Re: DTD to Scheme

You're on the wrong list for XML Schema questions - the right place is
xmlschema-dev@xxxxxxx

But the answer is that you can express this model without violating UPA. In
shorthand, you write it as

((waiting,passing?)|passing)

Michael Kay
http://www.saxonica.com/

-----Original Message-----
From: Stano Paska [mailto:paska@xxxxxxx] Sent: 02 February 2005 05:23
To: xsl-list@xxxxxxxxxxxxxxxxxxxxxx
Subject: DTD to Scheme

Hi,

I need rewrite som DTD into XML Schema.
I have problem with one part.
In element "item" there may be three combinations of waiting/passing
elements:
one waiting, one passing, or both.

In DTD it is easy and it works:
<!ELEMENT item (risid,(waiting|passing|(waiting,passing)))>

In Scheme it is easy, but it does not work:
    <xsd:element name="item">
        <xsd:complexType>
            <xsd:sequence>
                <xsd:element ref="risid"/>
                <xsd:choice>
                    <xsd:element ref="waiting"/>
                    <xsd:element ref="passing"/>
                    <xsd:sequence>
                        <xsd:element ref="waiting"/>
                        <xsd:element ref="passing"/>
                    </xsd:sequence>
                </xsd:choice>
            </xsd:sequence>
        </xsd:complexType>
    </xsd:element>

:0,0: Complex type 'C0' violates the Unique Particle Attribution rule in
its components 'waiting' and 'waiting'

It is possible to write corresponding schema?

Thanks for your solutions.

Stano.

Attachments:
-----------------
test.xml
-----------------
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE result SYSTEM "d:\praca\lucia\klient\dtd.dtd">
<result>
	<item>
		<risid>DE307001001223</risid>
		<waiting>
			<average>13.99</average>
			<deviation>6.27</deviation>
			<count>4</count>
		</waiting>
		<passing>
			<average>13.99</average>
			<deviation>6.27</deviation>
			<count>4</count>
		</passing>
	</item>
</result>

----------------
DTD
----------------
<?xml version="1.0" encoding="UTF-8"?>

<!ELEMENT result (item+|error)>

<!ELEMENT error (#PCDATA)>
<!ELEMENT item (risid,(waiting|passing|(waiting,passing)))>

<!ELEMENT risid (#PCDATA)>
<!ELEMENT waiting (average,deviation,count)>
<!ELEMENT passing (average,deviation,count)>

<!ELEMENT average (#PCDATA)>
<!ELEMENT deviation (#PCDATA)>
<!ELEMENT count (#PCDATA)>

-----------------
Scheme
-----------------
<?xml version="1.0" encoding="UTF-8"?>
<xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema">

	<!-- simple elements -->
	<xsd:element name="risid" type="xsd:string"/>
	<xsd:element name="average" type="xsd:decimal"/>
	<xsd:element name="deviation" type="xsd:decimal"/>
	<xsd:element name="count" type="xsd:nonNegativeInteger"/>
	<xsd:element name="error" type="xsd:string"/>

	<!-- complex elements -->
	<xsd:complexType name="record">
		<xsd:sequence>
			<xsd:element ref="average"/>
			<xsd:element ref="deviation"/>
			<xsd:element ref="count"/>
		</xsd:sequence>
	</xsd:complexType>
	<xsd:element name="waiting" type="record"/>
	<xsd:element name="passing" type="record"/>

<xsd:element name="item">
<xsd:complexType>
<xsd:sequence>
<xsd:element ref="risid"/>
<xsd:choice>
<xsd:element ref="waiting"/>
<xsd:element ref="passing"/>
<xsd:sequence>
<xsd:element ref="waiting"/>
<xsd:element ref="passing"/>
</xsd:sequence>
</xsd:choice>
</xsd:sequence>
</xsd:complexType>
</xsd:element>

<xsd:element name="result">
<xsd:complexType>
<xsd:choice>
<xsd:element ref="error"/>
<xsd:element ref="item" maxOccurs="unbounded"/>
</xsd:choice>
</xsd:complexType>
</xsd:element>

</xsd:schema>

--
Stanislav Paka
programator, www skupina
KIOS s.r.o.
tel: 033 / 794 00 18