Re: [xml-dev] XML schema : refer problem

[Geert Delanote <geert.delanote@gmail.com>]

Tnx. I need to study (assertions in) xml schema 1.1 ;)
Does the assertion below state that every question of the poll must be answered?

How do I change
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema";
elementFormDefault="qualified" version="1.0" >
so that it refers to xsd 1.1?
Does XMLSpy support xsd 1.1?
Do parsers validate against xsd 1.1?

Google couldn't answer me (or I asked it the wrong questions ;))...


On Wed, Apr 22, 2009 at 3:57 PM, Michael Kay <mike@saxonica.com> wrote:
>
> Easy enough in XSD 1.1 (*)
>
> On organisationType, define
>
> xs:assert test="every $pp in ./person/poll satisfies
>                 some $p in ./poll satisfies
>                    ($pp/@id = $p/@id
>                      and every $a in $pp/answer satisfies $a/@id =
> $p/question/@id)"
>
> (*) Also easy to get it wrong - no guarantees offered!
>
> Michael Kay
> http://www.saxonica.com/
>
>> -----Original Message-----
>> From: Geert Delanote [mailto:geert.delanote@gmail.com]
>> Sent: 22 April 2009 14:13
>> To: xml-dev@lists.xml.org
>> Subject: [xml-dev] XML schema : refer problem
>>
>> Suppose I have the following document :
>> <?xml version="1.0" encoding="UTF-8"?>
>> <organisation>
>>       <person id="1">
>>               <poll id="a">
>>                       <answer id="1"/>
>>                       <answer id="3"/>
>>               </poll>
>>       </person>
>>
>>       <poll id="a">
>>               <question id="1"/>
>>               <question id="2"/>
>>       </poll>
>>       <poll id="b">
>>               <question id="1"/>
>>               <question id="3"/>
>>       </poll>
>> </organisation>
>>
>> In my schema definition i want the following constraints :
>> - a poll has a unique id within an organisation : key on id
>> in organisation scope : No Problem
>> - a question has a unique id within a poll : key on id in poll scope :
>> No Problem
>> - a person can only answer a defined poll : keyref to the key of poll
>> : No problem
>> - a person can only answer questions of the referenced poll : ...
>> problem ... How do I do that? The combination poll-id
>> question-id is unique but I can't define a key on that
>> combination which I need to refer to.
>>
>> Extra question : how can I ensure that the person answers
>> every question?
>> The question element contains lots of information that I
>> don't want to duplicate...
>>
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>
>