Schema constraints (unique, key, keyref) use Xpaths. So a schema validator needs to understand a certain subset of Xpath to validate those constraints.
| [EMAIL PROTECTED]
12/02/2003 09:59 AM
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To: [EMAIL PROTECTED] cc: Subject: R�f. : RE: Xerces supports XPath ? |
XML schemas have nothing to do with X-Path. It's just a way of describing your xml data with a rich
and complex grammar.
You can have a schema contrained document (for validation) and access the data stored in it
through X-Path using xalan or any other parser.
If you need the full implementation of X-Path to browse your xml documents, you must use
the external xalan library. You parse your documents with xerces (SAX or DOM) to access
nodes and attributes and you use xalan to apply complex X-Path requests to your xml
documents (it's 2 different steps).
Some java parsers (dom4j for example) implement DOM parsing and X-Path browsing in the same library.
So you can create a DOM document from an xml instance and apply any X-Path request to this document
to retrieve nodes values or anything else.
"Jing Yang"
<[EMAIL PROTECTED] Pour : <[EMAIL PROTECTED]>
ent.com> cc :
Objet : RE: Xerces supports XPath ?
12/02/2003 03:24
PM
Veuillez
r�pondre �
xerces-j-user
My XML instance document is constrained by W3C schema and XPath.
I hope one processor can perform two tasks.
Does anybody have any clue to do that ?
Jing Yang
> -----Original Message-----
> From: Bob Foster [mailto:[EMAIL PROTECTED]
> Sent: Tuesday, December 02, 2003 8:24 AM
> To: [EMAIL PROTECTED]
> Subject: Re: Xerces supports XPath ?
>
>
> Lingzhi Zhang wrote:
>
> > It is just a minimum xpath parser. For full support to
> XPath 1.0, try
> > Xalan.
>
> By "minimum" do you mean it supports only the XPath syntax allowed by
> XML Schema selections and fields?
>
> Bob
>
>
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