[DDI-SRG] schema for DDI 3.1
A. Gregory
arofan.gregory at earthlink.net
Wed Jul 8 11:56:10 EDT 2009
J:
Agreed. This is exactly what I've found running a few tests here.
Cheers,
Arofan
-----Original Message-----
From: ddi-srg-bounces at icpsr.umich.edu
[mailto:ddi-srg-bounces at icpsr.umich.edu] On Behalf Of J Gager
Sent: Wednesday, July 08, 2009 7:41 AM
To: 'A. Gregory'; 'Wendy Thomas'
Cc: 'TIC list'; 'Sanda Ionescu'; 'Mary Vardigan'
Subject: Re: [DDI-SRG] schema for DDI 3.1
This is the rub when creating standard schemas - you want them to work in as
many tools as possible, but different tools implement the specification
differently. There are always compromises to be made. Although something may
technically be correct, we should be as lenient as possible as to how we
interpret the spec.
I have yet to come across a tool that requires that the xml namespace prefix
be declared. I have found plenty that want the schema imported, but none
that require you to declare that namespace. As Wendy pointed out, this was
new in the 3.1 instance.xsd. Since we have yet to find tools that require it
(including while 3.0 was being used) but have found tools that don't like it
- we should remove it.
J
-----Original Message-----
From: ddi-srg-bounces at icpsr.umich.edu
[mailto:ddi-srg-bounces at icpsr.umich.edu] On Behalf Of A. Gregory
Sent: Wednesday, July 08, 2009 9:43 AM
To: 'A. Gregory'; 'Wendy Thomas'
Cc: 'TIC list'; 'Sanda Ionescu'; 'Mary Vardigan'
Subject: Re: [DDI-SRG] schema for DDI 3.1
Oops - I lie. It wants the xml namespace imported, but it doesn't care
whether you have the xmlns attribute or not.
Cheers,
Arofan
-----Original Message-----
From: ddi-srg-bounces at icpsr.umich.edu
[mailto:ddi-srg-bounces at icpsr.umich.edu] On Behalf Of A. Gregory
Sent: Wednesday, July 08, 2009 5:42 AM
To: 'Wendy Thomas'
Cc: 'TIC list'; 'Sanda Ionescu'; 'Mary Vardigan'
Subject: Re: [DDI-SRG] schema for DDI 3.1
Wendy:
Oxygen is the same as Stylus.
Can somebody check it with Spy?
Cheers,
Arofan
-----Original Message-----
From: Wendy Thomas [mailto:wlt at pop.umn.edu]
Sent: Wednesday, July 08, 2009 5:37 AM
To: A. Gregory
Cc: 'Joachim Wackerow'; 'Pascal Heus'; 'TIC list'; 'Sanda Ionescu'; 'Mary
Vardigan'
Subject: RE: [DDI-SRG] schema for DDI 3.1
As noted earlier this was not in any 3.0 version. Further testing in
Stylus Studio shows 3.1 instance.xsd valid both with and without the line.
Also xml:lang is valid with or without this declaration.
I'm just testing things here. I leave it up to you to determine what is
correct.
Wendy
On Wed, 8 Jul 2009, A. Gregory wrote:
> Folks:
>
> Here's what I don't understand. Presumably, XMetal didn't choke on the
> existing, published 3.0 schemas which bind the xml namespace (see, for
> example, the reusable schema module.) Why, then, now, does it suddenly
> choke?
>
> Sanda: did you use XMetal for the 3.0 version of DDI?
>
> Cheers,
>
> Arofan
>
> -----Original Message-----
> From: Joachim Wackerow [mailto:joachim.wackerow at gesis.org]
> Sent: Wednesday, July 08, 2009 12:59 AM
> To: A. Gregory
> Cc: 'Pascal Heus'; 'Wendy Thomas'; 'TIC list'; 'Sanda Ionescu'; 'Mary
> Vardigan'
> Subject: Re: [DDI-SRG] schema for DDI 3.1
>
> One the one hand hand DDI should follow the spec. On the other hand DDI
> should validate in major editors and parsers like XMetal (Sanda
> mentioned it).
>
> We should verify that DDI can be validated in major editors and parsers.
> When an issue raises just with one of them, we can take following action:
> - document the issue on the DDI web site
> - email the vendor about the issue (like I did with a previous version
> of XMLSpy).
>
> Achim
>
> A. Gregory wrote:
>> Pascal:
>>
>>
>>
>> It has always been there, in at least one of the schemas.
>>
>>
>>
>> I know this is a weird interpretation of the spec, but when I tested
>> this most parsers choked if it wasn't declared. Some tools like it, some
>> don't, but the majority do, from my tests.
>>
>>
>>
>> It is **not** illegal to explicitly declare the xml namespace binding,
>> so long as it is bound to the namespace stated.
>>
>>
>>
>> Cheers,
>>
>>
>>
>> Arofan
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>> *From:* Pascal Heus [mailto:pascal.heus at gmail.com]
>> *Sent:* Tuesday, July 07, 2009 8:55 AM
>> *To:* Wendy Thomas
>> *Cc:* A. Gregory; 'TIC list'; 'Sanda Ionescu'; 'Mary Vardigan'
>> *Subject:* Re: [DDI-SRG] schema for DDI 3.1
>>
>>
>>
>> more...
>>
>> Namespace Constraint: Prefix Declared
>> The namespace prefix, unless it is xml or xmlns, must have been declared
>> in a namespace declaration attribute in either the start-tag of the
>> element where the prefix is used or in an an ancestor element (i.e. an
>> element in whose content the prefixed markup occurs). The prefix xml is
>> by definition bound to the namespace name
>> http://www.w3.org/XML/1998/namespace. The prefix xmlns is used only for
>> namespace bindings and is not itself bound to any namespace name.
>>
>> *P
>>
>> Wendy Thomas wrote:
>>
>> Arofan,
>>
>>
>>
>> I was just checking to see why this came up now but not earlier. It seems
>>
>> that
>>
>> xmlns:xml="http://www.w3.org/XML/1998/namespace"
>>
>>
>>
>> was not in the first line (<xs:schema etc) in 3.0. It was simply the
>>
>> first import line. Is there a reason for this? Just curious :)
>>
>>
>>
>> Wendy
>>
>>
>>
>>
>>
>> On Tue, 7 Jul 2009, A. Gregory wrote:
>>
>>
>>
>>
>>
>>> Sanda:
>>>
>>>
>>>
>>> Usually this error is caused by tools which don't like the xml.xsd
> schema.
>>>
>>>
>>>
>>> Try removing any mention of this from the namespace declarations and
>>> imports, and see if that works.
>>>
>>>
>>>
>>> Cheers,
>>>
>>>
>>>
>>> Arofan
>>>
>>>
>>>
>>> _____
>>>
>>> From: ddi-srg-bounces at icpsr.umich.edu
> <mailto:ddi-srg-bounces at icpsr.umich.edu>
>>> [mailto:ddi-srg-bounces at icpsr.umich.edu] On Behalf Of Sanda Ionescu
>>> Sent: Tuesday, July 07, 2009 4:45 AM
>>> To: TIC list
>>> Cc: Mary Vardigan
>>> Subject: [DDI-SRG] schema for DDI 3.1
>>>
>>>
>>>
>>> Hi, all.
>>>
>>>
>>>
>>> I tried to create markup using the draft (?) for 3.1 and my editor would
> not
>>> load the (Instance) schema.
>>>
>>> Error:"Namespace prefix is not allowed to start with the reserved string
>>> xml" - line 22, column 639.
>>>
>>>
>>>
>>> Also, could you please let us know when you think 3.1 might actually be
>>> published?
>>>
>>> Sanda.
>>>
>>>
>>>
>>> Sanda Ionescu
>>> ICPSR
>>> University of Michigan
>>> P.O. Box 1248
>>> Ann Arbor, MI 48106
>>>
>>> Phone, Fax: 734-615-7890
>>>
>>>
>>>
>>
>>
>> Wendy L. Thomas Phone: +1 612.624.4389
>>
>> Data Access Core Director Fax: +1 612.626.8375
>>
>> Minnesota Population Center Email: wlt at pop.umn.edu
> <mailto:wlt at pop.umn.edu>
>>
>> University of Minnesota
>>
>> 50 Willey Hall
>>
>> 225 19th Avenue South
>>
>> Minneapolis, MN 55455
>>
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>>
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>>
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>>
>>
>>
>>
>>
>>
>>
>>
>> ------------------------------------------------------------------------
>>
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>
>
> --
> GESIS - Leibniz Institute for the Social Sciences
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>
Wendy L. Thomas Phone: +1 612.624.4389
Data Access Core Director Fax: +1 612.626.8375
Minnesota Population Center Email: wlt at pop.umn.edu
University of Minnesota
50 Willey Hall
225 19th Avenue South
Minneapolis, MN 55455
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