examples for validating against RNG and
> XML Schema, but not against a DTD.
> Like José quoted below, I'm trying to figure out how to make it work.
> Here's my attempt, a copy-and-modify of a match pattern in
> samples\blocks\validation\sitemap.xmap:
> <map:match pattern="report-dtd-valid">
> <map:generate src="source-ok.xml"/>
> <map:transform type="validation-report" src="schema-ok.dtd">
> <map:parameter name="grammar"
> value="http://www.w3.org/TR/REC-xml" />
> </map:transform>
> <map:transform src="context:/stylesheets/system/xml2html.xslt"/>
> <map:serialize/>
> </map:match>
>
> I added the "grammar" parameter, as instructed by the documentation
> referenced above, to the validation-report transformer.
> For grammar identifier, the documentation seemed to indicate I should
> use "http://www.w3.org/TR/REC-xml". (I also tried "dtd" just for kicks.)
> But the result is that I get the error
> org.apache.cocoon.components.validation.ValidatorException:
> Unsupported grammar languagehttp://www.w3.org/TR/REC-xml
>
> Does this mean there is no support for validating against DTDs? Or am I
> doing something wrong?
>
> Thanks,
> Lars