[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: XML schema : refer problem
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@g...] > Sent: 22 April 2009 14:13 > To: xml-dev@l... > Subject: 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... > > ______________________________________________________________ > _________ > > XML-DEV is a publicly archived, unmoderated list hosted by > OASIS to support XML implementation and development. To > minimize spam in the archives, you must subscribe before posting. > > [Un]Subscribe/change address: http://www.oasis-open.org/mlmanage/ > Or unsubscribe: xml-dev-unsubscribe@l... > subscribe: xml-dev-subscribe@l... List archive: > http://lists.xml.org/archives/xml-dev/ > List Guidelines: http://www.oasis-open.org/maillists/guidelines.php >
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