xml-dev - Namespace for a collection of related schemas?

["Roger L. Costello" <costello@mitre.org>]

Hi Folks,

I have three related questions (below).  Any thoughts that you might
have on any of these questions would be appreciated.  /Roger

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Question 1.

Suppose that I have a collection of XML Schemas and the schemas are
related.

Example (auto industry).  Suppose that I have an XML Schema for each
type of auto:

truck.xsd - schema for trucks
suv.xsd - schema for sports utility vehicles
minivan.xsd - schema for minivans
sedan.xsd - schema for sedans
coupe.xsd - schema for coupes
etc.

What namespace do I use for the schemas:

(1) A single, umbrella, namespace for the entire collection?  Thus, each
of the above auto schemas would have the same targetNamespace.

or,

(2) A different namespace for each schema?  Thus, each of the above auto
schemas would have a different targetNamespace.

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Question 2.

If I were to use the single, umbrella, namespace then when I create,
say, coupe.xsd would I need to examine all the other schemas to ensure
that I don't declare an element with the same name?  Stated another way,
is the scope of an element declaration confined to the schema document,
or, to the namespace (which in my example spans multiple schema
documents)?

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Question 3.

Consider a respository of namespaces (and the elements associated with
the namespaces).  For managing things it might be easier to have one
namespace for the collection than separate namespaces.  Any thoughts on
this?


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