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attributes and elements -> enumeration

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attributes and elements -> enumeration XML Programming forum discussing XML and related technologies, including XUL and XSL. XML is a self-describing file format, designed for maximum compatibility between applications.

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  #1  
Old July 2nd, 2003, 09:30 AM
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tigercat tigercat is offline
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attributes and elements -> enumeration
hi there

enumeration on elements are simple. on attributes as well. but how do i combine both?

example 1: XML: enum on attribute ...
PHP Code:
<LOCATION lang="EN"></LOCATION>

<!-- schema -->
<xsd:element name="LOCATION" type="LOCATION_TYPE"/>

<xsd:complexType name="LOCATION_TYPE">
    <xsd:simpleContent>
        <xsd:extension base="xsd:string">
            <xsd:attribute name="lang" type="lang_TYPE"/>
        </xsd:extension>
    </xsd:simpleContent>
</xsd:complexType>

<xsd:simpleType name="lang_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="DE"/>
        <xsd:enumeration value="EN"/>
    </xsd:restriction>
</xsd:simpleType>                            --> WORKS WELL 
example2: XML: enum on element...
PHP Code:
<LOCATION>city</LOCATION>

<!-- schema -->
<xsd:element name="LOCATION" type="LOCATION_TYPE"/>

<xsd:simpleType name="LOCATION_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="city"/>
        <xsd:enumeration value="town"/>
    </xsd:restriction>
</xsd:simpleType>                            --> WORKS WELL 
the question remaining is: how do i combine both to make "lang" and "city" enumerable?
i've played around with simple and complexType, simple and complexContent but it always caused an ERROR (in this case: "unexpected child element 'xsd:attribute' ") - so the following wont work
PHP Code:
<LOCATION lang="EN">city</LOCATION>

<xsd:simpleType name="LOCATION_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="city"/>
        <xsd:enumeration value="town"/>
    </xsd:restriction>
    <xsd:attribute name="lang" type="lang_TYPE"/>
</xsd:simpleType> 


thanks for any hint

tigercat
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  #2  
Old July 2nd, 2003, 01:08 PM
bricker42 bricker42 is offline
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First, a disclaimer: I know next to nothing about xsd.

Now, it looked like you were missing a tag.

Code:
<LOCATION lang="EN">city</LOCATION>

<xsd:simpleType name="LOCATION_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="city"/>
        <xsd:enumeration value="town"/>
    </xsd:restriction>
    <xsd:extension base="xsd:string">   <!-- missing this tag -->
        <xsd:attribute name="lang" type="lang_TYPE"/>
    </xsd:extension>
</xsd:simpleType>
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  #3  
Old July 3rd, 2003, 12:15 AM
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hi bricker,
thanks for your reply. but your hint didn't work.
but there is a solution i found on my own that is that simple that i first didn't see. here it is.
tigercat
PHP Code:
<LOCATION lang="EN">city</LOCATION>

<xsd:element name="LOCATION" type="LOCATION_TYPE"/>

<xsd:complexType name="LOCATION_TYPE">
    <xsd:simpleContent>
        <xsd:extension base="loc_TYPE"> <!-- just substitute xsd:string with loc_TYPE -->
            <xsd:attribute name="lang" type="lang_TYPE"/>
        </xsd:extension>
    </xsd:simpleContent>
</xsd:complexType>

<xsd:simpleType name="loc_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="city"/>
        <xsd:enumeration value="town"/>
    </xsd:restriction>
</xsd:simpleType>

<xsd:simpleType name="lang_TYPE">
    <xsd:restriction base="xsd:string">
        <xsd:enumeration value="DE"/>
        <xsd:enumeration value="EN"/>
    </xsd:restriction>
</xsd:simpleType> 
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