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ID - is used to provide some unique identifier for element.<br />
IDREF - is used to reference some ID. &nbsp;Generally it means that you can define IDREF with the same value as some existent ID.<br />
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This is just to ensure data integrity and consistency, to ensure you have a reference to existent element only.
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ID - is used to provide some unique identifier for element.
IDREF - is used to reference some ID.  Generally it means that you can define IDREF with the same value as some existent ID.

This is just to ensure data integrity and consistency, to ensure you have a reference to existent element only.

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Hey Dualsoul thats great thanks for the post :)<br />
<br />
Is there anyway in which you can give me a basic example ?<br />

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Hey Dualsoul thats great thanks for the post :)

Is there anyway in which you can give me a basic example ?


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Hi im trying to learn XML im very much a beginner :<br />
<br />
Im trying to understand the concept and usage of IDREFs in XML. I belive there is also ID, IDREF and IDREFS. Im not sure if they can be used to uniquely identify something, but i would like to use this, if i could understand how it works ( i am also using a DTD ).<br />
<br />
Would it please be possible for someone to explain what ID, IDREF and IDREFS is and if possible with examples explain why they would be used or how they could be used in XML. <br />
<br />
Much appreciated.<br />
<br />
Many thanks<br />
<br />
GISVPN
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Hi im trying to learn XML im very much a beginner :

Im trying to understand the concept and usage of IDREFs in XML. I belive there is also ID, IDREF and IDREFS. Im not sure if they can be used to uniquely identify something, but i would like to use this, if i could understand how it works ( i am also using a DTD ).

Would it please be possible for someone to explain what ID, IDREF and IDREFS is and if possible with examples explain why they would be used or how they could be used in XML. 

Much appreciated.

Many thanks

GISVPN

ID, IDREF could someone please explain them :)

Extensible Markup Language (XML) refers to the encoding of documents such that they can be read by both machines and humans. XML documents use tags to show the beginning and end of a set of data. XML is used extensively on websites to show volumes of data, and is the default for a number of office productivity suites. This topic includes discussions of XML-related technologies, such as XQuery (the XML Query language), XPath (the XML Path language), XSLT (eXtensible Stylesheet Language Transformations), XLink (the XML Linking language) and XPointer (the XML Pointer language).