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Been wondering, just as we use the -declaration to bind XML to a DTD, how do we do it with XSD?
MSDN sample:
<?xml version="1.0"?> <Product ProductID="123" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="Product.xsd"> <ProductName>Rugby jersey</ProductName> </Product> is it the xsi:NoNamespaceSchemaLocation that does the trick? Or is this just another namespace?
[EDIT] And is the
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" ..line just for giving us a unique XML namespace, or does it also provide information on where the schema can be located?
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Reference the XSD schema in the XML document using XML schema instance attributes such as either xsi:schemaLocation or xsi:noNamespaceSchemaLocation. Add the XSD schema file to a schema cache and then connect that cache to the DOM document or SAX reader, prior to loading or parsing the XML document.
A XML Schema can be referenced from an XML document by defining the schemaLocation and noNamespaceSchemaLocation attributes. The 'schemaLocation' attribute is used to reference XML Schema(s) that are defined in a target-namespace.
To create an XML file from an XSD file: Right-click the XML Documents folder in your data development project, and select New > XML. The New XML File wizard opens. Select the XMLSchema project in the parent folder field, type customer.
Try schemaLocation.
<?xml version="1.0"?> <note xmlns="http://www.w3schools.com" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.w3schools.com note.xsd"> <to>Tove</to> <from>Jani</from> <heading>Reminder</heading> <body>Don't forget me this weekend!</body> </note> noNamespaceSchemaLocation is different. Note that both are indeed only "hints" in theory, to a consumer of an XML document. I've never run into an xml processor that did not follow them; after all, it's a W3C recommendation. see http://www.w3.org/TR/xmlschema-1/
But indeed, it could go wrong, as here, but then again, it's considered a bug for a reason.
To go short : I just trust it, with no harm so far :-)
I don't think any half-decent xml processor can ignore this 'hint' these days.
The urls are always for uniqueness, but in some cases some info will be provided under the URL.
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