Confused about namespace in XML schema and in XML instance doc

[Jamie Chen]

Hello, need some help to understand this.(I am using DevSutio.Net)

I set the default name space to be "http://www.w3.org/2001/XMLSchema"
in my XML schema and I use my XML schema as the default namespace in
XML instance doc. But it turns out to invlaid. Need some help to
understand why.

Many thanks

///// Here is my schema
<?xml version="1.0" encoding="utf-8" ?>
<schema targetNamespace ="http://tempuri.org/XMLSchema.xsd"
xmlns:jchen="ht tp://tempuri.org/XMLSchema.xsd"
xmlns="http://www.w3.org/2001/XMLSchema"> <<=I made this as my
default namespace
<complexType name="personTyp e">
<sequence>
<element name="FirstName " type="string" />
<element name="LastName" type="string" />
</sequence>
</complexType>
<complexType name="peopleTyp e">
<sequence maxOccurs="unbo unded">
<element name="Person" type="jchen:per sonType" />
</sequence>
</complexType>
<element name="People" type="jchen:peo pleType"></element>
</schema>

//// I then test my schema in DevStudio.Net and it becomes invalid
<?xml version="1.0" encoding="utf-8" ?>
<People xmlns="http://tempuri.org/XMLSchema.xsd"> <<=Use my schema as
default
<Person>
<FirstName> Jamie </FirstName>
<LastName> Chen </LastName>
</Person>
<Person>
<FirstName> Jonathan </FirstName>
<LastName> Chen </LastName>
</Person>
<People>

///// Person tag cannnot be found, this is very strange

[Richard Tobin]

In article <d8************ **************@ posting.google. com>,
Jamie Chen <ja*******@hotm ail.com> wrote:

<complexType name="peopleTyp e">
<sequence maxOccurs="unbo unded">
<element name="Person" type="jchen:per sonType" />

This declares a local element "Person". By default, local element
declarations apply to elements in no namespace.

You have used the (more common) convention of having all your elements
in the same namespace, rather than making the non-top-level ones be in
no namespace. So you need to add an attribute
elementFormDefa ult="qualified" to the schema element. (Or you could
add elementForm="qu alified" to the local element declaration, but if
you're going to follow the usual convention it's simpler to set the
default at the top.)

-- Richard

[Priscilla Walmsley]

Hi,

Your "Person" element is locally declared, which means that by default
it should be in no namespace. In your instance, since you use a default
namespace declaration, the Person element is considered to be in that
namespace, hence the mismatch.

You have two choices:

1. Add elementFormDefa ult="unqualifie d" to your schema element.

2. Change your instance so it looks like this, with a prefix defined and
the prefix only on the root element:

<ex:People xmlns:ex="http://tempuri.org/XMLSchema.xsd">
<Person>
<FirstName> Jamie </FirstName>
<LastName> Chen </LastName>
</Person>
<Person>
<FirstName> Jonathan </FirstName>
<LastName> Chen </LastName>
</Person>
<ex:People>

Hope that helps,
Priscilla
-----------------------------------------------------
Priscilla Walmsley pr*******@walms ley.com
Author, Definitive XML Schema (Prentice Hall PTR)
-----------------------------------------------------

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