having difficulties with 'choice'

[SL33PY]

Hi,

I'm currently busy writing an xsd at one point in time i whish that my xml must look like:

<object>
    <loc>
        <disk>
            <drive>c</drive>
            <path>temp\path</path>
            <files>*.*</files>
        </disk>
    </loc>
    <interval>
        ...
    </interval>
</object>

or (choice)

<object>
    <loc>
        <network>
            <server>localhost</server>
            <path>temp\path</path>
            <files>*.*</files>
        </network>
    </loc>
    <interval>
        ...
    </interval>
</object>
 

or (another choice)

<object>
    <loc>
        <internet>
            <uri>123.456.789.123</uri>
            <path>temp\path</path>
            <files>*.*</files>(optional (if webservice))
            <port>8888</port>(optional)
                ....
        </internet>
    </loc>
    <interval>
        ...
    </interval>
</object>
 

so the <loc> tag can contain (in my case) 5 different objects, which are all locations of some sorts. But the <loc> tag may only contain one (complex) child, which can be either an <internet>tag , a <network> tag or a <disk> tag.

How to get to my question: How do I pull this off in my XSD?

This is what I tried:

<xs:complexType name="Location">
    <xs:sequence maxOccurs="1" minOccurs="1">
        <xs:choice maxOccurs="1" minOccurs="1">
            <xs:element name="localDisk" type="LocalDisk" maxOccurs="1" minOccurs="0" />
            <xs:element name="networkLocation" type="NetworkLocation" maxOccurs="1" minOccurs="0" />
            <xs:element name="internetSite" type="InternetSite" maxOccurs="1" minOccurs="0" />
            <xs:element name="secureInternetSite" type="SecureInternetSite" maxOccurs="1" minOccurs="0" />
            <xs:element name="ftpSite" type="FtpSite" maxOccurs="1" minOccurs="0" />
        </xs:choice>
    </xs:sequence>
</xs:complexType>
 
<xs:complexType name="TextDataProvider">
    <xs:sequence>
        <xs:element name="location" type="Location" maxOccurs="1" minOccurs="1" />
        <xs:element name="interval" type="Interval" maxOccurs="1" minOccurs="1" />
        <xs:group ref="textSchema" maxOccurs="1" minOccurs="1" />
    </xs:sequence>
    <xs:attributeGroup ref="Identification" />
</xs:complexType>
 
<xs:complexType name="Configuration">
    <xs:sequence>
        <xs:choice maxOccurs="3" minOccurs="1">
            <xs:element name="textProviders" maxOccurs="unbounded" minOccurs="1" type="TextDataProviders" />
            <xs:element name="csvProviders" maxOccurs="unbounded" minOccurs="0" type="CsvDataProviders" />
            <xs:element name="xmlProviders" maxOccurs="unbounded" minOccurs="0" type="XmlDataProviders" />
        </xs:choice>
    </xs:sequence>
</xs:complexType>
 
<xs:element name="configuration" type="Configuration"></xs:element>
 
<xs:complexType name="TextDataProviders">
    <xs:sequence>
        <xs:element name="dataprovider" type="TextDataProvider" minOccurs="0" maxOccurs="unbounded" />
    </xs:sequence>
</xs:complexType>
 

But that doesn't do the trick, because when I'm forming an xml based on this xsd I can add as many locations of any kind within the location tag

I must be doing something wrong, I just can't see it at this time.

With kind regards,
- SL33PY

[SL33PY]

I've been thinkering a bit, as well as reading some additional sources and I made a temp xsd and xml:

The temp xsd:

<?xml version="1.0" encoding="utf-8" ?>
<xs:schema targetNamespace="XMLSchema1.xsd" elementFormDefault="qualified" xmlns="XMLSchema1.xsd"
    xmlns:mstns="XMLSchema1.xsd" xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="Configuration">
        <xs:annotation>
            <xs:documentation>
                This tag describes the configuration of the system.
                It consists of maximum 3 childs representing the different kinds of
                providers that our application can process. Every child represents a group
                of data providers of a specific kind.
            </xs:documentation>
        </xs:annotation>
        <xs:complexType>
            <xs:choice minOccurs="1" maxOccurs="3">
                <xs:element name="TextProviders" maxOccurs="1" minOccurs="0" type="xs:string" /><!--type="TextProvidersType" />-->
                <xs:element name="CsvProviders" maxOccurs="1" minOccurs="0" type="xs:string" /><!--type="CsvProvidersType" />-->
                <xs:element name="XmlProviders" maxOccurs="1" minOccurs="0" type="xs:string" /><!--type="XmlProvidersType" />-->
            </xs:choice>
        </xs:complexType>
    </xs:element>
</xs:schema>

The temp xml:

<?xml version="1.0" encoding="utf-8" ?>
<Configuration xmlns="XMLSchema1.xsd">
    <CsvProviders></CsvProviders>
    <TextProviders></TextProviders>
    <XmlProviders></XmlProviders>
</Configuration>
 

at this moment it works, but...

I adjusted my older xsd file and the xsd gets validated, still I cannot select it from the list (VS 2003) in the targetnamespace property field, I can select the xmlschema1.xsd but not my bigger one :confused:

I'll expand this test xsd and perhaps I can find out why the other doesn't work as intended. If anyone has hints/tips/more insight, please let me know asap

- SL33PY