473,698 Members | 2,392 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

ID/IDREF or Key/Keyref

Hello.

I start to study XML and have a question. What`s the difference
between ID/IDREF
and Key/Keyref? What's better to use?

Thanks.

Oct 25 '07 #1
0 1782

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

0
1804
by: Markus Seibold | last post by:
Hello NG, sorry for pasting that much code but I just can't figure out how get the <key><keyref> to work in XML Schema. I am using XMLSpy 4.3 for editing my XML. I want to represent a recursive 1:n relationship between a database table AdminUnit (i.e., States consist of Counties).
2
6925
by: Nicolas Bouillon | last post by:
Hi I am writing a schema and i want to have an element's attribute, which is an IDREF to an other type of element. For example <Type1 id="id1"/> <Type2 id="id2"/>
5
6511
by: Russell O'Connor | last post by:
The following XML and Schema doesn't validate in Visual Studio .NET 2003. Is there some mistake I'm making, or is VS.NET in error. The error is r:\test2.xml(3): The key sequence 'foo' in Keyref fails to refer to some key. An error occurred at , (3, 6). Any help is appreciated. Here is the schema. <?xml version="1.0" ?> <xs:schema id="NewDataSet" targetNamespace="http://tempuri.org/test2.xsd" xmlns:mstns="http://tempuri.org/test2.xsd"
1
2859
by: Dmitry Martynov | last post by:
Hi I have a question whether XmlValidatingReader doesn't check keyref constrain (the same with key constraint) or I do smth wrong. I have the following schema <?xml version="1.0" encoding="utf-8"?> <xs:schema id="module" targetNamespace="http://tempuri.org/module.xsd"
2
2847
by: svestin | last post by:
Hi All! I run into a problem defining a XSD schema with KEYREF references. Is it possible to use KEYREF with nillable fields? Just like a database where a FK could be null. In the example below the tag <Owner> is nillable and also used as FIELD in the KEYREF.
3
9924
by: Eric Lilja | last post by:
Sorry for asking so many questions, but I've just started and need to get some things working so I can do the task that is before me. Consider this (validating) schema: <?xml version="1.0"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" targetNamespace="myns" xmlns="myns" elementFormDefault="qualified"> <xs:element name="books"> <xs:complexType> <xs:sequence>
2
2936
by: maxwell | last post by:
I'm trying to write a schema, and test it by running an xml file of test data based on that schema through xmllint. I'm having a problem, because xmllint ( --version reports "using libxml version 20616") doesn't seem to know anything about idref, key or keyref. Specifically, the use of 'xsd:key' and 'xsd:keyref' in the schema causes xmllint to output Unimplemented block at xmlschemas.c:5588 and the use of 'idref' (but not of 'id')...
2
2017
by: Luigi | last post by:
Hello! I'm writing a schema where an element has got a reference to another element via IDREF. The problem is that I would restrict the possible references to the sole elements of a specific type, or, in other words, to those element with a specific tag name. For instance: <xs:element name="A"> <xs:complexType> <xs:attribute name="id" type="xs:ID"/>
4
2489
Dormilich
by: Dormilich | last post by:
Hello, I'm back with a problem, where I need help with starting. I got an XML file that contains a number of elements with IDREF type attributes: <?xml version="1.0" ?> <root> // these elements contain all the info for the groups // name is of type ID <group name="group1" … /> <group name="group2" … />
0
9166
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
1
8899
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For most users, this new feature is actually very convenient. If you want to control the update process,...
0
8871
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
1
6525
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5861
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
4621
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
3052
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
2
2333
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
2007
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.