[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message]

RE: Namespaces and XML Schema validation


validate my xml
Thanks, that is a very helpful link.

Rex

At 11:09 AM +0000 11/20/02, helen.mauger@r... wrote:
>This link may be of help
>http://www.xfront.com/ZeroOneOrManyNamespaces.html
>
>H
>-----Original Message-----
>From: Rex Brooks [mailto:rexb@s...]
>Sent: 19 November 2002 19:47
>To: Priscilla Walmsley; 'Peter Bergström'; xml-dev@l...
>Subject: RE:  Namespaces and XML Schema validation
>
>
>Is it possible to have a number of schemata that are extensions of a
>primary base schema within a single namespace? Or, do you have to
>create serial namespaces to accommodate such a multi-part modular
>language structure? Since that is exactly what we are doing with
>Human Markup, it would helpful. We are currently in the 30-day public
>comment period for our first spec so we are no where close to moving
>on to the secondary base schema.
>
>Thanks,
>Rex
>
>
>At 9:01 AM -0500 11/19/02, Priscilla Walmsley wrote:
>>Hi Peter,
>>
>>Yes, you can only have one schema document per namespace, so you will
>>be required to have a.xsd, b.xsd, etc.
>>
>>>   PROBLEM 1
>>>
>>>
>>>   Example document:
>>>   <?xml version="1.0">
>>>   <a1 xsi:noNamespaceSchemaLocation="a.xsd"
>>>       xmlns:b="http:\\example.org\b\"
>>>       xmlns:c="http:\\example.org\c\">
>>>     <b:b1>This is element B1 from namespace B</b:b1>
>>>     <a2>This is the second element from schema a</a2>
>>>     <c:c1>This element is from namespace c</c:c1>
>>>   </a1>
>>
>>a.xsd would look something like this:
>>
>><xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema"
>>              xmlns:b="http:\\example.org\b\"
>>              xmlns:c="http:\\example.org\c\">
>><xsd:import namespace="http:\\example.org\b\" schemaLocation="b.xsd"/>
>><xsd:import namespace="http:\\example.org\c\" schemaLocation="c.xsd"/>
>>
>><xsd:element name="a1" type="a1Type"/>
>><xsd:complexType name="a1Type">
>>    <xsd:sequence>
>>      <xsd:element ref="b:b1"/>
>>      <xsd:element name="a2" type="xsd:string"/>
>>      <xsd:element ref="c:c1"/>
>>    </xsd:sequence>
>></xsd:complexType>
>>
>>and b.xsd and c.xsd would declare the b1 and c1 elements, globally.
>>
>>>   PROBLEM 2
>>>
>>>   Can I nest the namespaces in such an XML document, so that  elements
>>>  from one  namespace contains elements from other namespaces, and
>>>  still  validate my XML
>>>   document against one or several XML Schemas?
>>
>>Yes, in this case you could have a.xsd import the b namespace, and
>>b.xsd import the c namespace.
>>
>>>   PROBLEM 3
>>>
>>>   Can elements from one namespace occur several times in a  hierarchy
>>>  where  elements from other namespaces occur as fathers, i.e. true
>>>   nesting, and
>>>   still validate my XML document against one or several XML
>>>   Schemas? And how
>>>   would the XML Schemas that defines those namespaces look like?
>>
>>Yes, in that case a.xsd could import the b namespace, and b.xsd could
>>import the a namespace.  Same thing with b and c. (there is no rule
>>that says "circular imports" are not allowed; in fact, they are
>>necessary.)
>>
>>
>>>   PROBLEM 4
>>>
>>>   Can I, using the example from my problem 3, enforce (through
>>>   validation)
>>>   that instances are created with exactly those elements,  occuring
>>>  just one  time each, with one single XML Schema?
>>
>>I assume you mean one single schema _document_ (since an XML Schema can
>>be made up of more than one document, as we have seen above).  No, you
>>can't - the best you could do is put wildcards where you want the
>>elements from other namespaces to go.  Wildcards will allow you to
>>constrain the namespace and number of elements that appear, but will
>>not validate those elements without a schema document for that
>>namespace.
>>
>>
>>The examples from my XML Schema book are online at:
>>
>>http://www.datypic.com/books/DefXMLSchema/Examples.html
>>
>>I can't guarantee they're the exact same structure as your examples,
>>but they might help.
>>
>>Hope that helps!
>  >Priscilla
>>
>>-----------------------------------------------------
>>Priscilla Walmsley             priscilla@w...
>>Author, Definitive XML Schema     (Prentice Hall PTR)
>>-----------------------------------------------------
>>
>>
>>-----------------------------------------------------------------
>>The xml-dev list is sponsored by XML.org <http://www.xml.org>, an
>>initiative of OASIS <http://www.oasis-open.org>
>>
>>The list archives are at http://lists.xml.org/archives/xml-dev/
>>
>>To subscribe or unsubscribe from this list use the subscription
>>manager: <http://lists.xml.org/ob/adm.pl>
>
>
>--
>Rex Brooks
>Starbourne Communications Design
>1361-A Addison, Berkeley, CA 94702 *510-849-2309 http://www.starbourne.com *
>rexb@s...
>
>
>
>
>_______________________________________________________________________
>
>The information contained in this email is confidential and is intended
>for the use of the addressee only. Any unauthorised dissemination or
>copying of this email, and any use of disclosure of information
>contained in it, is strictly prohibited and may be illegal.
>
>Please let us know immediately by telephone if the email has been sent
>to you in error (+44 1481 711166).
>________________________________________________________________________


--
Rex Brooks
Starbourne Communications Design
1361-A Addison, Berkeley, CA 94702 *510-849-2309
http://www.starbourne.com * rexb@s...


PURCHASE STYLUS STUDIO ONLINE TODAY!

Purchasing Stylus Studio from our online shop is Easy, Secure and Value Priced!

Buy Stylus Studio Now

Download The World's Best XML IDE!

Accelerate XML development with our award-winning XML IDE - Download a free trial today!

Don't miss another message! Subscribe to this list today.
Email
First Name
Last Name
Company
Subscribe in XML format
RSS 2.0
Atom 0.3
 

Stylus Studio has published XML-DEV in RSS and ATOM formats, enabling users to easily subcribe to the list from their preferred news reader application.


Stylus Studio Sponsored Links are added links designed to provide related and additional information to the visitors of this website. they were not included by the author in the initial post. To view the content without the Sponsor Links please click here.

Site Map | Privacy Policy | Terms of Use | Trademarks
Free Stylus Studio XML Training:
W3C Member
Stylus Studio® and DataDirect XQuery ™are products from DataDirect Technologies, is a registered trademark of Progress Software Corporation, in the U.S. and other countries. © 2004-2013 All Rights Reserved.