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Joe AltimusSubject: SchemaLocation attribute
Author: Joe Altimus
Date: 19 Aug 2008 01:28 PM
When I try to validate the following XML document

<?xml version="1.0"?>
<mods xmlns="http://www.loc.gov/mods/v3"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.loc.gov/mods/v3 mods-3-3.xsd">
<accessCondition>xyz</accessCondition>
</mods>

why does StylusStudio report "FATAL ERROR: Cannot open mods-3-3.xsd
" when other XML editors are able to open mods-3-3.xsd and validate the XML document?

If I change the schemaLocation attribute to

xsi:schemaLocation="http://www.loc.gov/mods/v3 http://www.loc.gov/mods/v3/mods-3-3.xsd

then StylusStudio is able to open the xsd instance and validate the document. But other XML editors don't require that full expression of the instance. ???

Postnext
Tony LavinioSubject: SchemaLocation attribute
Author: Tony Lavinio
Date: 20 Aug 2008 11:10 AM
Does a copy of mods-3-3.xsd exist in the same directory as the
file you are validating? If not, unless a catalog is used, the
resolver should *not* use the namespace to find the schema.
Namespaces and schema locations, although they can have similar
appearances, are not related.

Now, a catalog can use used to redirect references. You might
find the article http://www.stylusstudio.com/super_catalogs.html
useful.

Also, please try using some of the other validators. Each
validator has its own quirks, and the specification leaves some
wiggle room - this is why we have provided a variety with
Stylus Studio.

Posttop
Joe AltimusSubject: SchemaLocation attribute
Author: Joe Altimus
Date: 20 Aug 2008 03:05 PM
Thanks for the reply.

You say "the resolver should *not* use the namespace to find the schema" but I notice in section 4.3.2 of XML Schema Part 1: Structures (http://www.w3.org/TR/xmlschema-1/) the fifth strategy for "Schema Representation Constraint: Schema Document Location Strategy" is

Attempt to resolve the namespace name to locate such a resource.

Doesn't that mean a schema-aware processor *may* use the namespace name to find the schema?

   
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